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arXiv · 0707.0206

Three-port beam splitters-combiners for interferometer applications

R. Schnabel·A. Bunkowski·O. Burmeister·K. Danzmann
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Abstract

We derive generic phase and amplitude coupling relations for beam splitters-combiners that couple a single port with three output ports or input ports, respectively. We apply the coupling relations to a reflection grating that serves as a coupler to a single-ended Fabry-Perot ring cavity. In the impedance-matched case such an interferometer can act as an all-reflective ring mode cleaner. It is further shown that in the highly undercoupled case almost complete separation of carrier power and phase signal from a cavity strain can be achieved.

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R. Schnabel, A. Bunkowski, O. Burmeister, K. Danzmann. 2007-07-02. Three-port beam splitters-combiners for interferometer applications. https://doi.org/10.1364/ol.31.000658

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