Optimum design of Q-switched Nd:YAG lasers with super Gaussian mirrors

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:529718

Haibo, Peng; Shiwen, Zhang ^[1]

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1. North China Research Inst. Electro-Optics, Beijing (China). Laser Technical Dept.

Recently, high beam quality, large energy pulsed lasers with variable frequency mirrors have increasingly been applied in nonlinear optics, scientific research, lidar, industry, and military etc. To obtain high beam quality and efficient extraction simultaneously from an unstable resonator, the super Gaussian mirrors peak reflectivity R{sub 0}, the super Gaussian order n, and the round-trip magnification M are three key parameters which must be carefully selected. In this paper, intensive investigation on beam quality of unstable resonators with VRM affected by R{sub 0}, n, M, R{sub 0}M{sup n} is presented by computer simulation. A optimum design resulting near diffraction limited beam quality, large energy, high repetition is obtained. Various VRM tested in Q-switched Nd:YAG lasers pumped by flashlamp. Less than 2 {times} L.D, 6ns, 40Hz, 350mj/pulse laser beams are obtained in single oscillator, more than 1J/pulse is realized through one amplifier. The experimental results are in good agreement with the optimum design.

• OSTI ID: 529718
• Report Number(s): CONF-9611124--; ISBN 0-8194-2290-8
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ALUMINIUM OXIDES
DESIGN
EXPERIMENTAL DATA
FERRITE GARNETS
LASER CAVITIES
LASER MIRRORS
NEODYMIUM LASERS
OPTICAL PUMPING
Q-SWITCHING
RESONATORS
YTTRIUM COMPOUNDS