| 摘要 |
A miniaturized face-pumped, face cooled laser device is described wherein wave front distortion is minimized by the passage of a coherent beam of electromagnetic radiation through an elongated, rectangularly cross-sectioned laser body in an off-axial direction to effect multiple total internal reflections of the beam from fluid cooled, parallelly extending faces of the laser body. Because each ray of the coherent beam passes through substantially identical thermal environments during the reflective transmission of the beam through the laser body, the net distortion of the beam wave front is substantially reduced making the laser device particularly suitable for high-repetition rate, Q-switched operation. In a preferred embodiment, the beam is reflectively passed initially through only a portion of the cross-sectional area of the laser body to effect a first order compensation of beam distortion whereupon the beam is folded back one or more times along adjacent untraversed portions of the laser body for a second order compensation of beam distortion by additional averaging of the optical environment observed by the beam.
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