PM CWDM

GracyFiber’s PM CWDM is a multi-channel device that separates or combines different wavelengths of light — from 1260nm to 1620nm — while keeping polarization unchanged. Built with precision-aligned PM fiber, it supports 2CH to 16CH configurations and works in telecom, sensing, laser systems, and quantum setups.

Available in compact modules or rack-mount formats, this component delivers low loss, high channel isolation, and stable performance — perfect for applications where both wavelength control and polarization matter.

Parameter		Unit		Value
Operating Wavelength		nm		1260~1620
Center Wavelength		nm		ITU+0 (1270/1290…1610), ITU+1(1271/1291…1611)
Channel Spacing		–		20
Channel Passband		Min	nm	±6.5
Channel		–		3Port		2CH	4CH	8CH	16CH
Insertion Loss		Max	nm	Pass	Ref	1.0	1.5	3.0	4.5
				0.8	0.6
Isolator	Adjacent	Min	nm	30 (Pass)		30	30	30	30
	Non-adjacent	Min	nm	15 (Ref)		40	40	40	40
Extinction Ratio		Min	nm	20		20	20	18	16
Operating Axis		–		Dual Axis or Pass Port Single Axis
Return Loss		Min	dB	50		45	45	40	40
Directivity		Min	dB	50
Power Handing		Max	mW	300
Fiber Type		–		PM 1300/ PM1550
Fiber Coating		mm		0.25 / 0.9/2.0/3.0mm Red/Blue  loose tube
Fiber Length		cm		100
Connector		–		FC/APC,FC/UPC，or Customized
Dimensions (HxWxD)	250μm Bare Fiber	mm		φ5.5×35
	900μm Loose Tube	mm		φ5.5×38
	2mm/3mm  Tube	mm		80×58×8,100×80×10,120×80×18
	Rack Mount	mm		155×129×29,482×250×44
Operating Temperature		°C		-5~65
Storage Temperature		°C		-40~85

Remark:

• Above specifications are for devices without the connectors.
• For devices with connectors, IL will be 0.3dB higher, RL will be 5dB lower, and ER will be 2dB lower.
• The PM fiber and the connector key are aligned to the slow axis, fast axis is blocked.

Part Number Configuration