Diode pumped laser with strong thermal lens crystal

Details Diode pumped laser with strong thermal lens crystal Diode pumped laser with strong thermal lens crystal

1994-02-04

1995-04-25

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Mode discrimination

372 69, 372 39, 372 66, 372 41, H01S 3098

Patent

active

054105595

ABSTRACT:
A high power, highly efficient laser that produces a polarized, round diffraction limited gaussian beam is disclosed. A strong thermal lens laser crystal with controlled ellipticity, is mounted in a laserhead and pumped by a fiber-bundle-coupled diode source. The pump beam diameter in the crystal is greater than the crystal's TEMOO mode diameter. The laser operates well over a large range of pump powers. Its slope efficiency in the TEMOO mode is greater than 40%, with an overall efficiency greater than 25%. One of the lasing crystals used is Nd:YVO4. This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q-switched laser, or one that is insensitive to optical feedback.

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Kaneda, Y. et al., "7.6 W of Continuous Wave Radiation in a TEM.sub.00 Mode from a Laser-Diode End-Pumped Nd:YAG Laser", Optics Letters, vol. 17, No. 14, pp. 1003-1005, Jul. 15, 1992.
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