论文信息 - Very-high-gain two-beam coupling in Rh-doped BaTiO3 using a special pumping arrangement

Very-high-gain two-beam coupling in Rh-doped BaTiO3 using a special pumping arrangement

We propose a method to perform two-beam coupling, in which the pump beam was incident upon the +c face and formed a curved light path toward the a face. With this special pump arrangement a part of the fanning beam could also play an important role of pumping of the signal beam and the influence of the fanning effect could be minimized. Thus a high two-beam coupling gain as high as 3.27 by 105 has been obtained at the steady state and a several times higher has been observed at the beginning.

Yong Zhu | Hong Gao | Jiasen Zhang | Peixian Ye

[1] W S Rabinovich,et al. Suppression of photorefractive beam fanning using achromatic gratings. , 1991, Optics letters.

[2] P. Yeh,et al. Fanning noise reduction in photorefractive amplifiers using incoherent erasures. , 1994, Applied optics.

[3] S. Breugnot,et al. Enhancement of the signal-to-background ratio in photorefractive two-wave mixing by mutually incoherent two-beam coupling. , 1994, Optics letters.

[4] Ratnakar R. Neurgaonkar,et al. Photorefractive properties of SBN:60 systematically doped with rhodium , 1992 .

[5] C Warde,et al. High photorefractive sensitivity in an n-type 45 degrees-cut BaTiO(3) crystal. , 1992, Optics letters.

[6] A Yariv,et al. Temporal evolution of fanning in photorefractive materials. , 1993, Optics letters.

[7] S. Breugnot,et al. Very high-gain two-wave mixing in BaTiO3 with a self-bent pump beam. , 1995, Optics letters.