Title :
Multiple quasi-phase-matched device using continuous phase modulation of χ(2) grating and its application to variable wavelength conversion
Author :
Asobe, Masaki ; Tadanaga, Osamu ; Miyazawa, Hiroshi ; Nishida, Yoshiki ; Suzuki, Hiroyuki
Author_Institution :
Nippon Telegraph & Telephone Corp., Kanagawa, Japan
Abstract :
We propose a new multiple quasi-phase-matched wavelength converter based on the continuous phase modulation of a χ(2) grating for use in variable wavelength conversion. A numerical study shows that the proposed device exhibits a high conversion efficiency, flexible design, and robust fabrication tolerance. A waveguide device fabricated by annealed proton exchange agrees well with the numerical design. Fine-tuning the device enabled us to demonstrate variable wavelength conversion between signals on the standard optical frequency grid. Using the device, we also demonstrated fast (<100 ps) wavelength switching of 4-channel 40-Gb/s signals. The obtained results clearly show that the proposed multiple quasi-phase-matched devices will be useful when constructing future flexible photonic networks.
Keywords :
diffraction gratings; ion exchange; nonlinear optical susceptibility; optical communication equipment; optical design techniques; optical fabrication; optical modulation; optical phase matching; optical switches; optical waveguides; optical wavelength conversion; phase modulation; χ(2) grating; 40 Gbit/s; annealed proton exchange; conversion efficiency; phase modulation; quasiphase-matching; variable wavelength conversion; waveguide device; wavelength switching; Annealing; Continuous phase modulation; Frequency conversion; Gratings; Optical device fabrication; Optical devices; Optical waveguides; Optical wavelength conversion; Protons; Robustness; Modulation; nonlinear optics; quasi-phase matching (QPM); wavelength conversion;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2005.857700