Wavelength Division Multiplexer

Standard WDM 

Standard WDM is working at 1310/1550nm, its standard isolation is 18dB, its high isolation is 30dB, and its ultra-high isolation is 40dB. 

Pump WDM 

The fiber amplifier WDM enables the combination of pump and signal in C-band 980nm pumped Erbium Doped fiber Amplifiers (EDFA). The uniquely low insertion loss of this component, across the whole C-band, enables manufacturers to achieve the lowest noise figure in their amplifiers. Similarly low loss in the 980nm window maximizes the pump power reaching the Erbium fiber. Applications include EDFAs for dense WDM systems, pre and post amplifiers and optical noise sources. 980/1550nm WDMs are manufactured using optical fiber with numerical aperture intermediate between that of signal and gain fiber to enable mode-field matching and bend-insensitive single mode operation at both wavelengths. 

Monolithic High Isolation WDM 

The isolation of regular 1310/1550nm WDM couplers are usually about 16-17dB within +/-15nm bandwidth. We offer monolithic HWDM coupler with isolation higher than 30dB.The HWDM can replace the high isolation WDM coupler modules. It features high isolation and this compact package size. 

Filter WDM 

It includes C+L band Filter WDM, C band supervisory channel WDM, L band supervisory channel WDM, C band Red pass WDM, L band red pass WDM, 1310/1550nm/1625nm filter WDM

• Mini WDM works at 980/1550nm or 980/1590nm or 1310/1550nm, it is available on 2.4x30mm or 2.4x25mm.
• 1310/1550nm High Isolation Monolithic WDM  with isolation higher than 30dB.The HWDM can replace the high isolation WDM coupler modules. It features high isolation and this compact package size.
•  Filter WDM FWDM-356   It is passing at 1310nm and 1550nm, reflecting at 1625nm. Its isolation is 15dB more at 1625nm and 30dB more at 1310/1550nm.
•  Filter WDM FWDM-635  This standard unit is passing at 1625nm and reflecting at 1310/1550nm. Its isolation is 25dB more at 1625nm and 12dB more at 1310/1550nm.
• S-WDM Special wavelength division multiplexer has low excess loss and high isolation such as 980/1053nm, 980/1064nm, 1064/1550nm, 1550/1625nm coupler.It is for EDFA, Optical sensors.
• RCFWDM Series RC fiber Filter Wavelength Division Multiplexer series are based on enviromentally 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. High power handling capability can be achieved through unique pigtail processing and high quality AR coating. These components have beed used in compact EDFAs, Sensors, and other fiberoptic communication equipments required compact optical circuits.
• MWDM 59  It is passing at 1550nm and reflecting at 980nm,its isolation is 18dB more at 980nm and 30dB more at 1550nm.
• MWDM 45/54  It is available on 1480 passing/1550nm reflecting or 1550nm passsig/1480nm reflecting. Its isolation is 12dB more at the reflecting channel and 30dB more at the passing channel.
• Multimode 850/1310nm MWDM (Standard Isolation) It is available on 1310nm passing/850nm reflecting or 850nm passing/1310nm reflecting. Its isolation is 12dB more on reflecting channel and 30dB more on passing channel.
• Multimode 850/1310nm MWDM (High Isolation)  It is available on 850nm passing/1310nm reflecting or 1310nm passing/850nm reflecting, its isolation on reflecting and passing channel are both 45dB more.
• L-Band Supervisory Channel (1620~1630nm) MWDM It is passing at 1620-1630nm and reflecting at 1570 to 1605nm. Its isolation is 12dB more at this reflecting channel and 30dB more at this passing channel.
• L-Band Red/Blue Pass MWDM It is passing at 1589 ~ 1603nm (or 1570 ~ 1584nm) and it reflects at 1570 ~ 1584nm (or 1589 ~ 1603nm). Its isolation is 12dB more at this reflecting channel and 30dB more at this passing channel.
• C-Band Supervisory Channel MWDM it is passing at 1500 ~ 1521nm and reflects at 1529~1563nm. Its isolation is 12dB more at this reflecting channle and 30dB more at this passing channel.
• C/L Band MWDM It is available on 1570nm passing/1563nm reflecting and 1563nm passing/1570nm reflecting. Its isolation is 12dB more at this reflecting channel and 30dB more at this passing channel.
• C-Band Red/Blue Pass MWDM It is passing at 1500 ~ 1521nm and reflecting at 1529~1563nm, its isolation is 12dB more at this reflecting channel and 30dB more at this passing channel.
• 1x2 Triplexer WDM Coupler for FTTH It is available on 1310/1490nm passing/1550nm reflecting or 1310/1490nm reflecting/1550nm passing or 1310/1550nm reflecting/1490nm passing. Its isolation is more than 15dB or 40dB on request.
• Pump WDM-1480/1550nm The 1480nm pump WDMs enable the combination of pump and signal in 1480nm pumped Erbium Doped fiber Amplifiers (EDFA). Both C-band and L-band versions of this component are available, providing a cost-effective alternative to filter based WDMs, particularly for single channel amplification. It is available on 1x2 or 2x2.
• Pump WDM-980/1550 The fiber amplifier WDM enables the combination of pump and signal in C-band 980nm pumped Erbium Doped fiber Amplifiers (EDFA). The uniquely low insertion loss of this component, across the whole C-band, enables manufacturers to achieve the lowest noise figure in their amplifiers. Similarly low loss in the 980nm window maximizes the pump power reaching the Erbium fiber. Applications include EDFAs for dense WDM systems, pre and post amplifiers and optical noise sources. 980/1550nm WDMs are manufactured using optical fiber with numerical aperture intermediate between that of signal and gain fiber to enable mode-field matching and bend-insensitive single mode operation at both wavelengths. It is available on 980/1590nm and 980/1550nm, its configuration is 1x2 or 2x2.
• 1310/1550nm WDM, high-isolation 1310/1550nm Fused WDM is with 30dB or 45dB isolation.
• 1310/1550nm WDM, tube type, 18dB Standard 1310/1550nm WDM unit is in 18dB isolation, with 1x2 or 2x2 configuration.