To overcome the shortcomings of intracavity optics to tune lasers, a new technique of injection seeding for tuning and line narrowing of a pulsed alexandrite laser, to be used in DIAL lidar for atmospheric remote sensing, is being developed. In this technique, the alexandrite laser output pulse is seeded by a single-mode low-power (<10 mw) cw AlGaAs diode laser. The alexandrite laser has no other intracavity tuning element, except for a broad band birefringent tuner for coarse tuning and for suppressing the unseeded spectral components over a large bandwidth.

© 1991 Optical Society of America

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