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Updated: Jun 7, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Diode-pumped, room-temperature Tm:LuAG laser.

N P Barnes, M G Jani, R L Hutcheson

    Applied Optics
    |November 6, 2010
    PubMed
    Summary
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    See all related articles

    A novel diode-pumped Thulium-doped Yttrium Aluminum Garnet (Tm:LuAG) laser achieved high efficiency at room temperature. Optimal performance was observed with a 0.04 Tm concentration, emitting at 2.0238 µm.

    Area of Science:

    • Laser physics
    • Materials science
    • Solid-state lasers

    Background:

    • Thulium-doped lasers are crucial for various applications, including medical and industrial uses.
    • Investigating new host materials like Lutetium Aluminum Garnet (LuAG) can enhance laser performance.
    • Room-temperature operation is desirable for practical laser systems.

    Purpose of the Study:

    • To characterize the laser performance of a diode-pumped Tm:LuAG laser at room temperature.
    • To investigate the influence of Thulium (Tm) concentration on laser efficiency and output wavelength.
    • To determine the optimal Tm concentration for maximizing laser output energy.

    Main Methods:

    • A Tm:LuAG crystal was utilized as the gain medium.
    • The laser was pumped using a diode laser source.

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  • Laser output power, efficiency, and operating wavelength were measured.
  • Experiments were conducted at room temperature.
  • Tm concentration was varied to study its effect on performance.

    • Main Results:

    • The Tm:LuAG laser demonstrated a total optical-to-optical efficiency of 0.073.
    • An optical-to-optical differential efficiency as high as 0.236 was achieved.
    • The highest laser output energy was obtained at a Tm concentration of 0.04.
    • The optimal operating wavelength was found to be 2.0238 µm.

    Conclusions:

    • Diode-pumped Tm:LuAG lasers are capable of efficient room-temperature operation.
    • Tm concentration significantly impacts laser performance, with 0.04 being optimal for output energy.
    • The Tm:LuAG laser system shows promise for applications requiring efficient 2-µm wavelength emission.