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The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
Published on: December 5, 2025
Room temperature single-frequency output from a diode-pumped Tm,Ho:YAP laser
1National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China. Yaobq08@hit.edu.cn
Optics Letters
|May 5, 2011
Summary
This study demonstrates a room temperature single-frequency thulium, holmium-doped YAlO3 (Tm,Ho:YAP) laser, achieving up to 72.6 mW output power. This novel laser is suitable for advanced applications like coherent wind measurements.
Area of Science:
- Laser Physics
- Solid-State Lasers
- Spectroscopy
Background:
- Thulium and holmium co-doped lasers (Tm,Ho) are crucial for generating mid-infrared radiation.
- Yttrium aluminum perovskite (YAP) is a promising host material for laser applications.
- Achieving single-frequency operation is essential for high-resolution spectroscopic measurements and coherent sensing.
Purpose of the Study:
- To demonstrate room-temperature single-frequency operation of a Tm,Ho:YAP laser.
- To investigate the laser performance at specific wavelengths (around 2.1 µm).
- To explore the potential of this laser as a seed source for advanced optical systems.
Main Methods:
- Utilized a Tm,Ho:YAP crystal as the gain medium.
- Employed Fabry-Perot etalons to achieve single-frequency oscillation.
- Operated the laser at room temperature.
- Investigated laser output power at different wavelengths by adjusting etalon angles.
Main Results:
- Achieved single-frequency operation in the 2102.45–2102.54 nm and 2130.72–2130.82 nm ranges.
- Obtained a maximum output power of 72.6 mW at 2102.5 nm.
- Attained 42.0 mW output power at 2130.8 nm by regulating etalon angles.
- This represents the first reported room-temperature single-frequency Tm,Ho:YAP laser with significant output power.
Conclusions:
- The developed Tm,Ho:YAP laser provides a stable, room-temperature single-frequency source.
- The laser's performance makes it a viable candidate for seed lasers in coherent wind measurement systems.
- Potential applications include differential absorption lidar (DIAL) systems requiring narrow linewidth sources.
