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Related Experiment Video

Updated: Jun 22, 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

High power single-frequency continuously-tunable compact extended-cavity semiconductor laser.

A Laurain1, M Myara, G Beaudoin

  • 1Institut d'Electronique du Sud, CNRS UMR5214, Université Montpellier 2, France.

Optics Express
|June 10, 2009
PubMed
Summary
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We developed a compact, high-efficiency semiconductor laser with tunable single-frequency output. This laser offers high beam quality and low noise operation without requiring heat management, making it suitable for various applications.

Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers
  • Laser Engineering

Background:

  • Single-frequency semiconductor lasers are crucial for applications requiring precise wavelength control.
  • Extended-cavity diode lasers offer improved spectral properties but often face challenges with size and complexity.
  • Developing compact, high-performance lasers remains an active area of research.

Purpose of the Study:

  • To demonstrate a compact, high-power, and high-efficiency single-frequency semiconductor laser.
  • To achieve continuous tunability and high beam quality in an extended-cavity laser.
  • To investigate the influence of pump properties on laser coherence and cavity design.

Main Methods:

  • Utilized a compact (< 3 mm) plano-plano external cavity design.

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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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

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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  • Employed thermal lens-based stability for cavity design without intracavity filters.
  • Optically pumped the semiconductor laser with a commercial 830 nm multimode diode laser.
  • Characterized laser output including power, efficiency, tunability, beam quality, polarization, and noise.

    • Main Results:

    • Achieved high power (0.3 W) and high efficiency operation.
    • Demonstrated continuous tunability over 0.84 THz.
    • Obtained a low-divergence, circular TEM(00) beam with diffraction-limited quality (M(2) < 1.05).
    • Measured high linear polarization (> 37 dB) and a side mode suppression ratio of 60 dB.
    • Observed low frequency and intensity noise in a relaxation-oscillation-free regime.

    Conclusions:

    • The compact extended-cavity surface-emitting semiconductor laser provides high performance in terms of power, efficiency, tunability, and beam quality.
    • The thermal lens-based stability and short external cavity design enable robust, filter-less operation.
    • Pump properties significantly influence the cavity design and the resulting laser coherence.