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High-efficiency 50 W burst-mode hundred picosecond green laser
- Source :
- High Power Laser Science and Engineering. 8
- Publication Year :
- 2020
- Publisher :
- Cambridge University Press (CUP), 2020.
-
Abstract
- We report high-energy, high-efficiency second harmonic generation in a near-infrared all-solid-state burst-mode picosecond laser at a repetition rate of 1 kHz with four pulses per burst using a type-I noncritical phase-matching lithium triborate crystal. The pulses in each burst have the same time delay ( ${\sim}1~\text{ns}$ ), the same pulse duration ( ${\sim}100~\text{ps}$ ) and different relative amplitudes that can be adjusted separately. A mode-locked beam from a semiconductor saturable absorber mirror is pulse-stretched, split into seed pulses and injected into a Nd:YAG regenerative amplifier. After the beam is reshaped by aspheric lenses, a two-stage master oscillator power amplifier and 4f imaging systems are applied to obtain a high power of ${\sim}100~\text{W}$ . The 532 nm green laser has a maximum conversion efficiency of 68%, an average power of up to 50 W and a beam quality factor $M^{2}$ of 3.5.
- Subjects :
- Nuclear and High Energy Physics
Materials science
Picosecond laser
business.industry
Green laser
Second-harmonic generation
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
010309 optics
chemistry.chemical_compound
Optics
Nuclear Energy and Engineering
chemistry
Picosecond
0103 physical sciences
Lithium triborate
0210 nano-technology
business
Burst mode (computing)
Subjects
Details
- ISSN :
- 20523289 and 20954719
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- High Power Laser Science and Engineering
- Accession number :
- edsair.doi...........c2e5eb1cbfdf533f744d4f68dd73c2ae