TY - JOUR
T1 - Generation of Second-Harmonics Near Ultraviolet Wavelengths from Femtosecond Pump Pulses
AU - Yuan, Jinhui
AU - Sang, Xinzhu
AU - Wu, Qiang
AU - Zhou, Guiyao
AU - Li, Feng
AU - Yu, Chongxiu
AU - Wang, Kuiru
AU - Yan, Binbin
AU - Han, Ying
AU - Tam, Hwa Yaw
AU - Wai, Alex
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grant 61307109 and Grant 61475023, in part by the Beijing Youth Top-Notch Talent Support Program under Grant 2015000026833ZK08, in part by the Natural Science Foundation of Beijing under Grant 4152037, in part by the Fund of State Key Laboratory of Information Photonics and Optical Communications within the Beijing University of Posts and Telecommunications, China, under Grant IPOC2015ZC06, in part by the Hong Kong Scholars Program 2013 under Grant PolyU G-YZ45, and in part by the Research Grant Council, Hong Kong, under Grant PolyU5272/12E.
Publisher Copyright:
© 2016 IEEE.
PY - 2016/8
Y1 - 2016/8
N2 - Second-harmonic generation (SHG) near ultraviolet wavelengths is experimentally demonstrated by coupling femtosecond pump pulses into the normal dispersion region far away from the zero-dispersion wavelength of the fundamental mode in a silica photonic crystal fiber (PCF) fabricated in our laboratory. When the pump pulses with average input power Pav of 500 mW and center wavelength λp of 820 nm are used, the maximum conversion efficiency ηSH of the second harmonics centered at 410 nm can be up to 1.6 × 10-6, corresponding to the output power PSH of 520 nW. By measuring PSH at different PCF lengths and studying the temporal dependence of PSH, it is confirmed that the physical mechanism of SHG is dominated by surface nonlinearity polarization, which is resulted from the local inhomogeneities in the silica core region and at the coreair-silica cladding interface of PCF. Finally, a theoretical model is established to analyze the nonlinear optical process.
AB - Second-harmonic generation (SHG) near ultraviolet wavelengths is experimentally demonstrated by coupling femtosecond pump pulses into the normal dispersion region far away from the zero-dispersion wavelength of the fundamental mode in a silica photonic crystal fiber (PCF) fabricated in our laboratory. When the pump pulses with average input power Pav of 500 mW and center wavelength λp of 820 nm are used, the maximum conversion efficiency ηSH of the second harmonics centered at 410 nm can be up to 1.6 × 10-6, corresponding to the output power PSH of 520 nW. By measuring PSH at different PCF lengths and studying the temporal dependence of PSH, it is confirmed that the physical mechanism of SHG is dominated by surface nonlinearity polarization, which is resulted from the local inhomogeneities in the silica core region and at the coreair-silica cladding interface of PCF. Finally, a theoretical model is established to analyze the nonlinear optical process.
KW - Photonic crystal fiber (PCF)
KW - second-harmonic generation (SHG)
KW - surface nonlinearity polarization
UR - http://www.scopus.com/inward/record.url?scp=84976559385&partnerID=8YFLogxK
U2 - 10.1109/LPT.2016.2530744
DO - 10.1109/LPT.2016.2530744
M3 - Journal article
AN - SCOPUS:84976559385
SN - 1041-1135
VL - 28
SP - 1719
EP - 1722
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 16
ER -