Synchronous, mode-locked pumping of gas lasers
The generation of mode-locked far-infrared pulses by synchronous, mode-locked optical pumping by CO/sub 2/ lasers is demonstrated for the first time. The gain bandwidth implied by the observed short pulses (<1 nsec) exceeds the homogeneous linewidth of 40 MHz (T/sub 2/=8 nsec) under the experimental conditions and is attributed to an effective inhomogeneous broadening in molecules with a K-multiplet structure such as /sup 12/CH/sub 3/F and also to the presence of near-resonant stimulated Raman emission from each frequency component of the pump. This implies that the duration of pulses generated in low-pressure gases by this technique is determined by the greater of the pumping-pulse bandwidth or the linewidth of the lasing transition.
- Research Organization:
- Department of Electrical Engineering, Electro-Physics Laboratory, and Department of Physics, University of Illinois, Urbana, Illinois 61801
- OSTI ID:
- 6554340
- Journal Information:
- Opt. Lett.; (United States), Journal Name: Opt. Lett.; (United States) Vol. 4:1; ISSN OPLED
- Country of Publication:
- United States
- Language:
- English
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