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Miao Yan

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Proceedings Article | 4 April 2023 Paper

Double pass broadband ASE light source with real-time wavelength adjustment

Zhisheng Zheng, Wei Luo, Fei Hui, Miao Yan, Wenlong Zuo

Proceedings Volume 12617, 126177E (2023) https://doi.org/10.1117/12.2666842

KEYWORDS: Light sources, Fiber optic gyroscopes, Erbium, Ions, Gyroscopes, Optical fibers, Signal attenuation, Fiber lasers, Reflection, Erbium lasers

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High Precision Fiber Optic Gyroscope (HPFOG) is widely used in aviation, navigation, aerospace and other fields. Its development is of great strategic significance to a country's industry, national defense, science and technology. High precision fiber optic gyroscope usually uses a wide spectrum ASE light source to suppress the non heterotropic noise caused by Kerr effect. The gyro accuracy has been greatly improved. It has been reported that high-precision gyroscope reaches the reference level (ppm °/h). Compared with the laser gyro, the scale performance of the fiber optic gyro is still far from that of the laser gyro. The high-precision long endurance inertial navigation system has high requirements on the scale factor performance of the gyro. The scale error of the fiber optic gyro severely limits its application in the high-precision long endurance inertial navigation. The average wavelength of the light source is the main factor affecting the scale stability of the fiber optic gyroscope. This paper studies a double pass broadband ASE light source with real-time wavelength adjustment. By adding reflective light reflectivity control devices on the basis of the traditional reflective double pass broadband light source, the real-time accurate adjustment of the light source wavelength is realized, and then the scale factor of the high-precision fiber optic gyroscope is compensated and controlled to effectively improve the stability of the scale factor.

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