TY - JOUR
T1 - Highly coherent mid-infrared supercontinuum generations in a strip titanium dioxide waveguide with three zero-dispersion wavelengths
AU - Shen, Jinye
AU - Yuan, Jinhui
AU - Cheng, Yujun
AU - Mei, Chao
AU - Lai, Jintao
AU - Zhou, Xian
AU - Wu, Qiang
AU - Yan, Binbin
AU - Wang, Kuiru
AU - Yu, Chongxiu
AU - Sang, Xinzhu
N1 - Funding information: This work was supported by the National Natural Science Foundation of China (Grant No. 61875238).
PY - 2022/11/18
Y1 - 2022/11/18
N2 - A strip titanium dioxide (TiO2) waveguide is designed for highly coherent mid-infrared (MIR) supercontinuum (SC) generation. For the designed TiO2 waveguide, three zero-dispersion wavelengths (ZDWs) are obtained through adjusting the waveguide structure parameters. The three ZDWs are located at 1.53, 3.96, and 5.43 μm, respectively. The nonlinearity coefficient γ is calculated as 1.12 W − 1 m − 1 at wavelength 3.1 μm. By optimizing the pump pulse parameters, the highly coherent MIR SCs are generated when the hyperbolic secant pump pulse with a duration of 80 fs, peak power of 1 kW, and wavelength of 3.1 μm is launched into the TiO2 waveguide and propagated 4.2-mm in length. The obtained SC covers a wavelength range from 1.71 to 9.90 μm (more than 2.5 octaves). Our research results can find important applications in MIR photonics and spectroscopy, biophotonics, optical precision measurement, etc.
AB - A strip titanium dioxide (TiO2) waveguide is designed for highly coherent mid-infrared (MIR) supercontinuum (SC) generation. For the designed TiO2 waveguide, three zero-dispersion wavelengths (ZDWs) are obtained through adjusting the waveguide structure parameters. The three ZDWs are located at 1.53, 3.96, and 5.43 μm, respectively. The nonlinearity coefficient γ is calculated as 1.12 W − 1 m − 1 at wavelength 3.1 μm. By optimizing the pump pulse parameters, the highly coherent MIR SCs are generated when the hyperbolic secant pump pulse with a duration of 80 fs, peak power of 1 kW, and wavelength of 3.1 μm is launched into the TiO2 waveguide and propagated 4.2-mm in length. The obtained SC covers a wavelength range from 1.71 to 9.90 μm (more than 2.5 octaves). Our research results can find important applications in MIR photonics and spectroscopy, biophotonics, optical precision measurement, etc.
KW - TiO2 waveguide
KW - Supercontinuum generation
KW - Three zero-dispersion wavelengths
U2 - 10.1117/1.oe.61.11.117104
DO - 10.1117/1.oe.61.11.117104
M3 - Article
SN - 0091-3286
VL - 61
JO - Optical Engineering
JF - Optical Engineering
IS - 11
M1 - 117104
ER -