Miniature eye-safe laser system for high-resolution three-dimensional lidar.

Area of Science:

• Optics and Photonics
• Laser Technology
• Nonlinear Optics

Background:

• Optical parametric amplifiers (OPAs) are crucial for generating tunable laser light.
• Miniaturization and portability of laser systems are key challenges in advanced applications.
• High-energy, short-pulse laser sources are in demand for various scientific and industrial fields.

Purpose of the Study:

• To develop a compact and flight-ready microchip-laser-pumped optical parametric amplifier.
• To achieve high pulse energy and specific wavelength output from a miniaturized laser system.
• To demonstrate a portable laser source suitable for field deployment.

Main Methods:

• Utilized a microchip laser as the pump source for an optical parametric amplifier.
• Employed fiber-coupled laser-diode arrays for pumping the laser head (20 W optical power).
• Characterized the output pulse energy, duration, beam quality, and spectral properties.

Main Results:

• Produced 35-microJ pulses at 1.537-microm wavelength with 190-ps duration at 8 kHz repetition rate.
• Achieved a near-diffraction-limited output beam.
• Obtained a Fourier-transform-limited spectrum.
• The flight-ready laser head has a volume of 0.14 liters and a mass of 0.34 kg.

Conclusions:

• Successfully demonstrated a highly compact and efficient microchip-laser-pumped optical parametric amplifier.
• The developed laser system meets requirements for portability and high performance.
• This technology enables advanced laser applications requiring robust and lightweight sources.