| Author: | Dharmsaktu, K S; Joseph, Joby; Kehar Singh |
| Advisor: | Advisor |
| Date: | 2000
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| Publisher: | |
| Citation: | Optics and
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| Series/Report no.: |
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| Item Type: | Article
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| 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. |
