Category: Fused Coupler

Use of 2.0μm Single-Mode Fused Couplers in Fiber Optic Systems

Data travels at the speed of light in the world of fiber optics and every component plays an important role in making sure that the communication is efficient and reliable. The single-mode fused coupler is one such important component. When talking about single-mode couplers, 2.0μm single-mode fused couplers are an effective single-mode coupler used in optic fibers.

Today, we’re going to explore the advantages of using 2.0μm single-mode fused couplers in fiber optic systems. But first, let’s understand what a single-mode fused coupler is.

Understanding Single-mode Fused Couplers

Imagine a device that can split or combine optical signals traveling through fiber optic cables. That’s what a single-mode fused coupler does. It’s a small, yet powerful, device that can take a single input signal and divide it into two or more output signals, or it can combine multiple input signals into a single output.

Now, how does this work in a fiber optic system?

Imagine you have a fiber optic cable that’s carrying data, and you need to access that data at multiple points along the way. That’s where the single-mode fused coupler comes in. It can be installed in the fiber optic cable, and it will allow you to tap into the signal without interrupting the main data flow. This is incredibly useful for functions such as monitoring the network, splitting the signal for different purposes, or even adding new connections to the system.

But why use a 2.0μm single-mode fused coupler, especially? Let’s explore the five key advantages:

5 Main Advantages of 2.0μm single-mode fused coupler

1. Improved Performance

The 2.0μm wavelength range offers superior performance compared to the traditional telecom wavelengths. Therefore, it results in higher data transmission rates, lower signal loss, and better overall efficiency in your fiber optic system.

2. Reduced Attenuation

One of the biggest challenges in fiber optic systems is signal attenuation, where the signal weakens as it travels through the cable. The 2.0μm wavelength has significantly lower attenuation, which means the signal can travel much farther without needing to be amplified or repeated.

3. Enhanced Stability

The 2.0μm single-mode fused coupler is designed with exceptional stability in mind. This device provides reliable and consistent operation even in challenging environments like fluctuations in temperature and vibrations.

4. Increased Bandwidth

The 2.0μm wavelength range offers a wider bandwidth compared to traditional telecom wavelengths. This device is considered ideal for applications that require high-bandwidth communication because of its ability to transfer more data at faster speeds.

5. Compatibility with Emerging Technologies

As technology continues to evolve, the 2.0μm wavelength range is becoming increasingly important. Many cutting-edge laser systems and advanced research applications are leveraging this wavelength, and the 2.0μm single-mode fused coupler is perfectly suited to integrate with these new technologies.

Whether you’re a network administrator, a telecommunications engineer, or someone who appreciates the power of modern communication technology, the 2.0μm single-mode fused coupler is definitely worth considering for your fiber optic needs.

How Polarization Maintaining Filter Couplers Improve Signal Quality

In our increasingly connected world, the ability to reliably transmit high-fidelity data is more critical than ever. The backbone of modern telecommunications and fiber optic networks relies on pristine signal quality to function optimally. This is where innovative components like Polarization Maintaining Filter Couplers come into play. 

By precisely controlling the polarization of light, these devices ensure consistent and error-free data transmission across global communication networks. 

Introducing Polarization Maintaining Filter Couplers 

Polarization effects have long been the bane of optical engineers, introducing distortions that degrade signal integrity. Polarization Maintaining Filter Couplers overcome this by using specialized fibers and advanced filtering techniques to maintain consistent polarization alignment as light propagates through the system. The resulting enhancement in signal quality and stability unlocks the true potential of modern high-speed fiber optic networks. 

How Polarization Maintaining Filter Couplers Work 

The inner workings of Polarization Maintaining Filter Couplers leverage the polarization sensitivity of light. As an electromagnetic wave, light consists of oscillating electric and magnetic fields. The orientation of these fields defines the polarization state. Within optical fibers, factors like stress, bending, and temperature changes can randomly alter polarization, scattering the signal. Polarization Maintaining Filter Couplers counteract this by coupling light selectively based on the polarization state. 

This enables precise separation and processing of optical signals in systems like dense wavelength division multiplexing (DWDM), a key technology for expanding telecom network capacity. By assigning separate wavelengths to distinct polarization channels, vastly more information can be transmitted through a single fiber optic cable. Polarization Maintaining Filter Couplers is crucial to extract and process each polarized wavelength channel independently. 

