Abstract

We report attaining a ratio of output to injected power as high as 10⁸ in a KrF system, the limit being reached when injected power equals the noise per mode in the resonator. We find that, because of coherence effects, adjustment of the cavity length for correct value of the equivalent Fresnel number can change the threshold power for frequency locking by at least 2 orders of magnitude. The laser’s locked bandwidth is <0.1 Å, and the line can be tuned over a range exceeding 10 Å. The beam divergence is near (i.e., 1.5×) the diffraction limit.

© 1981 Optical Society of America

Injection-locking optimization in unstable resonators

J. Kedmi and D. Treves
Appl. Opt. 20(12) 2108-2112 (1981)

Injection-locked, narrow-band KrF discharge laser using an unstable resonator cavity

J. Goldhar and J. R. Murray
Opt. Lett. 1(6) 199-201 (1977)

Unstable–stable resonators with toroidal mirrors

A. Borghese, R. Canevari, V. Donati, and L. Garifo
Appl. Opt. 20(20) 3547-3552 (1981)

Ray-optical calculation of eigenmode behavior of unstable laser resonators with rounded edges

C. Santana
Appl. Opt. 20(16) 2852-2855 (1981)

20W of continuous-wave sodium D₂ resonance radiation from sum-frequency generation with injection-locked lasers

Joshua C. Bienfang, Craig A. Denman, Brent W. Grime, Paul D. Hillman, Gerald T. Moore, and John M. Telle
Opt. Lett. 28(22) 2219-2221 (2003)