This product is a 16CH 200G Oband PM DWDM Module (16-channel 200G O-band polarization-maintaining DWDM multiplexing/demultiplexing module), operating in the wavelength range of 1260–1380 nm. It provides 16 equally spaced 200G DWDM channels in the O-band, with a center wavelength covering 1295.56–1312.58 nm. Each channel has a passband of λc±0.2 nm and an in-band ripple of <0.5 dB, combining low insertion loss, high channel isolation, and good channel consistency. The module uses Corning PM-1310-U25D polarization-maintaining fiber and LC/UPC connectors, with connector keys aligned to the slow axis, suitable for integration into various O-band polarization-maintaining DWDM systems.

• Low Insertion Loss, Ample Link Budget
  The insertion loss of the 16 channels gradually decreases from ≤4.5 dB in the Mux direction to ≤1.0 dB in the CH16 direction, and from ≤1.0 dB to ≤4.5 dB in the Demux direction. The overall link loss is <5.5 dB, while the in-band ripple is controlled within 0.5 dB, which helps maintain good OSNR and power margin, making it suitable for medium- to long-distance or multi-stage amplification applications.
• High Channel Isolation, Extremely Low Crosstalk
  Isolation between adjacent channels is >25 dB, and isolation between non-adjacent channels is >35 dB, effectively suppressing crosstalk between channels; port return loss is >45 dB, and directivity is >50 dB, significantly reducing the impact of reflections and port coupling on system stability and ensuring signal quality during multi-wavelength parallel transmission.
• Polarization-Maintaining Design with Excellent Polarization Characteristics
  Utilizing Corning PM-1310-U25D panda-type polarization-maintaining fiber, the device extinction ratio is >16 dB, and the connector keying is aligned with the slow axis, ensuring a stable and controllable polarization state within the polarization-maintaining system. This is more suitable for coherent detection, interferometry, and polarization-sensitive applications.
• Good Channel Consistency and Easy System Calibration
  The insertion loss of each channel is distributed according to a wavelength gradient with a clearly defined control range. The differences between channels are small, facilitating unified calibration and power compensation at the system level, reducing the workload of subsequent software calibration and maintenance.
• High Reliability and Standard Compliance
  The module can withstand a maximum optical power of <300 mW and operates at a temperature of 0～+65 ℃. Combined with high-reliability filtering technology and module packaging, it ensures stable long-term online operation. The overall design meets Telcordia and RoHS standards, making it suitable for mass deployment in both operational and engineering projects.

• Dimensions
  Module Housing Dimensions: 120 * 80 * 18 mm ABS box package, suitable for installation in 1U/2U chassis or module trays.
• Ports and Structure
  Port Configuration: 1 * COM common port + 16 * DWDM channel ports (CH1–CH16), as shown in the structure diagram on page 2 of the datasheet. The COM port multiplexes/demultiplexes 16 wavelengths from 1295.56 to 1312.58 nm.
  Port Type: Mux / Demux configurations are available, supporting individual Mux modules or Demux modules, or they can be used in pairs.
• Fiber Optics and Connectors
  Fiber Type: Corning PM-1310-U25D Polarization-Maintaining Fiber
  Pigtail Sheath: 0.9 mm Blue Loose Tube, for easy identification and chassis cabling
  Standard Pigtail Length: 1 m (Customizable upon request)
  Standard Connector: LC/UPC, connector key alignment with the slow axis for consistent polarization reference across the entire system; other interface types can be customized for projects requiring specific conditions.
• Power and Environmental Conditions
  Maximum Input Optical Power: <300 mW
  Operating Temperature: 0～+65 ℃
  Storage Temperature: -40～+85 ℃

• Broadband networks
• PON networks
• CATV system
• DWDM system