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Highly stable sub-nanosecond Nd:YAG pump laser for optically synchronized optical parametric chirped-pulse
Optics Express
|October 7, 2021
Summary
We developed a highly stable, frequency-doubled laser system producing green pulses with sub-nanosecond duration. This advanced laser offers improved pulse stability and duration for various scientific applications.
Area of Science:
- Laser physics
- Nonlinear optics
- Photonics
Background:
- Developing stable, high-energy pulsed lasers is crucial for scientific research.
- Nd:YAG lasers are widely used but achieving high stability and specific pulse durations can be challenging.
Purpose of the Study:
- To develop an optically synchronized, highly stable frequency-doubled Nd:YAG laser.
- To achieve sub-nanosecond pulse durations with high energy and stability.
Main Methods:
- Utilized soliton self-frequency shift in photonic crystal fiber for seed pulse generation.
- Employed polarization control for seed pulse stabilization.
- Amplified seed pulses using diode-pumped amplifiers.
- Frequency doubling using an external Lithium Triborate (LBO) doubler.
- Adjusted Nd:YAG crystal temperature to modify pulse duration.
Main Results:
- Generated 330 ps green pulses at 532 nm with 130 mJ energy and 65% conversion efficiency.
- Achieved high pulse energy stability of <0.2% (rms).
- Extended pulse duration to 490 ps by temperature tuning the Nd:YAG crystal.
Conclusions:
- The developed laser system demonstrates superior pulse duration and stability compared to previous Nd:YAG lasers.
- This optically synchronized, frequency-doubled Nd:YAG laser offers a robust platform for advanced applications requiring stable, high-energy green light.
