Theoretical study on feedback characteristics of double volume Bragg gratings

Li Zhiyong; Tan Rongqing; Xu Cheng; Li Lin

doi:10.3788/HPLPB20132507.1643

Volume 25 Issue 07

May 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(07): 1643-1647

Han Feng, Lu Xicheng, Liu Yu, et al. Designing microwave effect experiment based on Bayesian sequential test method[J]. High Power Laser and Particle Beams, 2013, 25: 411-414. doi: 10.3788/HPLPB20132502.0411

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Li Zhiyong, Tan Rongqing, Xu Cheng, et al. Theoretical study on feedback characteristics of double volume Bragg gratings[J]. High Power Laser and Particle Beams, 2013, 25: 1643-1647. doi: 10.3788/HPLPB20132507.1643

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Theoretical study on feedback characteristics of double volume Bragg gratings

doi: 10.3788/HPLPB20132507.1643

Li Zhiyong^1,2,
Tan Rongqing^{1
,
,},
Xu Cheng^1,2,
Li Lin^1,2

1.
Department of High Power Gas Laser,Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China;
2.
University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2012-10-22
Rev Recd Date: 2013-01-22
Publish Date: 2013-05-02

Abstract

Abstract

Assuming the incident light was a plane wave, the feedback characteristics of double volume Bragg gratings (VBGs) were studied based on Kogelniks theory. According to the analysis, with the structure of the double VBGs, the bandwidth could be broadened and the diffraction efficiency could be improved through choosing the wavelength differences between the two VBGs. For a system consisting of two VBGs whose bandwidth and diffraction efficiency were 100 pm and 20% respectively, the diffraction efficiency was 33.3% when their central wavelengths had the same value, and the bandwidth could be tuned to 1.8 times (180 pm) of a single VBGs bandwidth. Since there was a thermal shift in VBGs central wavelength, changes in diffraction efficiency and bandwidth could be realized by adjusting the VBGs temperature. External cavities with double VBGs offers an efficient method for optimizing pumping source.
- diode laser,
- narrow linewidth,
- linewidth-tunable,
- volume Bragg grating,
- double gratings

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