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23 March 2005 Quasi-group-velocity matching for optical frequency mixers
Jie Huang, J. R. Kurz, Martin M. Fejer
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Proceedings Volume 5710, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IV; (2005) https://doi.org/10.1117/12.591889
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States
Abstract
We propose a method to compensate for group-velocity mismatch (GVM) effects that limit the efficiency-bandwidth product in optical frequency (OF) mixers. Integrated wavelength-dependent delay lines are introduced in a waveguide containing a series of QPM gratings. Appropriate choice of the time delays can compensate for GVM. We have demonstrated a two-stage quasi-group-velocity matching (QGVM) device in a periodically-poled lithium niobate waveguide. Two approximately 150-fs-long pulses generated 6 ps apart by SHG in two QPM gratings were re-synchronized by the fixed delay line, and their relative phase fine controlled by temperature tuning. The technique, which can be iterated to more than two segments, enables OF mixers of higher efficiency-bandwidth product than would be possible in a single grating short enough to evade GVM effects.
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Jie Huang, Jie Huang, J. R. Kurz, J. R. Kurz, Martin M. Fejer, Martin M. Fejer, "Quasi-group-velocity matching for optical frequency mixers", Proc. SPIE 5710, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IV, (23 March 2005); doi: 10.1117/12.591889; https://doi.org/10.1117/12.591889
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