Theoretical investigation into spectral characteristics of a semiconductor laser with dual-FBG external cavity

Huang, Yize; Li, Yi; Zhu, Hancheng; Tong, Guoxiang; Zhang, Hu; Zhang, Wei; Zhou, Sheng; Sun, Ruoxi; Zhang, Yuming; Li, Liu; Shen, Yujian; Zheng, Quan

doi:10.1016/j.optcom.2011.01.063

Cited by 2 publications

(1 citation statement)

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“…There are two types of waveguide structure of NLECSLs, including FBG and siliconbased waveguide. When the fiber grating is used as the feedback element of the external cavity laser, the linewidth performance is excellent and the tuning range is wider, but the volume is larger, the refractive index is smaller, the size is larger, and the absorption loss of material is larger [20]. Using the external low loss waveguide as the optical feedback element can effectively reduce the linewidth of the semiconductor laser and obtain low noise spectral characteristics.…”

Section: Waveguide Structure Of Nlecslsmentioning

confidence: 99%

Research on Narrow Linewidth External Cavity Semiconductor Lasers

Ding

Wei

et al. 2022

Crystals

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Narrow linewidth external cavity semiconductor lasers (NLECSLs) have many important applications, such as spectroscopy, metrology, biomedicine, holography, space laser communication, laser lidar and coherent detection, etc. Due to their high coherence, low phase-frequency noise, high monochromaticity and wide wavelength tuning potential, NLECSLs have attracted much attention for their merits. In this paper, three main device structures for achieving NLECSLs are reviewed and compared in detail, such as free space bulk diffraction grating external cavity structure, waveguide external cavity structure and confocal Fabry–Perot cavity structure of NLECSLs. The Littrow structure and Littman structure of NLECSLs are introduced from the free space bulk diffraction grating external cavity structure of NLECSLs. The fiber Bragg grating external cavity structure and silicon based waveguide external cavity structure of NLECSLs are introduced from the waveguide external cavity structure of NLECSLs. The results show that the confocal Fabry–Perot cavity structure of NLECSLs is a potential way to realize a lower than tens Hz narrow linewidth laser output.

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Section: Waveguide Structure Of Nlecslsmentioning

confidence: 99%