title: Gain Characteristics of Polymer Waveguide Amplifiers Based on NaYF4:Ybl+, Er3+ Nanocrystals at 0.54 µm Wavelength.
abstract: Gain characteristics of polymer waveguide amplifiers based on NaYF4:Yb3+, Er3+ nanocrystals (NCs) at 0.54 µm wavelength were investigated through numerical simulations. NaYF4:18%Yb3+, 1 0%Er3+ NCs were doped into SU-8 2005 polymer matrix as the core of a polymer waveguide. The absorption spectrum and photoluminescence spectrum of the NCs were recorded and analyzed. The Judd-Ofelt parameters were achieved by means of Judd-Ofelt theory: Ω2 = 6.302 x 10(-20) cm2, Ω4 = 0.69 x 10(-20) cm2, Ω6 =7.572 x 10(-20) cm2. We simulated the gain characteristics of the waveguide amplifier at 0.54 µm wavelength by combining the atomic rate equations with power propaga- tion equations. The gain curves had the saturation effects. A maximum gain -4.3 dB for the 5 cm waveguide with the Er3+ concentration of ~7.5 x 1025 m-3 was obtained.
authors.forename: Meiling
authors.initials: M
authors.lastname: Zhang
authors.forename: Jiao
authors.initials: J
authors.lastname: Yin
authors.forename: Zhixu
authors.initials: Z
authors.lastname: Jia
authors.forename: Weiye
authors.initials: W
authors.lastname: Song
authors.forename: Xibin
authors.initials: X
authors.lastname: Wang
authors.forename: Guanshi
authors.initials: G
authors.lastname: Qin
authors.forename: Dan
authors.initials: D
authors.lastname: Zhao
authors.forename: Weiping
authors.initials: W
authors.lastname: Qin
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.forename: Daming
authors.initials: D
authors.lastname: Zhang