Tag: Passive Optical Network

Introduction of FBG Filter Embedded Adaptor-FBG filters for live network monitoring using in FTTH

Introduction of FBG Filter Embedded Adaptor-FBG filters for live network monitoring using in FTTH

FBG Filter Embedded Adaptor
FBG Filter Embedded Adaptor
FBG Filter Embedded Connector
FBG Filter Embedded Connector

FBG filters for FTTx applications are reflective filters integrated in the LC or SC adapters, which reflect the 1625 nm wavelength and transmit all other (i.e. 1310, 1490 and 1550 nm). They can be used to monitor live network utilizing OTDR operating at 1625 or 1650 nm. End-to-end OTDR measurements from OLT to ONT are typically difficult due to the high point insertion loss introduced by the splitter and due to the required very good spatial resolution. The use of the 1625 nm reflectors is an efficient and cost-effective way of reducing the required dynamic range of the OTDR. The 1625 reflectors  are currently considered the best way of implementing  real time end-to-end (OLT to ONT) monitoring of the optical layer in live FTTx networks.

FBG filter

More information for the FBG Filter Embedded Connector

DK Photonics – www.dkphotonics.com  specializes in designing and manufacturing of high quality optical passive components mainly for telecommunication, fiber sensor and fiber laser applications,such as PLC Splitter, WDM, FWDM, CWDM, DWDM, OADM,Optical Circulator, Isolator, PM Circulator, PM Isolator, Fused Coupler, Fused WDM, Collimator, Optical Switch and Polarization Maintaining Components, Pump Combiner, High power isolator, Patch Cord and all kinds of connectors.

What is Passive Optical Network?

Passive Optical Network (PON) is a form of fiber-optic access network that uses point-to-multipoint fiber to the premises in which unpowered optical splitters are used to enable a single optical fiber to serve multiple premises. A PON system consists of an OLT at the service provider’s central office and a number of ONU units near end users, with an ODN between the OLT and ONU. PON reduces the amount of fiber and central office equipment required compared with point-to-point architectures.

PON Optical Network
Passive Optical Network (PON)

The most obvious advantage of the PON network is the elimination of the outdoor active devices. All the signals processing functions are completed in the switches and the user premises equipment. The upfront investment of this access methods are small, and the most funds investment is postponed until the user really access. Its transmission distance is shorter than the active optical access system. The coverage is also smaller, but it is low cost, no need to set the engine room, and easy to maintain. So this structure can be economically serve for the home users.

PON Development Background

Seen from the entire network structures, due to the larger numbers of laying optical fibers, and widely applications of DWDM technology, the backbone network has been a breakthrough in the development. The same time, due to advances in Ethernet technology, its dominant LAN bandwidth has increased from 10M, 100M to 1G or 10G.. At present, what we are concerned about is the part between the network backbone and local area networks, home users; this is often said that the “last mile”, which a bottleneck is. Must break this bottleneck, may user in the new world of the online world. It is as if in a national highway system, trunk and regional roads have been built in the broad high-grade highway, but leads to the families and businesses of the door was still narrow winding path, the efficiency of the road network cannot play.