Enhanced beam amplification in a photorefractive Bi{sub 12}TiO{sub 20} crystal by internal reflections

Journal Article · Sat Jun 01 00:00:00 EDT 1996 · Optics Letters

DOI:https://doi.org/10.1364/OL.21.000776· OSTI ID:434658

Khomenko, A V; Garcia-Weidner, A; Tentori, D ^[1]

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1. Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, Carretera Tijuana-Ensenada km. 107, Apartado Postal 2732, Ensenada, B.C. (Mexico)

We demonstrate experimentally that internal reflections of a signal and (or) a pump beam allow one to increase beam amplification by two-beam coupling in a long Bi{sub 12}TiO{sub 20} crystal. When fanning is negligible, we achieve an enhancement of the amplification by adjustment of the spatial period of the transformation of the beam{close_quote}s polarization states with periodic reflections of the beams on the crystal boundaries. For the case of strong fanning the fanned beam is redirected by the reflections on the crystal surface, which allows one to use it as a pump beam, thus increasing net amplification gain. {copyright} {ital 1996 Optical Society of America.}

• Sponsoring Organization: USDOE
• OSTI ID: 434658
• Journal Information: Optics Letters, Vol. 21, Issue 11; Other Information: PBD: Jun 1996
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
LASER RADIATION
AMPLIFICATION
TITANATES
BISMUTH COMPOUNDS
FREQUENCY MIXING
GAIN
OPTICAL REFLECTION