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High-efficiency diode-pumped Tm:GdLiF4 laser at 1.9 microm
Nicola Coluccelli1, Gianluca Galzerano, Francesco Cornacchia
1Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale della Recherche, and Dipartimento di Fisica del Politecnico di Milano, 20133 Milano, Italy. nicola.coluccelli@polimi.it
Optics Letters
|November 21, 2009
Summary
Continuous-wave laser action was achieved in thulium-doped Gadolinium Lithium Fluoride (Tm-doped GLF) crystals at room temperature. The 8% doped crystal demonstrated superior performance, yielding 1.47 W output power and broad wavelength tunability.
Area of Science:
- Materials Science
- Laser Physics
- Solid-State Lasers
Background:
- Thulium-doped Gadolinium Lithium Fluoride (Tm-doped GLF) crystals are promising materials for mid-infrared laser applications.
- Optimizing doping concentration is crucial for enhancing laser performance.
Purpose of the Study:
- To investigate continuous-wave laser action in Tm-doped GLF crystals.
- To compare the laser performance of GLF crystals with different Tm(3+) doping concentrations (8 at. % and 12 at. %).
- To determine the optimal doping level for efficient laser operation.
Main Methods:
- Fabrication and characterization of Tm-doped GLF crystals with 8 at. % and 12 at. % Tm(3+).
- Diode laser pumping of the crystals in a continuous-wave (CW) regime at room temperature.
- Measurement of output power, slope efficiency, and wavelength tunability.
Main Results:
- Continuous-wave laser operation was successfully achieved for both doping concentrations.
- The Tm-doped GLF crystal with 8 at. % Tm(3+) exhibited superior performance.
- A maximum output power of 1.47 W and a slope efficiency of 57% were obtained for the 8% doped crystal.
- A wide tunability range from 1826 nm to 2054 nm was achieved.
Conclusions:
- The 8 at. % Tm-doped GLF crystal is optimal for efficient diode-pumped CW laser operation.
- Tm-doped GLF crystals are suitable for generating tunable mid-infrared laser light.
- Further research can explore higher doping concentrations or different crystal hosts for improved performance.
