论文信息 - Quadrature outputs from fiber interferometer with 4 x 4 coupler.

Quadrature outputs from fiber interferometer with 4 x 4 coupler.

A broad stripe waveguide of width W and length L acts as a self-imaging 4 x 4 directional coupler if L = NW(2)/lambda, where N is the effective index. When the arms of a fiber-optic Mach-Zehnder interferometer are connected to two input ports of this coupler, the powers at the four output ports vary in phase quadrature.

R Ulrich | R. Ulrich | T Niemeier | T. Niemeier

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