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Stable pulse-compressed acousto-optic Q-switched fiber laser
Hongming Zhao1, Qihong Lou, Jun Zhou
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
Optics Letters
|October 3, 2007
Summary
A new fiber laser design enables stable, short optical pulses using an acousto-optic switch. This laser-diode pumped system achieves high pulse energy and narrow pulse widths for various applications.
Area of Science:
- Fiber Laser Technology
- Acousto-Optics
- Pulsed Laser Systems
Background:
- Fiber lasers offer advantages in beam quality and robustness.
- Acousto-optic (AO) switching is crucial for pulsed laser operation.
- Developing efficient and stable AO switches is an ongoing challenge.
Purpose of the Study:
- To demonstrate a novel acousto-optic switch operation.
- To characterize the performance of a laser-diode pumped, Q-switched fiber laser.
- To provide an explanation for the observed Q-switched operation.
Main Methods:
- Utilizing a ytterbium-doped, double-clad fiber laser.
- Implementing an acousto-optic Q-switching mechanism.
- Employing a simple laser-diode pump source.
Main Results:
- Achieved stable, compressed Q-switched pulses with durations under 40 nanoseconds.
- Obtained a beam quality factor (M(2)=2).
- Generated pulses with ~20 microJ energy and 35 ns width at 50 kHz repetition rate.
Conclusions:
- The novel acousto-optic switch operation is feasible and effective.
- The developed fiber laser system provides high-quality, energetic pulses.
- The findings contribute to advancements in pulsed fiber laser technology.