Enhancement to Signal Integrity 

As optical technologies progress, the underlying need for pristine signal quality persists. Polarization Maintaining Filter Couplers answer this need with an elegant solution that leverages the very nature of light itself. Their unique ability to manipulate polarization states establishes them as an enabling technology across a diverse range of fields. 

Applications across Industries 

The telecommunications industry relies extensively on such polarization-splitting components. But the applications extend much further. Any field that utilizes laser systems can benefit from the signal-enhancing capabilities of Polarization Maintaining Filter Couplers. From medical devices to industrial manufacturing, they optimize laser performance by ensuring a stable polarized output, free from disruptive polarization fluctuations. 

Scientific research involving lasers also demands the precision that polarization-maintaining couplers offer. Applications like laser interferometry, nonlinear optics, and quantum computing often require intricate polarization control to conduct cutting-edge experiments. By stabilizing inherent polarization variability, these couplers enable groundbreaking research. 

From powering global digital infrastructure to pushing the frontiers of scientific research, Polarization Maintaining Filter Couplers are indispensable components for the modern photonics engineer’s toolkit. Their capacity to enhance signal integrity empowers the realization of systems and applications limited only by imagination. 

Single-Mode Fused Couplers vs. Multimode: Choosing the Right Option

In the vast world of fiber optics, choosing the right type of coupler is crucial for optimizing your network’s performance. One of the key decisions you’ll face is whether to go with a single-mode fused coupler or a multimode option. Understanding the differences between these two can make a significant impact on your network efficiency. Let’s delve into the nuances of each and help you make an informed decision.

Understanding Single-Mode Fused Couplers

Single-mode fused couplers are precision-engineered devices designed for use in single-mode fiber optic systems. Single-mode fibers allow only a single mode of light to propagate through the core, resulting in less signal dispersion and higher bandwidth capabilities. This makes them ideal for long-distance communication and high-speed data transmission.

A single-mode fused coupler operates by combining or splitting optical signals with minimal loss. The ‘fused’ aspect refers to the manufacturing process, where two or more fibers are precisely aligned and then fused together to create a single device. This meticulous alignment ensures minimal signal loss, making single-mode fused couplers highly efficient for demanding applications.

The Multimode Perspective

On the other hand, multimode fibers support multiple modes of light, allowing for more signal paths within the core. This characteristic makes multimode fibers suitable for shorter-distance communication and applications where high bandwidth is not as critical. Multimode couplers are also fused during the manufacturing process, but the larger core diameter accommodates more light modes, which can lead to higher signal dispersion.

Key Differences: Bandwidth and Distance

The primary factor that often dictates the choice between single-mode and multimode fused couplers is the required bandwidth and transmission distance. Single-mode fibers offer significantly higher bandwidth and longer transmission distances, making them the preferred choice for applications such as telecommunications, long-haul data transmission, and high-speed internet connections.

In contrast, multimode fibers are suitable for shorter distances and applications where high bandwidth is not the primary concern. They are commonly used in local area networks (LANs), shorter data connections, and applications where cost-effectiveness is a key consideration.

Advantages of Single-Mode Fused Couplers

High Bandwidth: Single-mode fibers support higher bandwidth, enabling faster and more reliable data transmission over longer distances.

Low Signal Dispersion: The single-mode design minimizes signal dispersion, ensuring that the transmitted data arrives at its destination with minimal distortion.

Long Transmission Distances: Ideal for long-distance communication, single-mode fused couplers are the go-to choice for applications that span vast geographical areas.

Advantages of Multimode Fused Couplers

Cost-Effective: Multimode fibers are generally more cost-effective than their single-mode counterparts, making them a practical choice for shorter-distance applications.

Ease of Installation: The larger core diameter of multimode fibers makes them more forgiving during installation, simplifying the setup process.

Versatility: While not suitable for long-distance communication, multimode fibers are versatile and find applications in LANs and other local networking environments.

Choosing the Right Option

When deciding between single-mode fused couplers and multimode alternatives, it’s essential to assess your specific needs and the nature of your network.

Consider Distance Requirements: If your network spans long distances, a single-mode fused coupler is likely the better choice. For shorter distances and local networking, multimode may be more suitable.

Evaluate Bandwidth Needs: If your applications demand high bandwidth, especially for data-intensive tasks, single-mode is the preferred option. For less demanding applications, multimode could provide a cost-effective solution.

