Polarization Maintaining Fused Coupler

	Features		Applications
	Low Excess Loss & Insertion Loss High Power Handling High Stability and Reliability High Extinction Ratio Operating On Both Fast and Slow Axes		Power Monitoring Coherent Communication Fiber Gyroscope Fiber Laser Fiber Amplifier Instrumentation

Performance Specifications

Parameter	Specifications
	P Grade	A Grade	P Grade	A Grade	P Grade	A Grade
Center Wavelength	780, 850nm		980, 1064nm		1310, 1550nm
Bandwidth	± 20nm		± 20nm		± 20nm
Excess Loss (Tap.)	0.6dB	0.8dB	0.6dB	0.8dB	0.2dB	0.3dB
Excess Loss (Max.)	≤ 0.8dB	≤ 1.0dB	≤ 0.8dB	≤ 1.0dB	≤ 0.4dB	≤ 0.6dB
Extinction Ratio* (Min.)	≥ 18dB	≥ 16dB	≥ 18dB	≥ 16dB	≥ 20dB	≥ 17dB
Thermal Stability	≤ 0.005dB/℃
Return Loss (Min.)	≥ 55dB
Directivity (Min.)	≥ 50dB
Optical Power (Continuous Wave)	2W
Operating Temperature	-40 to +85°C
Storage Temperature	-40 to +85°C
Fiber Type	Pand fiber
Pigtail Type	250μm bare fiber		900μm loose tube		900μm/2mm/3mm loose tube
Package Dimensions	3.0mm×54mm		3.0mm×70mm		L98mm x W14mm x H8.5mm

Coupling Ratio & Its Tolerance

Coupling Ratio	1/99%	2/98%	5/95%	10/90%	20/80%	30/70%	40/60%	50/50%
Coupling Ratio Tolerance (λc) (Max.)	± 0.2%	± 0.3%	± 0.5%	± 1.0%	± 2.0%	± 2.0%	± 2.5%	± 3.0%

Note:

1. RL is 5 dB lower, ER is 2 dB lower for each connector added. Connector key is aligned to slow axis.

2. The optical power is 1 W only for connector added.

3. Data tested at central wavelength only.

4. Slow Axis working with specified coupling ratio; however, Fast Axis is not blocked.

* ER data listed in the table are for the ports with coupling ratio greater than 10%. It will be 2 dB lower for a tap port with coupling ratio between 1-10%. For 1% tap port, ER is not considered.