Title :
High-Efficiency 2-mJ 5-kHz Picosecond Green Laser Generation by Nd:YAG Innoslab Amplifier
Author :
Ying Chen ; Fang-Qin Li ; Ke Liu ; Hong-Yan Xu ; Feng Yang ; Nan Zong ; Ya-Ding Guo ; Shen-Jin Zhang ; Jing-Yuan Zhang ; Qin-Jun Peng ; Yong Bo ; Da-Fu Cui ; Zu-Yan Xu
Author_Institution :
Univ. of Chinese Acad. of Sci., Beijing, China
Abstract :
A high-efficiency picosecond (ps) 532-nm green laser with high pulse energy and high peak power at 5-kHz repetition rate was demonstrated by second-harmonic generation (SHG) from a 1064-nm master oscillator power amplifier (MOPA). The MOPA was based on the Innoslab structure under diode directly pumping, producing 4.8-mJ, 25-ps fundamental laser at the repetition rate of 5 kHz after a three-stage Innoslab amplification system. With a pulse energy of 2.93 mJ in the fundamental and using a type I noncritically phase matched lithium triborate crystal, the pulse energy of SHG was up to 1.96 mJ per pulse with a pulse width of 18.9 ps, which corresponds to a peak power of 104 MW in the green and SH conversion efficiency as high as 67%. The SHG green beam quality factor was measured to be M2 = 1.75.
Keywords :
laser beams; lithium compounds; neodymium; optical harmonic generation; optical phase matching; optical pulse generation; solid lasers; yttrium compounds; Innoslab structure; LiB3O5; MOPA; Nd:YAG Innoslab amplifier; SH conversion efficiency; SHG green beam quality factor; energy 1.96 mJ; energy 2 mJ; energy 2.93 mJ; energy 4.8 mJ; fundamental laser; high peak power repetition rate; high pulse energy; high-efficiency picosecond green laser generation; master oscillator power amplifier; power 104 MW; pulse width; second-harmonic generation; three-stage Innoslab amplification system; time 25 ps; type I noncritically phase matched lithium triborate crystal; wavelength 1064 nm; wavelength 532 nm; Crystals; Green products; Laser beams; Laser excitation; Measurement by laser beam; Power lasers; Pump lasers; Innoslab laser amplifiers; SHG; green laser; high efficiency; high peak power; high pulse energy;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2424230
