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LED-pumped eye-safe pulse laser with an extracavity optical parametric oscillator
Optics Letters
|August 1, 2023
Summary
This study demonstrates the first LED-pumped, eye-safe laser using a passively Q-switched (PQS) Nd:YAG laser and an optical parametric oscillator (OPO). The system achieves high pulse energy and conversion efficiency for eye-safe laser applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Solid-State Lasers
Background:
- Passively Q-switched (PQS) lasers are crucial for generating high-energy pulses.
- Optical Parametric Oscillators (OPOs) are versatile for wavelength conversion.
- Eye-safe lasers are essential for applications like remote sensing and medical treatments.
Purpose of the Study:
- To demonstrate the first LED-side-pumped, eye-safe laser system.
- To optimize pulse energy and conversion efficiency of an extracavity optical parametric oscillator (EOPO).
- To investigate single-pass and double-pass EOPO configurations.
Main Methods:
- Utilized an LED-side-pumped Nd:YAG/Cr4+:YAG passively Q-switched (PQS) laser.
- Integrated an extracavity optical parametric oscillator (EOPO) for wavelength conversion.
- Optimized the Nd:YAG pump module for enhanced pulse energy.
Main Results:
- Achieved 24 mJ pulse energy from the PQS Nd:YAG laser at 1064 nm.
- Single-pass EOPO yielded 7.44 mJ signal pulse energy at 1573 nm with 31% pump-to-signal efficiency.
- Double-pass EOPO increased efficiency to 45.8% and output energy to 10.98 mJ.
Conclusions:
- The developed LED-pumped eye-safe laser system shows significant potential for various applications.
- Optimized EOPO configurations enhance energy conversion efficiency and output power.
- This work represents a novel approach to eye-safe laser generation using LED pumping.
