论文信息 - High conversion efficiency single-pass second harmonic generation in a zinc-diffused periodically poled lithium niobate waveguide.

High conversion efficiency single-pass second harmonic generation in a zinc-diffused periodically poled lithium niobate waveguide.

We report a modified technique for the fabrication of zinc-diffused channel waveguides using z-cut electric-field periodically poled LiNbO3. Unlike previous work, the diffusion was carried out using metallic zinc at atmospheric pressure. By optimizing the thermal diffusion parameters, channel waveguides that preserve the existing periodically poled domain structures, support both TE and TM modes, and enhance photorefractive damage resistance were obtained. Nonlinear characterisation of the channel waveguides was investigated via second harmonic generation of a 1552nm laser with a maximum conversion efficiency of 59%W-1cm-2 at 14.6 masculineC. Using a pulsed source a second harmonic conversion efficiency of 81% was achieved.

[1] G. Lifante,et al. LiNbO3 optical waveguides by Zn diffusion from vapor phase , 1995 .

[2] Robert S. Feigelson,et al. Fabrication, characterization and index profile modeling of high-damage resistance Zn-diffused waveguides in congruent and MgO:lithium niobate , 1992 .

[3] M. Fejer,et al. Observation of 99% pump depletion in single-pass second-harmonic generation in a periodically poled lithium niobate waveguide. , 2002, Optics letters.

[4] Francesco Gonella,et al. Reverse proton exchange for buried waveguides , 1998 .

[5] M. L. Bortz,et al. Noncritical quasi-phase-matched second harmonic generation in an annealed proton-exchanged LiNbO/sub 3/ waveguide , 1994 .

[6] Martin M. Fejer,et al. Depth profiling of the d33 nonlinear coefficient in annealed proton exchanged LiNbO3 waveguides , 1993 .

[7] M. Fejer,et al. Quasi‐phase‐matched second‐harmonic generation of blue light in periodically poled LiNbO3 , 1990 .

[8] W. Sohler,et al. Efficient cascaded difference frequency conversion in periodically poled Ti:LiNbO3 waveguides using pulsed and cw pumping , 2001 .

[9] Martin M. Fejer,et al. 1.5-μm-band wavelength conversion based on cascaded second-order nonlinearity in LiNbO 3 waveguides , 1999 .

[10] Way-Seen Wang,et al. Zn indiffusion waveguide polarizer on a Y-cut LiNbO 3 at 1.32-μm wavelength , 2000 .