LGX Box FWDM Filter for 1310 1550 1650nm Wavelengths Robust Design
for Seamless Integration in Network Upgrades
FWDM Filter ( Filter Wavelength Division Multiplexer )
Bypass Filter Chassis: This is bassically made up of 2 FWDM filter
where the reference leg of both the filters are spliced together.
The very function of a bypass filter is to bypass 1650nm as per
below images.
FTTX Filter WDM module extensively used in EDFA, Raman amplifiers,
WDM networks, and fiber optics instrumentation is based on Thin
Film Filter (TFF) technology. The device combines or separates
light at different wavelengths in a wide wavelength range. It can
expand the capacity of a single fiber to achieve bi-directional
communication so that widely used in optical network upgrades and
expansion, or introduce new comprehensive business, etc.
HJY provides filter-based wavelength division multiplexing (WDM)
filter devices that are customized to the particular wavelength
bands for your special applications. As you might know, the GEPON
system itself works on 1310/1490, so the CATV signal here is
delivered over the same fiber using 1550nm, and FWDM is a place
where all this get's "mixed".
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 networks.
980/1550nm 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.
Dimensions (mm)
Product Parameters
| Central Wavelengths | 1310,1550,1650nm | Technology | TFF (Thin Film Filter) |
| Passband | 1310+-25nm and 1550+-25nm | Reflection | 1650+-20nm |
| Passband ripple | ≤0.30dB | IL @ Passband | ≤0.60dB |
| Reflection band ripple | ≤0.20dB | IL @Reflection | ≤0.40dB |
| Transmission isolation (adj channel) | ≥30dB | Transmission isolation (non-adj channel) | ≥50dB |
| Reflection isolation | ≥15dB | Polarization dependent loss | ≤0.1dB |
| Polarization mode dispersion | ≤0.2ps | Thermal Stability | ≤0.005N |
| Directivity | ≥50dB | Return loss | ≥45dB |
| Optical power handling | ≤500mW | Temperature | Operating -40 to 85°C
Storage -40 to 85°C |
| Fiber type | SMF-28e | Package dimension | LGX Box 128*118*44mm |
Application Diagram
The Filter WDM system uses a Multiplexer at the transmitter to
combine several wavelengths together, each one carry different
signal with bite-rate up to 10G and a demultiplexer at the receiver
to split them apart. Due to its low insertion loss, low
polarization dependence and high isolation, the filter is widely
used in CATV system, FTTx and PON system, Fiber Communication, Test
Instrument and etc.
Ordering Information:
| HJY-FW | Package | Connector Type | U/A | Wavelength | Fiber Type | Fiber Length | Ports Type |
| FW | S: Steel B: ABS BOX Others | 0: No connector 1: LC 2: SC 3: FC 4: Others | U: UPC A: APC | T: Transmission wavelength range (nm) R: Transmission wavelength range (nm) | 9: 0.9mm
20:2.0mm
30:2.0mm Others | 005: 0.5+/-0.1m 01: 1.0+/-0.1m others | Com Reflect
Pass |
Note.
1) All the specifications are based on the devices without
connectors, and guaranteed over wavelength, polarization and
temperature.
2)PMD and chromatic dispersion values are guaranteed by design.
3) Specifications are subject to change without notice
