Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 51, Issue 1, Pages -Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.51.012203
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A loss-less wavelength converter based on a periodically poled MgO-doped congruent LiNbO3 (PPMgCLN) waveguide was demonstrated. The waveguide was simply fabricated by applying annealed proton exchange (APE) to a ridge structure. To optimize the APE condition, the proton concentration profiles and the diffusion coefficients were evaluated by secondary ion mass spectroscopy. We also optimized the mode field profiles within the ridge waveguide to improve the overlapping among different wavelengths. The parametric gain of the cascaded difference frequency generation was 2.5 dB. Since the insertion loss of the wavelength conversion module was 2.2 dB, a loss-less PPMgCLN wavelength converter was successfully demonstrated. (C) 2012 The Japan Society of Applied Physics
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