Abstract

Beam couplings between two coherent beams in self-pumping BaTiO₃ have been discussed earlier.^1–3 This paper deals with beams couplings In reflection and transmission in the self-pumping electrically poled BaTi03 crystal (8×8×6mm³) using a He-Ne laser (6328 Ǻ) along with an isolator. Two coherent beams A₁ (3.25 mW) and A₂ (3.0 mW) meet in the crystal with horizontal polarization. The crossing angle is 5° with A₁ making 78° with the C axis horizontal [Fig. 1(a)]. The point of entry is 2 mm from the edge nearest A₂. Under individual pumping by A₁ and A₂ one sees at the detectors D₁ and D₂ the self-pumped beams A₁(t) or A₂(t). Also seen are transmitted beams (A₁T₁,A₁T_2,A₁T₃) or (A₂T₁, A₂T₂, and A₂T₂). Reflected beams (A₁R₁,A₁R2,A₁R₃) or (A₂R₁ A₂R₂, and A₂R₃) are seen even when self-pumping is not developed while the transmitted beams appear only when self-pumping is present.

© 1989 Optical Society of America