Filter Wavelength Division Multiplexer (FWDM) Solution

What's FWDM?

FWDM, is known as Filter WDM, Filter-based WDM or Thin Film Filter WDM. As its name suggests, it is a WDM device based on Thin Film Filters (TFF) technology. As we know, optical thin-film filters typically consist of multiple alternating layers of high- and low-refractive-index material deposited on a glass substrate. They work based on the wavelength-dependent interference of light reflected or transmitted at the many interfaces between the layers. This filter technology took a revolutionary step forward as a result of developments driven by the challenging requirements of WDM optical communications systems. Using the Thin Film Filters to perform the Multiplexing or DeMultiplexing functions, FWDM can combine or separate light at different wavelengths in a wide wavelength range. Furthermore, they offer very low insertion loss, low polarization dependence, high isolation and excellent environmental stability. In addition, high power handling capability can be achieved through unique pigtail processing and high quality AR coating.

Types of FWDM

According to its application, FWDM covers the following wavelength windows commonly used in optical fiber systems:
850/1310nm FWDM - for multi-mode fiber communication, CATV and testing instrumentation 1310/1550nm FWDM - for WDM or DWDM optical communications 1480/1550nm FWDM - for high-power DWDM optical amplifier and EDFA 1510/1550nm FWDM - for DWDM multi-channel optical networks980/1550nm FWDM - for high performance DWDM optical amplifier and edfa amplifier 1310/1490/1550nm FWDM - for PON, FTTX and test instrument 1310/1550/1625nm FWDM - for testing active fibers in service 1310/1490/1550/1625nm FWDM - for combining or separating 1625nm channel with three triplex wavelength 1310nm, 1490nm and 1550nm so that 1625nm channel can be added into the existing triplex FTTH system

In addition, the C Band/L Band Wavelength Division Multiplexer which is used to combine or separate C band wavelength signals and L band wavelength signals in DWDM systems is comparable to one types of FWDMs because it is also based on Thin Film Filter Technology. The commonly used C Band/L Band Wavelength Division Multiplexers include the following types.

Features & Applications

FWDM includes the following features, and with these features, they are popular with people in many applications.

Features

Applications

Fiber-Mart FWDM Solution

FTTX FWDM Solution

Note: Fiber Diameter, connector type, fiber length are optional.

Example: FS-FWDM-T31/RD4955-9-SA-1

DWDM Red/Blue C Band Filter Solutions

Note: Fiber Diameter, connector type, fiber length, Channels, reflect band and pass band are optional.

Example: FSBR-C45000511

If you can't find the one fit for your requirement, please contact us. We can also offer some custom service for these products. In addition, we also offer CWDM Module and DWDM Module for your applications.

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