Source module with IOC and detectors for low cost fiber optic gyro

Kuniyoshi Watanabe; Ryuichiro Sasaki; Sadaomi Sakuma; Shigeru Nakamura; Takeshi Hojo

doi:10.1117/12.258193

12 November 1996 Source module with IOC and detectors for low-cost fiber optic gyro

Kuniyoshi Watanabe, Ryuichiro Sasaki, Sadaomi Sakuma, Shigeru Nakamura, Takeshi Hojo

Proceedings Volume 2837, Fiber Optic Gyros: 20th Anniversary Conference; (1996) https://doi.org/10.1117/12.258193
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The prototype light source module with integrated-optic-chip and photo-detectors, which is applicable to a small-size and low-cost fiber optic gyro has been investigated. The module is designed so that al optical parts which are necessary to form the reciprocal configuration of the interferometric fiber optic gyroscope (I-FOG) are built in a single package except a sensing coil by using free-space optical coupling method. Reducing the number of optical components makes size smaller and assembling-cost lower. The module with an amplifier for the signal-photo-detector is contained in a single cylindrical-case. The cylindrical figure is chosen by considering the benefit that the module can be located inside any sensing coil. In order to confirm the performance of the low-cost I-FOG, a gyro test was carried out by the module connected to the single-mode fiber coil of 300 m in length. We obtained bias stability less than 0.5 deg/hr rms from this test.

Citation Download Citation

Kuniyoshi Watanabe, Ryuichiro Sasaki, Sadaomi Sakuma, Shigeru Nakamura, and Takeshi Hojo "Source module with IOC and detectors for low-cost fiber optic gyro", Proc. SPIE 2837, Fiber Optic Gyros: 20th Anniversary Conference, (12 November 1996); https://doi.org/10.1117/12.258193

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