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Diode-pumped single-frequency Tm:LiLuF(4) ring laser.

N Coluccelli1, G Galzerano, D Parisi

  • 1Istituto di Fotonica e Nanotecnologie-CNR and Dipartimento di Fisica del Politecnico di Milano, Milano, Italy.

Optics Letters
|September 2, 2008
PubMed
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We developed a room-temperature single-frequency Thulium-doped Lithium Lutetium Fluoride (Tm:LiLuF4) laser. This laser offers tunable output power and low noise, making it suitable for various spectroscopic applications.

Area of Science:

  • Laser physics
  • Solid-state lasers
  • Spectroscopy

Background:

  • Thulium-doped lasers are crucial for mid-infrared applications.
  • Developing room-temperature, single-frequency lasers is essential for high-resolution spectroscopy.
  • LiLuF4 crystal offers promising thermo-mechanical properties for laser operation.

Purpose of the Study:

  • To demonstrate a room-temperature, single-frequency Tm:LiLuF4 laser.
  • To characterize its output power, tunability, and noise properties.
  • To assess its potential for spectroscopic applications.

Main Methods:

  • Experimental setup for a Tm:LiLuF4 laser operating at room temperature.
  • Characterization of output power, slope efficiency, and wavelength tunability.

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  • Measurement of frequency and relative intensity noise spectra.

    • Main Results:

    • Achieved a maximum output power of 120 mW with a 13% slope efficiency.
    • Demonstrated wavelength tunability from 1875 to 1895 nm.
    • Observed an emission linewidth of ~300 kHz and quantum-noise-limited intensity noise above 5 MHz.

    Conclusions:

    • The Tm:LiLuF4 laser operates efficiently at room temperature in a single-frequency mode.
    • The laser exhibits excellent frequency stability and low intensity noise.
    • This laser is a promising source for high-precision spectroscopic measurements.