Coherence and space--time structure of the Stokes radiation of stimulated Raman scattering during superregenerative amplification

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Opt. Spectrosc. (Engl. Transl.); (United States)

OSTI ID:6976902

Bespalov, V G; Krylov, V N; Staselko, D L; Sizov, V N; Parfenov, V A; Yutanova, E Y

The processes of generation of Stokes radiation during superregenerative SRS amplification in compressed hydrogen have been studied experimentally and theoretically. The optimum shifts of Stokes pulses relative to pumping pulses during nonstationary and transient SRS amplification have been determined. The determining role of SRS focusing in the formation of spatial-coherence functions of amplified Stokes radiation has been established. It is shown that Stokes radiation can reproduce the spatial structure of the pumping field during noncollinear propagation in a multimode Raman-active waveguide. Under optimum amplification conditions in a waveguide with a Fresnel number of approx.100, a nearly 50% efficiency of pumping energy conversion to a highly coherent Stokes beam was obtained.

• Research Organization: United Technologies Research Center, MS-92, Silver Lane, East Hartford, Connecticut 06108
• OSTI ID: 6976902
• Journal Information: Opt. Spectrosc. (Engl. Transl.); (United States), Journal Name: Opt. Spectrosc. (Engl. Transl.); (United States) Vol. 63:6; ISSN OPSUA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
COHERENT SCATTERING
COMPRESSED GASES
EFFICIENCY
ELEMENTS
FLUIDS
GAS LASERS
GASES
HYDROGEN
LASERS
NONMETALS
PUMPING
RAMAN EFFECT
SCATTERING