Gerald W. Holleman
TRW Inc.
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Publication
Featured researches published by Gerald W. Holleman.
IEEE Journal of Selected Topics in Quantum Electronics | 1997
R.J. St. Pierre; Gerald W. Holleman; Marcy Valley; H. Injeyan; Jacqueline G. Berg; George M. Harpole; Rodger C. Hilyard; Marc Mitchell; Mark Weber; James M. Zamel; Thomas J. Engler; Daniel F. Hall; Robert Tinti; Jason Machan
A high brightness diode-pumped, Nd-YAG solid state laser has been designed, fabricated, and tested. This phase conjugated master oscillator/power amplifier (MOPA) device produces 20-ns Q-switched pulses at 2500 Hz at an average power of 690 W and a beam quality of 1.1/spl times/DL when the pump diodes are operated at 27.5% duty cycle. With an external KTP doubler, this device has produced 175 W of green average power at a beam quality of 1.5 /spl times/ DL and a conversion efficiency of 45% over continuous operating times as long as one hour. This 1.06 /spl mu/m result is believed to be the highest average power brightness achieved, and the 532-nm performance is both the highest average green power and the highest average brightness ever reported.
Advanced Solid State Lasers (1997), paper HP4 | 1997
Randall St. Pierre; Gerald W. Holleman; Marcy Valley; Hagop Injeyan; Jacqueline G. Berg; George M. Harpole; Rodger C. Hilyard; Marc Mitchell; Mark Weber; James M. Zamel; Thomas J. Engler; Daniel F. Hall; Robert Tinti; Jason Machan
A phase conjugated Nd:YAG amplifier has demonstrated 690 W average power and 1.1 ×DL beam quality. The frequency doubled output was 175 W at 1.5 ×DL and 45% conversion efficiency. This is the highest average green power and highest average brightness reported.
Modeling and Simulation of Higher-Power Laser Systems IV | 1997
Gerald W. Holleman; George M. Harpole; Hagop Injeyan; Richard H. Moyer; Marcy Valley; Jason Machan; Randall J. St. Pierre; Jacqueline G. Berg; Leonard J. Marabella
Several kW-class solid-state lasers at TRW are described with an emphasis on the performance modeling used to aid development of high brightness operation. Comparisons of results and analysis are presented for key aspects of high power, diode pumped, Nd:YAG lasers and amplifiers that use zigzag slab configurations to minimize thermal effects. Devices described include multi-kW power oscillators suitable for high power machining, welding, and material processing; and phase conjugated master oscillator/power amplifiers (MOPAs) which provide short pulse, high brightness beams for active tracking, photolithography, or remote sensing. Laboratory measurements are in good agreement with predictions of diode pump profile and absorption efficiency; slab extraction efficiency and thermal load; and slab OPD.
Archive | 1999
Michael G. Wickham; Gerald W. Holleman; Stephen J. Brosnan
Archive | 1999
Donald G. Heflinger; Michael G. Wickham; Gerald W. Holleman
Archive | 1992
Charles W. Clendening; Hagop Injeyan; Jacqueline G. Berg; Gerald W. Holleman
Archive | 1996
Gerald W. Holleman; Hagop Injeyan
Archive | 1996
Leonard J. Marabella; Jacqueline G. Berg; Gerald W. Holleman; Hagop Injeyan; James M. Zamel
Archive | 1997
Leonard J. Marabella; Jacqueline G. Berg; Gerald W. Holleman; Hagop Injeyan; James M. Zamel
Archive | 2000
Donald G. Heflinger; Gerald W. Holleman; Michael G. Wickham