PM Coupler

Gracyfiber’s PM Fiber Coupler is a high-performance fused device engineered for precise optical power splitting while maintaining strict polarization stability. Available in 1×2 and 2×2 configurations, it supports a broad spectrum from 780 nm to 1550 nm, making it ideal for quantum optics, laser systems, telecom, and sensing applications.

Built with premium PM Panda fiber, GracyFiber’s coupler delivers exceptional signal integrity and low loss across various splitting ratios. With flexible packaging options and robust power handling capabilities, it ensures reliable performance in both laboratory research and demanding industrial environments where polarization fidelity is critical.

Parameter		Unit		Value
Port Type		–		1×2; 2×2;
Operating Wavelength		nm		1310，1550		780, 980，1064
Operating Bandwidth		nm		±30		±15
Grade		–		P	A	P	A
Typical Excess Loss		Max	dB	0.6	0.8	0.6	0.8
Extinction Ratio		Min	dB	20	18	20	18
Return Loss		Min	dB	55
Directivity		Min	dB	50
Power Handing		Max	W	0.5, 1, 3, 5
Fiber Type		–		PM Panda Fibe( 780/ 980/1300/1550)
Fiber Coating		µm		250 µm / 900 µm Blue loose tube
Fiber Length		cm		100
Connector		–		FC/APC,FC/UPC，or Customized
Dimensions (HxWxD)	250μm Bare Fiber	mm		φ3.0×45，φ5.5×35
	900μm Loose Tube	mm		φ3.0×54 ，φ5.5×38
	2mm/3mm  Tube	mm		90×20×10,100×80×10
Operating Temperature		°C		-5~65
Storage Temperature		°C		-40~85

Product	Splitting Ratio	Unit		Insertion loss
				Grade P	Grade A	Grade P	Grade A
Coupler 1X2, 2X2	50/50	dB		≤3.6	≤3.8	≤3.8	≤4.0
	20/80	dB		≤7.8/1.6	≤8.2/1.7	≤8.2/1.7	≤8.4/1.9
	10/90	dB		≤11.4/0.86	≤11.8/1.0	≤11.8/1.4	≤12.0/1.6
	5/95	dB		≤14.4/0.8	≤14.9/0.9	≤15.0/0.9	≤15.2/1.0
	1/99	dB		≤21.7/0.4	≤22.2/0.6	≤22.2/0.7	≤22.5/0.8

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