TY - JOUR
T1 - Frequency-doubled Nd
T2 - YAG MOPA laser system with programmable rectangular pulses up to 200 microseconds
AU - BEYER, M.
AU - ROTH, J.C.
AU - EDWARDS, E.
AU - DEMILLE, D.
PY - 2021/6/21
Y1 - 2021/6/21
N2 - © 2021 Optical Society of America.A compact frequency-doubled diode-pumped Nd:YAG master-oscillator poweramplifier laser system with programmable microsecond pulse length has been developed. Analog pulse shaping of the output from a single-frequency continuous-wave Nd:YAG oscillator, and subsequent amplification, allowed the generation of rectangular pulses with pulse lengths on the order of the Nd:YAG fluorescence lifetime. Temporally flat-top pulses of 1064 nm light with 520 mJ pulse energy, 2.6 kW peak power, and 200 μs duration, with linewidth below 10 kHz, were obtained at a repetition rate of 2 Hz. Second harmonic generation in a LBO crystal yielded pulses of 262 mJ and 1.3 kW peak power at 532 nm. The peak power can be maintained within 2.9% over the duration of the laser pulse, and long-term intensity stability of 1.1% was observed. The spatially flat-top beam at 1064 nm used in the amplifier is converted to a Gaussian beam at 532 nm with beam quality factor M2 = 1.41(14) during the second harmonic generation. This system has potential as a pump source for Ti:sapphire, dye, or optical parametric amplifiers to generate tunable high-power single-frequency radiation for applications in precision measurements and laser slowing.
AB - © 2021 Optical Society of America.A compact frequency-doubled diode-pumped Nd:YAG master-oscillator poweramplifier laser system with programmable microsecond pulse length has been developed. Analog pulse shaping of the output from a single-frequency continuous-wave Nd:YAG oscillator, and subsequent amplification, allowed the generation of rectangular pulses with pulse lengths on the order of the Nd:YAG fluorescence lifetime. Temporally flat-top pulses of 1064 nm light with 520 mJ pulse energy, 2.6 kW peak power, and 200 μs duration, with linewidth below 10 kHz, were obtained at a repetition rate of 2 Hz. Second harmonic generation in a LBO crystal yielded pulses of 262 mJ and 1.3 kW peak power at 532 nm. The peak power can be maintained within 2.9% over the duration of the laser pulse, and long-term intensity stability of 1.1% was observed. The spatially flat-top beam at 1064 nm used in the amplifier is converted to a Gaussian beam at 532 nm with beam quality factor M2 = 1.41(14) during the second harmonic generation. This system has potential as a pump source for Ti:sapphire, dye, or optical parametric amplifiers to generate tunable high-power single-frequency radiation for applications in precision measurements and laser slowing.
UR - https://www.scopus.com/pages/publications/85108177441
UR - https://www.scopus.com/inward/citedby.url?scp=85108177441&partnerID=8YFLogxK
U2 - 10.1364/OE.427832
DO - 10.1364/OE.427832
M3 - Article
SN - 1094-4087
VL - 29
SP - 20370
EP - 20378
JO - Optics Express
JF - Optics Express
IS - 13
ER -
