Polarization-Maintaining Fiber Optic Coupler

Polarization-Maintaining Fiber Optic Coupler
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Pictures and Schematic Diagram

The polarization maintaining fiber optical coupler, also called PM optic fiber coupler, is made with polarization-maintaining optic fiber which has been subjected to fused biconical taper process. It is a commonly seen fiber optic component on optical sensors and optical gyroscopes. Its coupling ratio can be decided by customers.

Features of PM Fiber Optic Coupler
Good Uniformity and Low Insertion Loss
Low Polarization Dependent Loss
Various Coupling Ratio
Excellent Environmental Stability
Outstanding Mechanical Properties
Stability: Telecordia GR-1221 and GR-1209 compliant

Applications of PM Fiber Optic Coupler
Fiber Optic Sensors
Passive Optical Networks(PON)
Local Area Networks (LAN)
CATV Systems
Fiber to the Subscriber (FTTx) applications
Test Equipment

Technical Specifications of Polarization-Maintaining Fiber Optic Coupler

Parameter1´2, 2´2
Operating wavelength(nm)780, 85098, 10601310, 1480, 1550
P gradeA gradeP gradeA gradeP gradeA grade
Coupling Ratio50/50, 30/70, 20/80, 10/90, 5/95, 3/97, 2/98, 1/99
Max. Excess Loss(dB)≤0.6≤0.8≤0.4≤0.6≤0.3≤0.4
Max. Uniformity(dB)≤0.8
Min. Extinction Ratio(dB)≥20 ≥18≥20 ≥18≥20 ≥18
Optical Return Loss(dB)≥50
Power Handling (mW )500
Max. Tensile Load(N)5
Operating Temperature (℃)-5~ 70
Storage Temperature (℃)- 40~ 85
Fiber TypePM PANDA Fiber(125/245um)
Package Dimension(mm)3×54 or longer
Coupling RatioInsertion Loss (dB)
780,850980 10601310, 1480, 1550
P gradeA gradeP gradeA gradeP gradeA grade
50/50≤3.8≤4.0≤3.6≤3.8≤3.4≤3.6
30/70/≤5.75/2≤6.1/2.1≤5.6/1.9≤5.75/2
20/80≤8.2/1.7≤8.5/1.9≤8.0/1.5 ≤8.2/1.7≤7.6/1.4≤8.0/1.5
10/90≤11.8/1.4≤12.0/1.6≤11.6/1.2≤11.8/1.4≤11.2/0.85≤11.6/1.0
5/95≤15.0/1.0≤15.2/1.2≤14.8/0.8 ≤15.0/1.0≤14.2/0.6≤14.8/0.8
3/97≤16.57/0.45≤17.12/0.6≤15.2/0.4≤15.8/0.5
2/98≤18.4/0.35≤18.9/0.5≤16.8/0.35≤17.4/0.45
1/99≤22.5/0.6≤22.8/0.8≤22.0/0.4≤22.5/0.6≤21.5/0.3≤22/0.4

Note: For fiber optic devices with connectors, the insertion loss is 0.3dB higher than those without connectors. Besides, their RL is 5dB lower, and ER is 2dB less. The keyway of the connector is aligned with the slow axis.

Order Information
COU-A-B-C-D-E-F-G-H-I-J

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