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Generation of Second-Harmonics Near Ultraviolet Wavelengths From Femtosecond Pump Pulses
- Source :
- IEEE Photonics Technology Letters. 28:1719-1722
- Publication Year :
- 2016
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2016.
-
Abstract
- 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 $P_{\mathrm {av}}$ of 500 mW and center wavelength $\lambda _{\mathrm {p}}$ of 820 nm are used, the maximum conversion efficiency $\eta _{\mathrm {SH}} ^{^{^{}}}$ of the second harmonics centered at 410 nm can be up to $1.6\times 10^{-6}$ , corresponding to the output power $P_{\mathrm {SH}}$ of 520 nW. By measuring $P_{\mathrm {SH}}$ at different PCF lengths and studying the temporal dependence of $P_{\mathrm {SH}}$ , 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 core-air-silica cladding interface of PCF. Finally, a theoretical model is established to analyze the nonlinear optical process.
- Subjects :
- Physics
business.industry
Energy conversion efficiency
Physics::Optics
Nonlinear optics
Optical polarization
02 engineering and technology
Polarization (waves)
01 natural sciences
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
010309 optics
Wavelength
020210 optoelectronics & photonics
Optics
Harmonics
0103 physical sciences
Femtosecond
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Atomic physics
business
Photonic-crystal fiber
Subjects
Details
- ISSN :
- 19410174 and 10411135
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- IEEE Photonics Technology Letters
- Accession number :
- edsair.doi...........c44bc496082ae5095454eae436ed08ae
- Full Text :
- https://doi.org/10.1109/lpt.2016.2530744