Gain-Switched Ho:YAP Laser with a 6.7 ns Pulse Duration at 2117 nm

Area of Science:

• Laser physics and optical engineering.
• Development of novel laser sources for remote sensing.
• Infrared spectroscopy and atmospheric science.

Background:

• Accurate distance measurement and remote sensing are crucial for environmental monitoring and defense.
• Existing laser systems may lack the required performance for specific atmospheric conditions.
• The short-wavelength infrared (SWIR) spectrum offers unique advantages for atmospheric transmission.

Purpose of the Study:

• To demonstrate a novel gain-switched Ho:YAP laser for laser distance measurement and remote sensing.
• To evaluate the laser's performance at 2117 nm within the SWIR atmospheric transmission window.
• To develop a compact and energy-efficient laser system for precise sensing applications.

Main Methods:

• Design and fabrication of a gain-switched Ho:YAP laser.
• Utilizing a passively Q-switched Tm:YLF laser as the pump source.
• Characterization of laser output parameters including wavelength, pulse duration, and pulse energy.

Main Results:

• The Ho:YAP laser operates at 2117 nm, within the 2.1–2.5 µm SWIR atmospheric transmission window.
• Achieved short pulse durations of 6.7 ns and pulse energies of 0.645 mJ.
• Demonstrated a compact and energy-efficient laser system.

Conclusions:

• The developed gain-switched Ho:YAP laser is suitable for enhanced range and resolution in distance measurement.
• The laser's performance makes it a promising candidate for environmental gas detection and remote sensing.
• This innovative laser source opens new possibilities for SWIR-based sensing applications.