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A Novel Method to Calculate the Initial Phase Difference between the Two Fibre Arms of Laser Homodyne Interferometer |
| LUO Hong-E;TIAN Xiao-Jian;GAO Bo;LI Liang;WU Ge;CAO Liang |
| College of Electronic Science and Engineering, State KeyLaboratory of Integrated Optoelectronics, Jilin University, Changchun 130012 |
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LUO Hong-E, TIAN Xiao-Jian, GAO Bo et al 2007 Chin. Phys. Lett. 24 101-103 |
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Abstract We suggest a novel method to calculate the initial phase difference between two fibre arms of a laser homodyne interferometer. Put the two fibre arms in a temperature controller, whose short term stability is 0.02°C (measured in an hour), then measure the interference photocurrent and the photocurrents from the two fibre arms at a fixed temperature. With these three photocurrents we can calculate the value of the initial phase difference. We set up a simple laser homodyne interferometer to test the theory. The experimental results are repeatable and the measurement precision is about 0.04°. It is theoretically and experimentally proven that this method is potentially easy and practical.
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| Keywords:
42.25.Hz
42.15.Eq
42.30.Rx
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Published: 01 January 2007
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