Filter-based WDM Device (FWDM)


  The filter wavelength division multiplexer(FWDM) series are based on environmentally stable thin film filters technology. The devices combine or separate light at different wavelength in a wide wavelength range.

  They offer very low insertion loss, low polarization dependence, high isolation and excellent environmental stability. These components have extensively used in EDFAs, Raman amplifier, fiber sensor system, WDM networks and fiber optics instrumentation.

Filter-based WDM Device (FWDM)

Filter-based WDM Device (FWDM)


  • Based on thin film filter technology
  • And high wavelength stability
  • Low polarization dependent loss
  • and high channel isolation
  • Flat and wide passband
  • Epoxy free optical path and excellent reliability
  • Telcordia GR-1221-CORE qualified and RoHS compliant 


Central Wavelength850/1310980/15501310/15501480/15501310/1490/1550C/L Band1310/16251550/1625
Passband Wavelength #1850±50980±401310±401450~14901310±40;1490±101528~15631310±401550±40
Reflective Band Wavelength #11310±501550±401550±401530~15801530~15801570~16101625±101625±10
Passband Wavelength #21310±501550±401550±401530~15801530~15801570~16101625±101625±10
Reflective Band Wavelength #2850±50980±401310±401450~14901310±40; 1490±101528~15631310±401550±40
Pass Channel Insertion Loss≤0.6 dB
Reflective Channel Insertion Loss≤0.4 dB
Pass Channel IsolationStandard ISO≥30 dB, High ISO≥40 dB
Reflective Channel IsolationStandard ISO≥13 dB, High ISO≥18 dB
Flatness≤0.3 dB
Directivity≥50 dB
Return Loss≥45 dB
PDL≤0.10 dB
Insertion Loss Temperature Sensitivity≤0.005 dB/°C
Wavelength Temperature Shifting≤0.002 nm/°C
Fiber Type50/125 or 62.5/125 Multimode fiber, SMF-28e Single mode fiber, HI1060 Fiber
Max. Power Handling≤500 mW
Operation Temperature-10~+70°C
Storage Temperature-40~+85°C
Package DimensionΦ5.5×34 mm(Φ0.25 fiber), Φ5.5×38mm(Φ0.9 fiber)

Note: 1. All parameters are for device without connectors.

2. Special specifications can be customized according to customer requirements. 


  • WDM system
  • CATV system
  • Telecommunication network system
  • Metro/Access networks
  • EDFA
  • Fiber optic instruments
  • Transmitters and fiber lasers
  • Single direction/Bi-direction transmission
  • Line monitoring
  • FTTX
FWDM Application

FWDM Application

Latest Blog

About Us

Why FTTH can save telecom cost

FTTH: saving money

【Our Goal】

Benefits our customers via Fiber Network (FTTH).

【FOT Telecom】

Your reliable fiber network equipment and service provider: Read More

Contact us

Email: sales@fiberoptictel.com Skype: fanny-lee2007Tel: +86-20-2209 8370
Add.:97th Science Avenue, Science Town,  Guangzhou, Guangdong, China