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Related Experiment Video

Updated: Mar 30, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

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Gain-coupled distributed feedback laser based on periodic surface anode canals.

Yongyi Chen, Peng Jia, Jian Zhang

    Applied Optics
    |November 13, 2015
    PubMed
    Summary

    This study demonstrates a novel distributed-feedback laser utilizing periodic surface anode canals (PSACs) for enhanced performance. The PSACs enable high output power and narrow spectral linewidth, crucial for laser applications.

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    Area of Science:

    • Optoelectronics
    • Semiconductor Lasers

    Background:

    • Distributed-feedback (DFB) lasers are essential for various optical applications.
    • Achieving high power and narrow linewidth simultaneously in DFB lasers remains a challenge.

    Purpose of the Study:

    • To demonstrate a novel gain-coupled DFB laser design using periodic surface anode canals (PSACs).
    • To investigate the impact of PSACs on laser performance, including output power, spectral properties, and mode selectivity.

    Main Methods:

    • Fabrication of a broad-stripe, gain-coupled DFB laser incorporating PSACs via i-line lithography.
    • Characterization of laser output power, spectrum linewidth, and side-mode suppression ratio at 968.8 nm.

    Main Results:

    • A single-longitude-mode operation was achieved with PSACs enhancing current density contrast.

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  • Output power reached 144.6 mW at 1.2 A with a spectral linewidth < 0.04 nm.
  • A side-mode suppression ratio greater than 29 dB was obtained, indicating excellent mode selectivity.

    • Conclusions:

    • The PSAC-based DFB laser design offers a promising approach for high-performance laser sources.
    • This technology enables efficient current confinement without compromising optical feedback, leading to improved laser characteristics.