Budget Considerations: While single-mode couplers generally offer superior performance, the higher cost may be a factor. If budget constraints are a concern and your network requirements align with multimode capabilities, it could be the more practical choice.

Conclusion

In the world of fiber optics, the choice between single-mode fused couplers and multimode alternatives depends on your network’s specific requirements. Assessing factors such as bandwidth needs, transmission distances, and budget considerations will guide you towards the most suitable option. Whether you’re building a long-distance telecommunications network or a local area network for your business, understanding the differences between these couplers is the first step in making an informed decision that ensures optimal network performance.

Understanding Optical Fused Couplers: A Key Component in Optical Networking

In the realm of optical networking, where data is transmitted at the speed of light through fiber-optic cables, there exist numerous intricate components that enable this seamless flow of information. One such crucial component is the Optical Fused Coupler, an unassuming yet fundamental device that plays a pivotal role in splitting or combining optical signals with precision and efficiency.

What is an Optical Fused Coupler?

An Optical Fused Coupler, also known as a fused fiber coupler or splitter, is a passive optical device designed to split or combine optical signals. It operates on the principle of fusing together multiple optical fibers to manipulate the flow of light signals. This process involves carefully melting and fusing fibers together, allowing the light to either combine into a single output or split into multiple paths.

How Does it Work?

At its core, an Optical Fused Coupler takes multiple input fibers and merges them into a single output fiber, or conversely, splits a single input into multiple outputs. This is achieved through the careful alignment and fusion of the fibers in a way that allows for efficient signal transfer between them.

The basic structure typically involves two or more input fibers that are precisely aligned and fused together in a way that enables the transfer of light between them. This fusion creates a region where the optical signals interact, leading to either combining or splitting of the signals based on the design and intended application.

Applications in Optical Networking

The versatility and efficiency of Optical Fused Couplers have made them indispensable in various applications within optical networking:

1. Fiber Optic Communications: Couplers are used in optical networks to split signals from a single source into multiple paths, enabling data distribution to different destinations.

2. Sensors and Instrumentation: In sensing applications, couplers aid in distributing optical signals to multiple sensors, facilitating data collection and analysis.

3. Biomedical Instrumentation: Optical couplers play a crucial role in biomedical devices for optical imaging, sensing, and diagnostics.

4. Test and Measurement Equipment: They are utilized in test setups to split optical signals for precise measurements and analysis.

Advancements and Future Prospects

Ongoing advancements in optical technology continue to refine Optical Fused Couplers, enhancing their performance and capabilities. Innovations in materials and manufacturing techniques aim to improve efficiency, reduce signal loss, and extend their applications across diverse industries.

Closing Thoughts

In the intricate landscape of optical networking, the Optical Fused Coupler stands as a testament to the precision and innovation driving the field forward. Its ability to seamlessly manage optical signals, whether splitting or combining them, underscores its significance in enabling the high-speed, data-rich communications that define our interconnected world. As technology evolves, so too will the role and capabilities of this unassuming yet indispensable component.

Unveiling the Magic of 980/1550nm Fused Wavelength Division Multiplexing (WDM)

In the world of optical communication, innovation never stops. As we continue to push the boundaries of data transmission and network capacity, the technology behind it evolves at an incredible pace. One such innovation is the 980/1550nm Fused Wavelength Division Multiplexing (WDM), a critical component that enables high-speed data transmission in modern optical networks.

In this blog, we’ll dive deep into the realm of 980/1550nm Fused WDM technology, exploring its significance, working principles, and applications.

Understanding Wavelength Division Multiplexing (WDM)

Before delving into the specifics of 980/1550nm Fused WDM, it’s essential to grasp the fundamental concept of Wavelength Division Multiplexing (WDM). WDM is a technology that allows multiple optical signals of different wavelengths to be combined and transmitted over a single optical fiber. This technique significantly enhances the bandwidth and efficiency of optical communication networks.

The 980/1550nm Fused WDM: What Makes It Special?

980/1550nm Fused WDM is a subtype of WDM technology, optimized for specific wavelengths: 980nm and 1550nm. Here’s why it’s significant:

1. Enhanced Signal Transmission: The 980nm wavelength is well-suited for amplification, making it ideal for transmitting signals over long distances without significant loss.

