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Polarization Maintaining Fused Standard Coupler(PMC)

LightComm uses unique fusing technique and polarization maintaining fiber to build the polarization maintaining fused standard coupler (PMC).The coupling ratio could be selected according to customer’s request. It features low excess loss, small size and high polarization extinction ratio. PMC is widely used for optical sensors and optical gyro, optical amplifier.

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Polarization Maintaining Fused Standard Coupler(PMC)-V1.1.pdf


Specifications

1. Normal size PM Coupler Specifications:    

        Wavelength

Parameter

780,840±20nm

980,1064±20nm

1310,1480,1550±20nm

IL(dB)

@Central wavelength

CR

P

A

P

A

P

A

50/50

≤3.8

≤4.0

≤3.6

≤3.8

≤3.4

≤3.6

40/60

≤4.8/3.0

≤5.0/3.2

≤4.6/2.8

≤4.8/3.0

≤4.5/2.6

≤4.6/2.8

30/70

≤6.3/2.2

≤6.5/2.4

≤5.75/2.0

≤6.1/2.1

≤5.6/1.95

≤5.75/2.1

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

≤17.5/0.9

≤17.7/1.0

≤16.57/0.45

≤17.12/0.6

≤16.2/0.4

≤16.7/0.5

2/98

≤19.0/0.85

≤19.2/0.95

≤18.4/0.4

≤18.9/0.5

≤18.0/0.35

≤18.5/0.45

1/99

≤22.5/0.75

≤22.8/0.85

≤22.0/0.35

≤22.5/0.4

≤21.5/0.3

≤22/0.4

0.1/99.9

28~32 / ≤0.6

28~32 / ≤0.3

28~32 / ≤0.25

Connector Loss

0.8

0.5

0.3

ER(dB)

CR5%

20

18

20

18

20

18

5%≥CR1%

18

16

18

16

18

16

CR≤1%

Out of concern

Dimension: Φ×L(mm)

3×40 or longer (Standard:3×54)

1).The specifications are without connector. For devices with connectors, IL should be 0.3dB(1310~1550) or 0.5dB(980~1060) or 0.8dB(780~850) higher, ER should be 2dB lower.

2). The specifications are given for slow axis working only, if fast axis or both axis working needed, IL will be 0.3dB higher.

3).For device adding connectors, key aligns to slow axis if no special requirement.