title: Four-wave-mixing in the loss low submicrometer Ta₂O₅ channel waveguide.
abstract: A degenerate four-wave-mixing (FWM) operation in the Ta2O5 submicrometer channel waveguide has been successfully demonstrated. The propagation loss of 1.5  dB/cm and total insertion loss of 5.1 dB are realized in a 12.6 mm long waveguide with inverse taper structure. The wavelength and quadratic pumping power-dependent measurements on optical transmission confirm FWM performance and characterize the nonlinearity of waveguide. The conversion efficiency of -50  dB at coupled pump power of 40 mW is observed, suggesting that the nonlinear refractive index of Ta2O5 waveguide at 1550 nm is estimated to be 1×10(-14)  cm2/W. Our primary results indicate that the Ta2O5 submicrometer channel waveguide has great potential in developing nonlinear waveguide applications.
authors.forename: Chung-Lun
authors.initials: CL
authors.lastname: Wu
authors.forename: Yi-Jen
authors.initials: YJ
authors.lastname: Chiu
authors.forename: Cong-Long
authors.initials: CL
authors.lastname: Chen
authors.forename: Yuan-Yao
authors.initials: YY
authors.lastname: Lin
authors.forename: Ann-Kuo
authors.initials: AK
authors.lastname: Chu
authors.forename: Chao-Kuei
authors.initials: CK
authors.lastname: Lee