What is  the principle of Wavelength Division Multiplexing?

WDM is essentially a frequency division multiplexing FDM technology on the optical frequency, and each wavelength channel is realized through frequency domain division. Each wavelength channel occupies the bandwidth of a section of fiber. The difference from the past coaxial cable FDM technology is: (1) The transmission medium is different. The WDM system uses frequency division on optical signals, and the coaxial system uses frequency division on electrical signals. (2) On each channel, the coaxial cable system transmits an analog signal 4KHz voice signal, while the WDM system currently has a digital signal SDH2.5Gb/s or higher rate digital system on each wavelength channel.

Mechanical Fiber Optic Switch, WDM PD, Pigtail PD, TAP WDM Devices, Optical Isolator, Optical Circulator, etc., are the most commonly used WDM Related Equipment in construction of optical network.

Product Information:

1x2 Optical isolator, utilizes Faraday effect of Magneto optical crystal. it guides optical light in one direction and eliminates back reflection and back scattering in the reverse direction at any polarization sate. the unique manufacturing process and optical path epoxy-free design enhance the device's high power handling capability. the devices are characterized with high performance, high reliability and low cost.

Product Features:

• High Isolation
• Low Insertion Loss
• High Return Loss
• Optic Path Epoxy Free
• Low Polarization Sensitivity

Product Specification:

• Type: Single Stage
• Grade: Grade P
• Operating Wavelength Range (nm): ±15
• Type Insertion Loss (23 degree) (dB): 0.35
• Insertion Loss (Max.) (23 degree) (dB): 0.55
• Typical Isolation (min) (dB): 40
• Minimum Isolation (min) (dB): 30
• Max. PDL (dB):0.08
• Operating Wavelength (nm): 1310/1550/ customized
• PMD (ps): 0.25 (0.05 available upon request)
• Return loss (In/Out) (dB): 55/50
• Maximum Optical Power (mw): 500
• Maximum Tensile Load (N): 5
• Operating Temperature (℃): -5~75
• Storage Temperature (℃): -40~85

• Type: Single Stage
• Grade: Grade A
• Operating Wavelength Range (nm): ±15
• Type Insertion Loss (23 degree) (dB): 0.45
• Insertion Loss (Max.) (23 degree) (dB): 0.65
• Typical Isolation (min) (dB): 38
• Minimum Isolation (min) (dB): 29
• Max. PDL (dB): 0.1
• Operating Wavelength (nm): 1310/1550/ customized
• PMD (ps): 0.25 (0.05 available upon request)
• Return loss (In/Out) (dB): 55/50
• Maximum Optical Power (mw): 500
• Maximum Tensile Load (N): 5
• Operating Temperature (℃): -5~75
• Storage Temperature (℃): -40~85 

Product Applications:

• Fiber optic Amplifiers
• CATV Fiber Optic Links
• Fiber optic Systems Testing
• Fiber optic LAN Systems
• Telecommunications