TY - JOUR
T1 - Second harmonic generation in a hollow-core fiber filled with GaSe nanosheets
AU - Hao, Zhen
AU - Ma, Yuxin
AU - Jiang, Biqiang
AU - Hou, Yueguo
AU - Li, Ailun
AU - Yi, Ruixuan
AU - Gan, Xuetao
AU - Zhao, Jianlin
N1 - Publisher Copyright:
© 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/6
Y1 - 2022/6
N2 - Frequency conversions using various all-fiber nonlinear devices can benefit many applications, including communications, sensing, microscope, and imaging. In this study, we report in-fiber second harmonic generation (SHG) in an optical hollow-core fiber (HCF) that can be used for frequency conversion. The HCF filled with a dispersion of gallium selenide (GaSe) nanosheets in the ultraviolet-cured optical adhesive supports a well-propagating mode in the fiber core, which enables effective light interaction with dispersed GaSe nanosheets and a strong SHG process. Based on theoretical analysis, the optimal HCF length for maximizing SHG is approximately 0.41 mm. The broadband SHG of the GaSe-filled HCF device is demonstrated by tuning the pump wavelength from 1460 to 1600 nm. Moreover, a time-varied SHG in the device is revealed due to additional second-order susceptibility induced by the polarization of silica. The proposed device with a compact and robust structure has the potential to be connected to existing all-fiber telecom and sensing systems for numerous nonlinear engineering applications.
AB - Frequency conversions using various all-fiber nonlinear devices can benefit many applications, including communications, sensing, microscope, and imaging. In this study, we report in-fiber second harmonic generation (SHG) in an optical hollow-core fiber (HCF) that can be used for frequency conversion. The HCF filled with a dispersion of gallium selenide (GaSe) nanosheets in the ultraviolet-cured optical adhesive supports a well-propagating mode in the fiber core, which enables effective light interaction with dispersed GaSe nanosheets and a strong SHG process. Based on theoretical analysis, the optimal HCF length for maximizing SHG is approximately 0.41 mm. The broadband SHG of the GaSe-filled HCF device is demonstrated by tuning the pump wavelength from 1460 to 1600 nm. Moreover, a time-varied SHG in the device is revealed due to additional second-order susceptibility induced by the polarization of silica. The proposed device with a compact and robust structure has the potential to be connected to existing all-fiber telecom and sensing systems for numerous nonlinear engineering applications.
KW - broadband operation wavelength
KW - gallium selenide
KW - hollow-core fiber
KW - second-harmonic generation
KW - time-varied second harmonic generation
UR - http://www.scopus.com/inward/record.url?scp=85128485413&partnerID=8YFLogxK
U2 - 10.1007/s11432-021-3331-3
DO - 10.1007/s11432-021-3331-3
M3 - 文章
AN - SCOPUS:85128485413
SN - 1674-733X
VL - 65
JO - Science China Information Sciences
JF - Science China Information Sciences
IS - 6
M1 - 162403
ER -