2. Reduced Signal Interference: The 1550nm wavelength is commonly used in optical networks and is known for its low signal interference characteristics. By fusing these two wavelengths, 980/1550nm Fused WDM provides a reliable solution for data transmission.

How Does 980/1550nm Fused WDM Work?

980/1550nm Fused WDM operates on a simple principle – combining the 980nm and 1550nm optical signals into a single output. This is achieved through the use of specialized filters and beam combiners that merge the signals while maintaining their individual wavelengths. The result is a single high-capacity optical signal that can be transmitted over a single optical fiber.

Applications of 980/1550nm Fused WDM

This technology has a wide range of applications in the field of optical communication:

1. Long-Haul Optical Networks: 980/1550nm Fused WDM is commonly used in long-haul optical networks to transmit data over vast distances with minimal signal loss.

2. Cable Television (CATV) Networks: It is used in CATV networks to deliver high-definition video and audio signals to homes and businesses.

3. Data Centers: Data centers utilize 980/1550nm Fused WDM to manage the high volume of data traffic, ensuring fast and efficient data transmission.

4. Internet Service Providers (ISPs): ISPs benefit from this technology to provide high-speed internet services to their customers.

Conclusion

In the ever-evolving world of optical communication, 980/1550nm Fused WDM stands out as a critical technology that enhances data transmission capabilities. With its ability to combine the 980nm and 1550nm wavelengths, this technology has a significant impact on long-haul networks, data centers, cable television, and internet services. As we continue to demand faster and more reliable data transmission, 980/1550nm Fused WDM plays a crucial role in shaping the future of optical communication networks.

A Fundamental Guide to 2.0μm Single-Mode Fused Couplers

A 2.0μm single-mode fused coupler is an optical passive component designed to split off a portion of light for the purpose of optical monitoring and feedback. In this post, you will learn about the uses of 2.0μm single-mode fused couplers and a lot more.

What are the uses of 2.0μm single-mode fused couplers?

2.0μm single-mode fused couplers are immensely used in fiber amplifier power control and in transmission equipment for performance monitoring and feedback control.

Other important applications of 2.0μm single-mode fused couplers are EDFA, fiber laser, and testing instrumentations.

Apart from splitting optical signals between two fibers, 2.0μm single-mode fused couplers are also used to combine optical signals from two fibers into one fiber.

What is the significance of using fused fibers in an optical coupler?

A 2.0μm single-mode fused coupler is made of 2.0μm single-mode fiber in which only one type of light mode can propagate at a time. The term “fused” represents the construction of this coupler. It means the fiber used in it is designed by stretching, twisting, and fusing the two single-mode fibers so that their cores remain closer to each other.

The method used for fusion provides a simple, rugged, and compact construction to split and combine optical signals.

What is the difference between single-mode fused couplers and multimode fused couplers?

Multimode fused couplers are dependent on modes. In a multimode fused coupler, certain modes within one fiber can pass to the second fiber, while other modes don’t. It means the splitting ratio depends on which modes are excited within the fiber.

On the other hand, single-mode fused couplers transmit only one mode of light. Therefore, they don’t suffer from mode dependency. However, single-mode fused couplers are highly dependent on wavelength.

Even a difference in the wavelength of only 10nm can result in major changes in the splitting ratio in single-mode fused couplers.

Where can I buy 2.0μm single-mode fused couplers?

The 2.0μm Single-Mode Fused Couplers offered by DK Photonics are high-quality and highly reliable because they offer low levels of sensitivity to polarization. It enables them to more effectively monitor and manage optical networks. Besides, its 2.0μm single-mode fused couplers are known for offering low insertion loss, low polarization dependent loss, high stability, and excellent reliability.

At DK Photonics, you can buy 2.0μm Single-Mode Fused Couplers in a broad range of split ratios, lengths, and packaging and can also order these couplers with custom specifications.

Make the work easier with Optical Fused Coupler

Optical fused coupler is the most common and used technology in the IT sector to make the work easy for all. It is the invention in the department which works on the wavelength with the help of some scientific formulas. The fused coupler is used to transmit light waves in multiple paths with the help of the two or more inputs. It helps to complete the task simultaneously for more than one place with proper delivery of the waves. It is safe to use and never give any shock to the person. The working module of the fused coupler is straightforward which makes it easy for technicians to use.

