Diode-pumped Nd:YAG laser with 38 W average power and user-selectable, flat-in-time subnanosecond pulses

Honig, J.; Halpin, John M.; Browning, D.; Crane, John K.; Hackel, Richard P.; Henesian, Mark A.; Peterson, John; Ravizza, Doug; Wennberg, Tim; Rieger, Harry; Marciante, John R.

doi:10.1364/ao.46.003269

Cited by 7 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, Nd:YAG regenerative amplifiers and Nd:YAG multi-pass amplifiers are promising solutions to further amplify the energy of the seed source for subsequent applications. In 2007, John et al demonstrated a 130 mJ fiber-solid hybrid amplifier with a repetition rate of 300 Hz, and its output pulse width was adjustable from 350 ps to 600 ps [25]. In 2014, Wang et al built a 112 mJ fiber-solid hybrid amplifier, which provided pulse durations from 500 ps to 2 ns at a repetition rate of 100 Hz [26].…”

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

“…A sub-nanosecond single frequency MOPA laser system operating at 500 Hz was reported, which generated pulses with a width of 830 ps, energy of 13 mJ, peak power of 15.7 MW, and M 2 < 1.4 [22]. A Nd:YAG laser system based on the MOPA approach operating at 300 Hz and using selectable 350-600 ps nominally flat temporal pulse shape has been reported, which generate pulses with 127 mJ energy and maximum peak power of 400 MW [23], but beam quality M 2 were not measured. As is already known, beam quality always gets worse due to thermally induced birefringence in Nd:YAG crystal [21,24].…”

Section: Introductionmentioning

confidence: 99%

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

et al. 2019

View full text Add to dashboard Cite

We present a compact sub-nanosecond diode-end-pumped Nd:YVO 4 laser system running at 1 kHz. A maximum output energy of 65.4 mJ without significant stimulated Raman scattering (SRS) process was obtained with a pulse duration of 600 ps, corresponding to a pulse peak power of 109 MW. Laser pulses from this system had good beam quality, where M 2 < 1.6, and the excellent signal to noise ratio was more than 42 dB. By frequency doubling with an LBO crystal, 532 nm green light with an average power of 40.5 W and a power stability of 0.28% was achieved. The diode-end-pumped pump power limitation on a high peak power amplifier caused by the SRS process and thermal fracture in bulk Nd:YVO 4 crystal is also analyzed.

show abstract

“…To further describe the beam profile, a histogram of all of the pixels within the ROI is generated. The 10% energy fraction is defined as the ratio of the number of pixels whose pixel value falls within −5% of the mean pixel value to the number of pixels within the ROI [21] . The 20% energy fraction and the 40% energy fraction are defined in the same way.…”

mentioning

confidence: 99%

VCSEL-pumped Nd:YAG laser with 95 W average power and user-selectable nanosecond pulses

et al. 2016

View full text Add to dashboard Cite

A 95 W Nd:YAG laser system pumped by a vertical cavity surface emitting laser (VCSEL) array is described. The laser contains an all-fiber-based seeder, an Nd:YAG regenerative amplifier, and a four-pass amplifier. The laser operates at 300 Hz with energies up to 317 mJ. The beam has a top-hat intensity distribution. The temporal pulse shape is flat in time, and the pulse width can be adjusted in the range of 2-6 ns.

show abstract

Diode-pumped Nd:YAG laser with 38 W average power and user-selectable, flat-in-time subnanosecond pulses

Cited by 7 publications

References 32 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

A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

VCSEL-pumped Nd:YAG laser with 95 W average power and user-selectable nanosecond pulses

Contact Info

Product

Resources

About