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One-dimensional laser beam steering using frequency detuning in two - wave mixing with a BaTiO3 crystal

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Author: Dharmsaktu, K S; Joseph, Joby; Kehar Singh

Advisor: Advisor

Date: 2000

Publisher:
Citation: Optics and

Series/Report no.:
Item Type: Article

Keywords: Photorefraction; Two-beam coupling; Beam steering

Abstract: We demonstrate a method of one-dimensional laser beam deflection using frequency detuning in two-wave mixing. Energy exchange between the interfering beams in a photo-refractive BaTiO 3 crystal has been used for deflection of a pump beam into predetermined probe beam directions. A one-dimensional array of several beams is generated from a single probe beam, employing a piezo-mirror and beam splitter combination. Probe beams so produced are detuned by exciting the piezo-mirror with a periodic near-saw-tooth voltage so as to produce running fringes. However, stable holographic gratings are recorded by matching the frequency of the probe beam with that of a pump beam reflected from another vibrating piezo-mirror, thereby controlling the direction of beam deflection.
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Shankar B. Chavan
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Shankar B. Chavan
Computer Applications Division
Central Library, IIT Delhi
shankar.chavan@library.iitd.ac.in
NDLTD
Shodhganga
NDL
ePrints@IISc
etd@IISc
IR@IIT Bombay
NewsClips @IITD
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  • youtube
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