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Research Progress of Wide Tunable Bragg Grating External Cavity Semiconductor Lasers
Xuan Li1, Junce Shi1, Long Wei1
1Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Academician Team Innovation Center of Hainan Province, College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China.
Materials (Basel, Switzerland)
|November 26, 2022
Summary
This review explores wide tunable Bragg grating external cavity semiconductor lasers (BG-ECSLs) for multicomponent detection. Waveguide Bragg grating (WBG) structures show promise for integrated, compact lasers with stable, high-performance output.
Area of Science:
- Optoelectronics
- Laser Physics
- Materials Science
Background:
- Bragg grating external cavity semiconductor lasers (BG-ECSLs) are crucial for applications like wavelength-division multiplexing (WDM) and gas detection.
- Key performance metrics include wide tunability, narrow linewidth, and high side-mode suppression ratio.
Purpose of the Study:
- To review and compare the progress of BG-ECSLs, focusing on their wide tunable range for multicomponent detection.
- To analyze different structures for achieving desired laser characteristics.
Main Methods:
- Review of three main BG-ECSL structures: Volume Bragg Grating (VBG), Fiber Bragg Grating (FBG), and Waveguide Bragg Grating (WBG).
- Comparative analysis of the advantages and disadvantages of each structure.
Main Results:
- Waveguide Bragg Grating (WBG) structures demonstrate potential for integrated, compact BG-ECSLs.
- WBG-based BG-ECSLs offer wide tuning range, stable spectral output, and high side-mode suppression ratio.
Conclusions:
- WBG structures are identified as the mainstream direction for future BG-ECSL development.
- BG-ECSLs, particularly WBG-based ones, provide advanced options for multicomponent detection and multi-atom cooling.
