Multimode MOPA with thermal lens compensation

Coherent light generators – Particular resonant cavity – Specified cavity component

Reexamination Certificate

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C372S033000

Reexamination Certificate

active

07620092

ABSTRACT:
A master oscillator power amplifier (MOPA) laser system includes a symmetrical master oscillator and an amplifier each having an optically pumped solid-state gain rod. An optical relay is located between the laser resonator and the amplifier gain rod. When the oscillator and amplifier gain media are equally optically pumped, the magnification and the distances from the optical relay to the resonator and the amplifier gain rod can be selected such that amplifier efficiency is maximized, independent of optical pump power, even if the diameters of the oscillator and amplifier gain rods are different.

REFERENCES:
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patent: 5001718 (1991-03-01), Burrows et al.
S. Fujikawa et al., “1-kW high-quality beam generation from a diode-side-pumped Nd:YAG rod laser,”Paper WE-8, Advanced Solid-State Lasers, 2002, Quebec City, Canada, 3 pages in length.
Text BookLaser Resonators and Beam Propagation, 2nd ed.—2005, chapter 13 “Resonators with Variable Internal Lenses,”(see specifically 13.1 (“General Aspects”) and 13.2 (“Stable Resonators”)), published by Springer 2005, pp. 451-487.
J.T. Hunt et al., “Suppression of self-focusing through low-pass spatial filtering and relay imaging,”Applied Optics, vol. 17, No. 13, Jul. 1, 1978, pp. 2053-2057.
V. Magni, “Resonators for solid-state lasers with large-volume fundamental mode and high alignment stability,”Applied Optics, vol. 25, No. 1, Jan. 1, 1986, pp. 107-117.
D. Metcalf et al., “Laser resonators containing self-focusing elements,”Applied Optics, vol. 26, No. 21, Nov. 1, 1987, pp. 4508-4517.

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