Three-port beam splitters-combiners for interferometer applications

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.

References in corpus (2)

• Low-loss grating for coupling to a high-finesse cavity
• Input-output relations for a 3-port grating coupled Fabry-Perot cavity

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