A large wavelength tuning range MgO-doped Periodically Poled Lithium Niobate (PPLN) ridge waveguide is fabricated. Using the iterative domino algorithm, an engineered Quasi Phase Matching (QPM) structure has been implemented to the ridge waveguide, which forms seven wavelength conversion peaks. Each designed conversion peak has equally nonlinear strength and 5nm wavelength separation, locates from 1530 nm to 1560 nm at 40 deg. C. Combined with temperature adjustment between 15 to 60 deg. C, which could tune each phase matching peak for more than 5 nm, full C band tuning range is achieved with high conversion efficiency. Under CW 5.5W single frequency C band input, 3.7W is coupled to the waveguide, and 2.5W SHG is generated.
We have developed the MgO: PPLN ridge waveguide modules for efficient second harmonic generation output and optical parametrical amplification at telecom wavelength. High efficient and high damage resistance of developed MgO: PPLN waveguide modules have enabled efficient optical parametric amplification with >16dB intrinsic gain for the input signal.
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