Four-Wave Mixing UV Generation in Optical Microfibers

被引:0
作者
Khudus, Muhammad I. M. Abdul [1 ,2 ]
De Lucia, Francesco [1 ]
Corbari, Costantino [1 ,3 ]
Lee, Timothy [1 ]
Horak, Peter [1 ]
Sazio, Pier [1 ]
Brambilla, Gilberto [1 ]
机构
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[2] Univ Malaya, Fac Sci, Photon Res Ctr, Dept Phys, Kuala Lumpur 50603, Malaysia
[3] Renishaw Plc, Wotton Under Edge GL12 8JR, Glos, England
来源
NONLINEAR OPTICS AND ITS APPLICATIONS IV | 2016年 / 9894卷
关键词
Nonlinear optics; Parametric processes; Four-wave mixing; Optical microfibers; PHOTONIC-CRYSTAL FIBERS; SUPERCONTINUUM GENERATION; DEEP UV; ULTRAVIOLET; GLASS; AMPLIFIER;
D O I
10.1117/12.2227585
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
UV generation via four-wave-mixing (FWM) in optical microfibres (OMFs) was demonstrated. This was achieved by exploiting the tailorable dispersion of the OMF in order to phase match the propagation constant of the four frequencies involved in the FWM process. In order to satisfy the frequency requirement for FWM, a Master Oscillator Power Amplifier (MOPA) working at the telecom C-band was connected to a periodically poled silica fibre (PPSF), producing a fundamental frequency (FF) at 1550.3 nm and a second harmonic (SH) frequency at 775.2 nm. A by-product of this second harmonic generation is the generation of a signal at the third harmonic (TH) frequency of 516.7 nm via degenerate FWM. This then allows the generation of the fourth harmonic (FH) at 387.6 nm and the fifth harmonic (5H) at 310nm via degenerate and nondegenerate FWM in the OMF. The output of the PPSF was connected to a pure silica core fibre which was being tapered using the modified flame brushing technique from an initial diameter of 125 mu m to 0.5 mu m. While no signal at any UV wavelength was initially observed, as the OMF diameter reached the correct phase matching diameters, signals at 387.6 nm appeared. Signals at 310 nm also appeared although it is not phase matched, as the small difference in the propagation constant is bridged by other nonlinear processes such as self-phase and cross phase modulation.
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页数:6
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