Differential phase decoder in a polarized optical heterodyne interferometer

作者：Chou Chien^*; Ten Hui Kang; Tsai Chien Chung; Wu Jheng Syong

来源：Journal of the Optical Society of America A-Optics Image Science and Vision, 2008, 25(11): 2630-2635.

DOI：10.1364/JOSAA.25.002630

A differential-phase decoder (DPD) together with a polarization common-path optical heterodyne interferometer is set up. Based on this interferometric configuration and a novel balanced-detector scheme, the performance of the quantum-noise-limited differential-phase decoder is demonstrated and analyzed. The minimum-detectable differential phase is on the order of 10(-7) rad/ root Hz when a 2.5 mW He-Ne laser is used. Verified experimentally, the DPD is immune to the common-phase noise induced by an electro-optic phase modulator or by thermal disturbance within the interferometer. This signifies that the minimum-detectable differential phase can become 10(-8) rad/ root Hz if a 300 mW continuous wave laser is employed instead.

• 出版日期2008-11
• 单位中央民族大学; 中国科学院电工研究所