The high-power dual-stage optical isolator 780nm is a polarization-independent fiber element that enables all polarized light to propagate in one direction while blocking it in the opposite direction.
It is not possible to adjust the polarization of input light in many applications. In such instances, a polarization-independent optical fiber isolator with a wavelength of 780nm is required. 780nm optical fiber is a critical component that protects lasers, amplifiers, and ASE sources from instabilities caused by spurious back-reflected light.
Overview of the 780nm Optical Isolators
Low-power lasers benefit from the flexibility, convenience, and performance of the I-780-LM compact designs. I-780-LM covers the wavelength range of 770 to 790nm. A Faraday rotator constructed of LPE film is included in this design.
Due to the absorption of the Faraday rotator material, this type is only advised for low-power applications. For OEM requirements, metal-bonded or hermetic construction alternatives are available. I-780-LM has a standard wavelength of optimization of 780nm.
Applications
- Semiconductor Laser Modules
- Tunable Laser Modules
- Small Form Factor Laser Modules
Features
- Low Insertion Loss
- High Isolation
- Micro-Miniature Size
- Broad Bandwidth
- Wide temperature range
- Polarization alignment
Single Mode / Single Frequency Laser Diode, 780nm DFB, 4mW
The DFB laser is made with discrete-mode (DM) technology, which results in a low-cost laser diode with mode-hop-free tuneability, high SMSR, and a narrow linewidth.
These laser diodes come in a variety of wavelengths ranging from 776 to 784nm, making them ideal for Rb-based atomic clocks, Rubidium sensing, and interferometry applications.
The fiber-coupled butterfly package includes a TEC and a thermistor for precise temperature and wavelength control.
780nm for Rubidium-Based Atomic Clocks
These 780nm lasers operate reliably and without mode hop over a broad wavelength tuning range. These Rubidium-based atomic clocks and spectrometer lasers have a single longitudinal mode. The low linewidth output is ideal for high-performance applications in a variety of environments.
Polarization-Independent Dual-Stage Optical Isolator Fundamentals
The polarization dependence of dual-stage optical isolators using polarizers and a Faraday rotator is a severe problem. The insertion loss will rise as a result of this problem. As a result, optical isolators that are not polarization-dependent are particularly appealing for transmission systems.
By replacing the polarizers with polarizing splitters combiners, it is possible to achieve a polarization-independent design: they divide the input light into two orthogonal states of polarization that run through the Faraday cell separately to experience isolation and are recombined at the output.
Many applications in fiber optic systems necessitate high-power polarization-independent dual-stage optical isolators, which allow inputs with any polarization direction to flow through without PDLs while isolating back reflections (return lights).
The high-power dual-stage optical isolator is a vital component in optical systems. High-power dual-stage optical fiber isolators are used to ensure that laser transmitters and amplifiers are stabilized, and that transmission performance is maintained.