Related Experiment Video
Updated: Aug 17, 2025
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
7.6K
A 1-μm-Band Injection-Locked Semiconductor Laser with a High Side-Mode Suppression Ratio and Narrow Linewidth
Jia-Qi Chen1,2, Chao Chen1,2,3, Qi Guo4
1State Key Laboratory of Luminescence and Application, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|December 11, 2022
Summary
We developed a low-cost, integrated semiconductor laser using femtosecond-apodized fiber Bragg gratings for stable single-frequency output. This technology enables efficient seed sources for various applications, achieving high side-mode suppression ratios.
Area of Science:
- Optoelectronics
- Photonics
- Semiconductor Lasers
Background:
- Single-frequency lasers are crucial for applications like spectroscopy and optical communications.
- Achieving narrow linewidth and high side-mode suppression ratio (SMSR) in semiconductor lasers remains a challenge.
- External optical feedback techniques offer a path to enhance laser performance.
Purpose of the Study:
- To demonstrate a novel semiconductor laser design for narrow-linewidth, high SMSR single-frequency output.
- To utilize femtosecond-apodized fiber Bragg gratings (Fs-apodized FBG) for external optical feedback.
- To develop a low-cost, high-integration scheme for single-frequency seed sources in the 1-μm band.
Main Methods:
- Coupling a wide-gain quantum dot (QD) gain chip with a Fs-apodized FBG.
- Implementing external optical feedback injection locking technology.
- Characterizing laser performance, including SMSR, output power, and linewidth (Lorentzian and integral).
Main Results:
- Achieved single-frequency output in the 1-μm band using the integrated QD gain chip and Fs-apodized FBG.
- Maximum SMSR reached 66.3 dB with a maximum output power of 134.6 mW.
- Minimum Lorentzian linewidth measured at 260.5 kHz, with integral linewidth below 180.4 kHz.
Conclusions:
- The developed laser scheme provides a low-cost and highly integrated solution for single-frequency seed sources.
- The Fs-apodized FBG external feedback method effectively enhances laser performance, yielding narrow linewidth and high SMSR.
- This technology is suitable for generating a series of single-frequency seed sources in the 1-μm wavelength range.
