Project Description

Polarization Maintaining CWDM

The Polarization Maintaining Filter CWDM is characterized with low IL, high return loss, high extinction ratio and excellent environmental stability and reliability. They are ideal for polarization maintaining fiber amplifiers, CWDM network, and high speed communication system and instrumentation applications.

Features Applications
·       Low insertion loss

·       High Extinction Ratio

·       High channel isolation

·       High stability and reliability

 ·       Channel add / drop

·       CWDM network

·       Fiber optical amplifier

·       CATV Fiber Optic System

Performance Specifications

Parameter Unit CWDM
Operating Wavelength nm 1270,1290 etc.
Center Wavelength Accuracy nm ± 0.5
Channel Spacing GHz 20nm
Channel Pass band (@-0.5dB bandwidth) Min.) nm >13
Pass Channel Insertion Loss dB ≤0.9
Reflection Channel Insertion Loss dB ≤0.6
Channel Ripple dB < 0.3
Pass Channel Isolation dB >30
Reflection Channel Isolation (Non-adjacent) dB >15
Extinction Ratio @ 23℃ dB > 20
Directivity dB >55
Return Loss dB >45
Maximum Power Handling mW 300
Fiber Type – PM Panda Fiber
Operating Temperature °C 0 ~+65
Storage Temperature °C -40 ~+85
Package Dimension mm Φ5.5 x L35
  1. Above specifications are for device without connector, and the PM WDM device is both axis working. All parameters are tested at room temperature.
  2. For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower and ER will be 2dB lower. Power transmits through the connector less than 2W.The default connector key is aligned to slow axis.
  3. For >10W high power applications, we will use heat sink package, contact DK Photonics for details.
  4. If there is pulse application, please be sure to inform us of pulse energy and peak power.
  5. 1XN PM CWDM module is also available, please contact DKP.

Package Dimension

*Due to ongoing design improvements, the package size is subject to change. Please contact DK Photonics for confirmation.

Order information P/N: PMCWDM-①-②-③-④-⑤

When you inquire, please provide the correct P/N number according to our ordering information, and attach the appropriate description would be better. If need any connector, we do not recommend choosing a 250μm bare fiber pigtail.

① ② ③ ④ ⑤
Wavelength R- Wavelength Pigtails Diameter Fiber Length Connector
1270: 1270nm

1290: 1290nm

…

1590: 1590nm

1610: 1610nm

 A: 1270~1610

B: 1270~1450

C: 1470~1610

 25:250μm bare fiber

90:900μm Loose Tube

XX: Others

 05:0.5m

10:1.0m

15:1.5m

XX: Others

 00:None

FP: FC/PC

FA: FC/APC

SA: SC/APC

LP: LC/PC

LA: LC/APC

XX: Others

Part Number Example: PMCWDM-1590-C-90-10-FA

Description: 1590nm Polarization Maintaining CWDM, reflection wavelength 1470~1610nm,with 0.9mm OD loose tube, 1.0 fiber length, and FC/APC connectors at all ports.

Ordering Information for Custom Parts

If you need to customize other specifications, please provide detailed description for your requirement.

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