The optical fused coupler works by partially removing the cladding from two or more fibers and bringing them in the close proximity. Once we remove the cladding and connect the fibers, the light couples from one fiber to another. The problem arises when there is a need to control the flow of the light waves. It is easy in the case of optical fused coupler because the remaining thickness of the cladding and the length of the region of proximity control the situation. The operation of the coupler is simple but going in details it depends upon the multimode and single mode of the fibers.

Details about the Multimode and single mode fibers in the optical fused couplers

Multimode fiber- The working module of the multimode fiber is large as the higher-order modes leaks into the cladding and in the core of the other fiber. The degree of the work and result depends upon the coupling zone and not on the wavelength.

Single mode fibers- The working module in the single mode fibers is the cyclic because it starts from one end and finishes on the same. The work starts from the one where the light enters in one fiber and gradually transfers completely to the other and bounces back. The overall module depends upon the coupler design and wavelength.

The designing and efficiency of the optical fused couplers depends upon the fibers and their working module. They functioning of the equipment is so great that it reduces the workload of the person and makes it easy along with many in and out benefits.

Benefits of the optical fused couplers

  • The use of the coupler is no more restricted to the electrical field; people are using the tool in many other departments like medical and household.
  • It is reliable to use due to its manufacturing pattern. It is safe for people of all age and easy to use. It never gives shock in any situation.
  • The stability of the coupler is very high as it is protective due to the cladding and fiber used in the manufacturing.
  • It works more with less input and delivers the best result for the people.

The technological advancements are for the benefit and comfort of the people and the optical fused coupler is one of them.

Going to Order PM Fused Couplers? First, Explore What Options You Have

Polarization-maintaining fused couplers are basically the components used to combine optical signals from two or more fibers into one fiber or to split optical signals between two or more fibers. They are made by fusing and tapering the polarization maintaining fibers together because it creates a simple, rugged and compact method of splitting or combining optical signals.

Generally, typical excess losses are as low as 0.2 dB, while split ratio tolerances vary between the range ±5% to ±0.5% at design wavelengths, based on the splitting ratio. These devices are bidirectional and offer low back reflection and insertion losses. Since they also function to split the signals, they are also widely called PM fused splitters.

Before checking options, let’s take a brief look at their features and applications.

Features of PM Fused Couplers

  • Low loss
  • Broad bandwidth
  • Excellent uniformity
  • High directivity
  • Compact design
  • Low cost
  • Available in a wide variety of wavelengths

Applications of PM Fused Couplers

  • Power Monitoring
  • Fiber Gyroscopes
  • Optical Amplifiers
  • Fiber lasers
  • Coherent communications

Configurations, Availability, and Customization 

Standard configurations are 1×2, 2×2, 1×3 (monolithic) and 1×4 (cascaded). A monolithic structure refers to that where all of the fibers are fused. On the contrary, a cascaded structure means that it combines several 2×2 splitters to produce a greater split count.

Various companies substitute a 2×2 coupler in place of a 1×2 coupler in the order, depending upon the availability because they can be used interchangeably without any issue. However, if you need greater split counts or different split ratios, it is always best to ask for the quotation by providing your customized specifications.

The fibers of fused couplers or splitters can be connectorized with all standard connectors such as FC, SC, ST, LC, etc. and imparted with finishes such as Super PC, Ultra PC, Angled PC [APC], etc.

PM fused couplers with a higher split ratio such as 10/90 and 5/95 are also readily available online. Such high split ratio is often requested by many customers to tap off a small amount of light for power monitoring. Reputed manufacturers use revolutionary technology to tap 1% to 3% of light in the fiber and directly couple it into the photodiode.

This helps in achieving minimal loss, high extinction ratio, and makes the device affordable. In general, companies use polarization maintaining fibers based on the PANDA fiber structure during manufacturing of PM components and patch cords. However, you can also request to use other PM fiber structures, for instance, bow tie.

If you are unable to find a PM fused coupler according to your specifications and requirements, there is no need to be disappointed as customization service is always available with experienced polarization maintaining fused coupler manufacturers. All you need to do is to make a request along with your specific needs.

How to Buy Optical Fused Coupler: All You Need To Do

Optical coupler is something most important for phonics devices and systems that are meant to combine or split light signals into fibers. The couplers can be either active or passive devices. The passive redistributes the signal without optical-to-electrical conversion while Active couplers split or combine the signals electronically.

