Hybrid ASE Light Source Optimization Using Unpumped EDF: Impact on Spectral Properties and Bias Instability in Fiber Optic Gyroscopes

Date

2025-8-21

Author

BOZKUŞ, NİGAR BUSE

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Amplified Spontaneous Emission (ASE) light sources with erbium-doped fiber (EDF) are commonly used in sensor technologies due to their high power, incoherent nature, wide bandwidth, and high wavelength stability. Improvements in the ASE light source directly enhance the gyroscope outputs, including bias instability. In this study, double-pass forward and double-pass backward configurations are combined and optimized by adding an unpumped erbium-doped fiber as a filter. The integration of a spectral filter into the configuration decreased the wavelength stability of the light source from approximately 14 ppm to nearly 6 ppm. Thermal tests at –25°C and +60°C revealed enhanced wavelength stability for the configuration with an EDF filter under extreme conditions. Furthermore, the average bias instability value is improved by 36% using the filtering technique in a single-axis tactical-grade gyroscope. These results demonstrate the significant role of the EDF filter in ASE performance and sensor outputs, providing valuable insights for optimizing light sources in IFOG systems to meet the system's specific needs.

Subject Keywords

Amplified Spontaneous Emission (ASE) Light Source, Erbium-Doped Fiber, Fiber Optic Gyroscope (FOG), Bias Instability

URI

https://hdl.handle.net/11511/115629

Collections

Graduate School of Natural and Applied Sciences, Thesis