A high pulse energy single-pass picosecond master oscillator power amplifier system with output power 35.7 W

Liu, Xuesheng; Jia, Wenzeng; Yang, Song; He, Hongbo; Liu, Youqiang; Yan, Anru; Wang, Zhiyong

doi:10.1016/j.optlastec.2019.105782

Cited by 6 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high-energy picosecond laser pulses are usually obtained by a master oscillator power amplifier structure with high gain medium [10][11][12][13]. In general, this structure is based on a fiber or solid-state mode-locked laser oscillator as the front-end seed source, followed by further energy enhancement through regenerative amplification or multi-pass amplification technology.…”

Section: Introductionmentioning

confidence: 99%

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

Wang

Zhao

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

We report on a millijoule-level fiber–solid hybrid hundred-picosecond laser system with a stable performance and compact structure. The laser system is based on a master oscillator power amplifier structure containing an all-fiber master oscillator, a quasi-continuous-wave side-pumped Nd:YAG regenerative amplifier, and a double-pass amplifier. By using the filtering effect of fiber Bragg grating and the dispersion characteristics of single-mode fiber stretcher, the spectrum broadening caused by self-phase modulation effect is effectively suppressed. Thus, the gain linewidth of the Yb-doped fiber seed source and Nd:YAG laser amplifiers is accurately matched. The reason for thermally induced depolarization in the solid-state laser amplifier is theoretically analyzed, and a more flexible depolarization compensation structure is adopted in amplifier experiment. Furthermore, the pulse energy of 14.58 mJ and pulse width of 228 ps is achieved at 500 Hz repetition rate. The central wavelength is 1064.1 nm with a 3 dB bandwidth of 0.47 nm. The beam quality factors in the horizontal and vertical directions are 1.49 and 1.51, respectively. This laser system has a simple and compact structure and has a power stability of 1.9%. The high pulse energy and beam quality of this hundred-picosecond laser are confirmed by latter theoretical simulation of copper laser ablation. It is a very practical laser system for material processing and laser-induced damage.

show abstract

Section: Introductionmentioning

confidence: 99%

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

Wang

Zhao

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

show abstract

High pulse energy, narrow-linewidth all-fiber 1064 nm picosecond master oscillator power amplifier system

Zhang

Yang

et al. 2022

Optics & Laser Technology

View full text Add to dashboard Cite

Research on fiber coupling efficiency of 178mJ nanosecond pulsed lasers

Dong,

Zhang,

et al. 2024

Nineteenth National Conference on Laser Technology and Optoelectronics

View full text Add to dashboard Cite

Nanosecond pulsed lasers with high single-pulse energy show significant advantages in industrial fields such as material processing and laser cleaning. However, the traditional free-space or waveguide transmission methods are often limited by high energy loss, transmission distance, and difficulty in realizing flexible transmission in practical applications. This research is dedicated to exploring the realization of efficient, stable and flexible transmission of nanosecond pulsed lasers with high single-pulse energy. By combining the simulation of the effect of the decenter and tilt of the optical fiber on the coupling efficiency with the ZEMAX software, we have solved the problem of the spot defocusing in the horizontal and vertical directions caused by the thermal effect of the slab laser by precisely adjusting and optimizing the spatial positions of the lenses in the focusing system and the beam shaping system. This reduces the energy loss of the laser during the optical fiber transmission process and improves the transmission efficiency and stability. Finally, a 178 mJ laser is coupled into an optical fiber with a core diameter of 800 μm. The coupling efficiency is as high as 96% with a flexible transmission distance of 15 m. Our research provides strong support for the development and application of laser technology.

show abstract

A high pulse energy single-pass picosecond master oscillator power amplifier system with output power 35.7 W

Cited by 6 publications

References 10 publications

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

High pulse energy, narrow-linewidth all-fiber 1064 nm picosecond master oscillator power amplifier system

Research on fiber coupling efficiency of 178mJ nanosecond pulsed lasers

Contact Info

Product

Resources

About

A high pulse energy single-pass picosecond master oscillator power amplifier system with output power 35.7 W

Cited by 6 publications

References 10 publications

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

Compact 15 mJ Fiber–Solid Hybrid Hundred-Picosecond Laser Source for Laser Ablation on Copper

High pulse energy, narrow-linewidth all-fiber 1064 nm picosecond master oscillator power amplifier system

Research on fiber coupling efficiency of 178mJ nanosecond pulsed lasers

Contact Info

Product

Resources

About

A high pulse energy single-pass picosecond master oscillator power amplifier system with output power 35.7 W