Efficient wavelength conversion with low operation power in a Ta₂O₅-based micro-ring resonator

Abstract

The ${\mathrm{Ta}}_2{\mathrm{O}}_5$-based micro-ring resonator with an unloaded quality factor of 182,000 has been demonstrated to realize efficient nonlinear wavelength generation. The propagation loss of the resonator is $0.5{\mathrm{cm}}^{-1}$, and the buildup factor of the ring resonator is estimated to be $\sim 50$. With a high buildup factor of the ring structure, the four-wave-mixing (FWM) conversion efficiency of $-30\mathrm{dB}$ is achieved in the resonator with a pump power of 6 mW. Based on power-dependent FWM results, the nonlinear refractive index of ${\mathrm{Ta}}_2{\mathrm{O}}_5$ is estimated to be $1.4\times {10}^{-14}{\mathrm{cm}}^2/\mathrm{W}$ at a wavelength of $\sim 1550\mathrm{nm}$. The demonstration of an enhanced FWM process in the ${\mathrm{Ta}}_2{\mathrm{O}}_5$-based micro-ring cavity implies the possibility of realizing FWM-based optical parametric oscillation in a ${\mathrm{Ta}}_2{\mathrm{O}}_5$-based micro-ring resonator.

© 2017 Optical Society of America

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