When it comes to buying Optical Fused Coupler, there are some crucial factors that you should base your decision.

What you need them for

Before you start searching for Optical Fused Coupler suppliers, get to know where you are going to use them. As each coupler has different features which make them perfect for some certain application, if you know your need, you can choose the coupler equipped with the features essential to cater to your needs.

How they work

A basic fiber optic coupler has two points: N input ports and M output ports. These points will typically range from 1 to 64. But generally, these devices have four-port. How they work depends on the distributed coupling between two individual waveguides in close proximity, and this makes the power gradually transfers between modes which are supported by these waveguides.

 Four ports fiber optic coupler works like this. When light enters into the port 1, it splits into output ports which are port 3 and port 4.  And the port 2 functions in the same way. Sometimes, either port 1 or port 2 remains unused. In such case, the fiber optic coupler acts as a Y or T coupler.

As we have learnt that fiber optic coupler is used to couple or split light, so the coupler is also called fiber optic splitter. The term is used as it, the coupler, splits the light signal.

Where to buy

As you, now, know what you need a coupler for and how a coupler works, you are able to decide on the optic fused coupler. But where you buy it?

There are many fused optical manufacturers and suppliers in China. They make a wide range of couplers for various applications. But choose a manufacture that best suits you.

Check for their clients. This will help you know how they will cater to your needs. If they serve needs of businesses like yours, they are more likely to meet your expectation. Also, make sure if they provide customization. Because. There are many like DK Phontonics that also offer to customize the coupler to meet particular requirements. But make sure the prices offered are reasonable for the quality you get.

Fiber Optical Coupler: Design, Working, and Its Types

An optical coupler is one of the most commonly used devices in the telecommunication and electronic industry. Since its introduction, it has become an extremely important component in various phonic devices and systems. It is widely used for coupling or splitting light waves through waveguides or fibers and can be availed in the form of either active or passive devices. The main difference between active and passive couplers is that the passive coupler redistributes the optical signal without converting optical signals into electrical form. On the other hand, active couplers split or combine the signal electrically and make use of fiber optic detectors and sources for input and output.

A basic fiber optical coupler usually contains N input ports and M output ports and their value typically ranges from 1 to 64. However, in general, they are available with four ports and their functioning relies on the coupling distributed between two separate waveguides placed in close proximity. It results in a gradual power transfer between the modes that are supported by two waveguides.

The working principle is quite simple of these couplers. When the light enters from one of the input ports, it will be split between two output ports. The remaining second input port also functions in the same way. Sometimes, one of the input ports remains unused. In this case, the fiber optical coupler acts as a Y or T coupler (where Y or T depicts the form of transmission route).

Since fiber optical coupler can couple or split the light, it can be also be called fiber optic splitter. In fact, splitter name is used due to the function of device and coupler name is used for it its working principle. Nowadays, the most common types of fiber optical coupler are optical fused coupler and planar light wave circuit (PLC) splitter.

Optical Fused Coupler

Also called fused fiber optical coupler, it is formed on the basis of fused biconical taper (FBT) technology. Therefore, it is also known as FBT coupler. Generally, it is available to work on three different operating bandwidths such as 850 nm, 1310nm and 1550nm. However, it can also be ordered to manufacture for operating on other bandwidth values. Its remarkable features are low excess loss, low PDL, excellent reliability and high stability.

Planar Lightwave Circuit (PLC) Splitter

PLC splitter is especially designed to manage the optical power signals via splitting and routing. It offers reliable light distribution and is manufactured based on planar lightwave circuit technology. When compared with optical fused coupler which is available at lower cost, this splitter has a wider operating wavelength range varying from 1260nm to 1620nm and wider temperature range from -40ºC to +85ºC. It is also widely known for better uniformity, higher reliability, and smaller size.

These days, a typical fiber optical coupler is widely used to support FTTX (FTTP, FTTH, FTTC, and FTTN), passive optical networks (PON), local area networks (LAN), CATV systems, amplifying, monitoring systems and test equipment. Nonetheless, no matter for which application you need to use an optical fused coupler or PLC splitter, it is always beneficial to look for high quality devices, as their performance greatly varies with the material and their construction. So, when it comes to buying fiber optical coupler, you should always choose a copper-bottomed company.