Abstract
An optical heterodyne differential phase decoder combines PM/AM converter and balanced detector in a polarized common-path optical heterodyne interferometer is presented. The performance of the decoder is demonstrated theoretically and experimentally. The minimum detectable phase 8.9 /spl times/ 10/sup -7/ rad/Hz/sup 1/2/ of proposed phase decoder is achieved with 0.5 mW of incident laser power. In principle, the minimum detectable phase can be further improved to 3 /spl times/ 10/sup -9/ rad/Hz/sup 1/2/, which in comparison with 9 /spl times/ 10/sup -10/ rad/Hz/sup 1/2/ developed by other group, in case of ideal optical heterodyne interferometer and 1 watt of incident laser power are employed.
Published Version
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