Disturbance-free laser diode Sagnac interferometer using direct phase modulation |
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Authors: | Takamasa Suzuki Yasuhito Ban-nai Masato Shirai Osami Sasaki |
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Institution: | Niigata University, Faculty of Engineering, 8050 Ikarashi 2, Niigata 950-2181, Japan |
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Abstract: | We exploited the wavelength tunability of the laser diode of a phase-shifting Sagnac interferometer to realize disturbance-free measurements. The Sagnac interferometer is robust against mechanical disturbances because it has a common path configuration and requires no special references. An unbalanced optical path was introduced between p- and s-polarized beams to enable easy phase shifting by direct current modulation. The experimental results indicate that the proposed system is effective for performing precise disturbance-free measurements. |
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Keywords: | 07 60 Ly 42 55 Px 42 87 &minus d 42 87 Bg |
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