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24 November 2023 Filtering characteristics of external cavity diode laser based on angular spectrum theory
Zhenying Yang, Jiani Ge, Zhigang Han, Shunfan Yang, Hua Shen, Rihong Zhu
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Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129352A (2023) https://doi.org/10.1117/12.3007574
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China
Abstract
A physical model of the Littman configuration external cavity diode laser is established based on the angular spectrum theory, and the external cavity transfer function is derived. The wavelength-dependent coupling efficiency is calculated, obtaining the external cavity filtering envelope. Based on this model, we numerically simulate the filtering envelope with different parameters. The simulation shows that the filtering bandwidth of the external cavity narrows with the decrease of the collimator focal length. The wave aberrations of the collimator lens seriously degrade the peak reflectivity and filtering bandwidth of the external cavity. The impact of the external cavity length and the beam misalignment on the filtering function is studied, providing a theoretical basis for the error analysis of the optical path design.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Zhenying Yang, Jiani Ge, Zhigang Han, Shunfan Yang, Hua Shen, and Rihong Zhu "Filtering characteristics of external cavity diode laser based on angular spectrum theory", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129352A (24 November 2023); https://doi.org/10.1117/12.3007574
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KEYWORDS
Tunable filters
Optical filters
Electronic filtering
Semiconductor lasers
Diffraction gratings
Complex amplitude
Phase distribution
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