Polarization Maintaining Fused Coupler
Description:
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OF uses FBT technique with polarization maintaining (PM) fiber to build the PM coupler (PMC). The coupling ratio can be easily adjusted according to customer’s request. It features low excess loss, small size and high polarization extinction ratio (PER). PMC is widely used for optical sensors and optical gyro..
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Features:
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l Low insertion loss and excess loss
l Excellent stability and reliability
l Working wavelength and coupling ratio flexible adjusted
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Applications:
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l Fiber gyro
l Fiber Sensors
l PM amplifier
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Specifications：
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Parameters
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P grade
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A grade
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P grade
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A grade
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EL (dB)
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Package dimension (mm)
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Wavelength
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Coupling ratio (CR)
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Insertion loss (dB)
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PER (dB)
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980, 1060±15
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50/50
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≤3.6
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≤3.8
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≥20
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≥18
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≤0.4(P)
≤0.6(A)
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3×54 or customize
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20/80
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≤8.0/1.5
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≤8.2/1.7
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10/90
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≤11.6/1.2
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≤11.8/1.4
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5/95
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≤14.8/0.8
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≤15.0/1.0
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1/99
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≤22/0.4
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≤22.5/0.6
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1310, 1480, 1550±15
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50/50
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≤3.4
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≤3.6
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≥20
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≥18
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≤0.3(P)
≤0.4(A)
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3×54 or customize
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20/80
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≤7.6/1.4
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≤8.0/1.5
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10/90
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≤11.2/0.85
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≤11.6/1.0
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5/95
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≤14.2/0.6
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≤14.8/0.8
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1/99
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≤21.5/0.3
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≤22/0.4
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Remark:
*Above specifications are w/o connector.
*For devices with connectors, specification please refer to PM patchcord spec, key aligned to slow axis.
*If tap port coupling ratio is ≤ 5%, ER will be 2dB lower; for ≤1% tap port, ER is out of concern.
* For wide band PM coupler is only available for 1310, 1550 type, please contact with sales for detail spec.
