Narrowing the linewidth to a desired value with a reflecting volume-Bragg-grating (RVBG) for high-powered LDs

Liangping Xue; You Wang; He Cai; Guofei An; Wei Zhang; Jie Zhou; Hongyuan Wang; Juhong Han; Zhigang Jiang; Ming Gao

doi:10.1117/12.2183408

4 May 2015 Narrowing the linewidth to a desired value with a reflecting volume-Bragg-grating (RVBG) for high-powered LDs

Liangping Xue, You Wang, He Cai, Guofei An, Wei Zhang, Jie Zhou, Hongyuan Wang, Juhong Han, Zhigang Jiang, Ming Gao

Author Affiliations +

Proceedings Volume 9543, Third International Symposium on Laser Interaction with Matter; 95431K (2015) https://doi.org/10.1117/12.2183408
Event: Third International Symposium on Laser Interaction with Matter, 2014, Jiangsu, China

Abstract

In recent years, reflecting volume-Bragg-gratings (RVBGs) have been considered as the perfect elements to narrow the spectrum with highly adjustable parameters. In fact, the effects of narrowing the linewidth of high-powered LDs are determined by the parameters such as the grating thickness, refractive index modulation, and grating spatial frequency. By use of the theoretical regime, the relationships between the effective diffraction efficiency and these parameters of a RVBG have been systematically investigated to narrow the linewidth to a desired value. Although the results reveal that a higher effective diffraction efficiency may be achieved by adopting three parameters mentioned above with higher values, by considering the difficulties and confinement in production process of a RVBG, the characteristic parameters should be carefully selected as some appropriate values. From the evaluation, one also understands that the narrow linewidth of a RVBG-coupled LD and the high effective diffraction efficiency cannot be arbitrarily realized at the same time for a real case. The conclusions are thought to be valuable in construction of a practical narrow linewidth LD system.

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Liangping Xue, You Wang, He Cai, Guofei An, Wei Zhang, Jie Zhou, Hongyuan Wang, Juhong Han, Zhigang Jiang, and Ming Gao "Narrowing the linewidth to a desired value with a reflecting volume-Bragg-grating (RVBG) for high-powered LDs", Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 95431K (4 May 2015); https://doi.org/10.1117/12.2183408

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KEYWORDS

Diffraction

Diffraction gratings

Spatial frequencies

Refractive index

Modulation

Semiconductor lasers

Fiber Bragg gratings

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