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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
157 W all-fiber high-power picosecond laser
Rui Song1, Jing Hou, Shengping Chen
1College of Optoelectronic Science and Engineering, National University of Defense Technology, Chang Sha, China.
Applied Optics
|May 23, 2012
Summary
This study presents a high-power picosecond fiber laser system. The novel design achieves 157 W output power, overcoming stimulated Raman scattering (SRS) by increasing the repetition rate.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- High-power fiber lasers are crucial for various scientific and industrial applications.
- Achieving high output power while suppressing nonlinear effects like stimulated Raman scattering (SRS) remains a challenge.
Purpose of the Study:
- To construct and characterize an all-fiber high-power picosecond laser system.
- To investigate methods for suppressing nonlinear effects, specifically SRS, in high-power fiber lasers.
Main Methods:
- A master oscillator power amplifier (MOPA) configuration was employed.
- Passive mode-locking was achieved using a semiconductor saturable absorber mirror (SESAM).
- A novel all-fiber repetition rate increasing system was developed and integrated.
Main Results:
- An average output power of 157 W was achieved at a 60 MHz repetition rate.
- Stimulated Raman scattering (SRS) was observed due to high peak power.
- By increasing the repetition rate to 480 MHz using the novel system, SRS was suppressed, yielding 156.6 W output power with a 0.6 nm line width.
Conclusions:
- The developed all-fiber MOPA system effectively delivers high-power picosecond pulses.
- Increasing the repetition rate is a viable strategy to mitigate nonlinear effects like SRS in high-power fiber lasers.
