Journal
IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume 46, Issue 8, Pages 1206-1213Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2010.2045475
Keywords
Nonlinear optics; optical frequency conversion; ridge waveguide; parametric amplification; dry etching
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We fabricated a periodically poled and ZnO-doped LiNbO(3) ridge waveguide by employing direct bonding and dry etching techniques. We obtained a second-harmonic generation (SHG) conversion efficiency of 2400%/W, and converted 92% of the pump light into SH light at a pump power of 160 mW. We developed a fiber-coupled module using the fabricated ridge waveguide. The high conversion efficiency and high damage resistance of the ridge waveguide result in the parametric amplification of the signal and converted signal lights. The low insertion loss of the module (4 dB) and sufficient parametric conversion gain (8 dB) enable us to achieve a wavelength converter with 4 dB fiber-to-fiber gain, which means the wavelength converter operates without loss.
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