Mini-Coupler Spec Sheet

Dimensions Unpackaged:

0.591" x 0.100" x 0.100" (Length x Width x Height)

(15.0mm x 2.54mm x 2.54mm)

Wavelength:

Available from 2.04 to 0.488 um

Coupling Ratio:

Anything between 0.1 and 99.9%

Polarization Isolation:

Up to -29 dB

Excess Loss:

Typically < 0.1 dB

Return Loss (Back reflection):

Typically < -70 dB

Wavelength Dependence:

Generally in a 3 dB coupler, a 1% change in wavelength will produce a 0.21 dB change in insertion loss (see following graph). A higher ratio coupler will have a flatter response. If using port A as the input, an increase in wavelength will decreawse the amount of light exiting through output X (through fiber) and increase the amount of light exiting through output Y (coupled fiber).