Single-mode Chalcogenide Fiber: Fabrication and Supercontinuum Generation

doi:10.15541/jim20170249

Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (6): 678-682.DOI: 10.15541/jim20170249

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Single-mode Chalcogenide Fiber: Fabrication and Supercontinuum Generation

CHEN Wei^1,2, ZHU Ning³, ZHAO Zhe-Ming³, ZHANG Pei-Qing^2,4, WANG Xun-Si^2,4, DAI Shi-Xun^2,4

1. College of Electrical Engineering, Hunan Provincial Key Laboratory of Grids Operation and Control on Multi-Power Sources Area, Shaoyang Universitty;
2. Laboratory of Infrared Material and Devices, Ningbo University, Ningbo 315211, China;
3. Nanhu College, Jiaxing University, Jiaxing 314001, China;
4. Key Laboratory of Optoelectronic Detection Materials and Devices of Zhejiang Province, Ningbo 315211, China;

Received:2017-05-18 Revised:2017-08-19 Published:2018-06-20 Online:2018-05-24
About author:CHEN Wei. E-mail: 2569@hnsyu.edu.cn
Supported by:
National Natural Science Foundation of China (61377099, 61627815, 61705091);Opened Key-Subject Construction Fund of Zhejiang Province, China (xkxl1508);Opening Project of Key Laboratory of Optoelectronic Detection Materials and Devices of Zhejiang Province(2017004);Program for Science and Technology of Jiaxing City (2017AY13010);Key Project of Nanhu College, Jiaxing University

Abstract

Abstract:

Chalcogenide (ChG) glasses are well known for their unique characteristics in infrared (IR) and strong nonlinearities, endowing them as promising candidates for Mid-IR supercontinuum generation (SCG). Here, step-index As-S fiber with a small core was fabricated via twice-extrusion method. The fiber is single-mode when the propagating light wavelength is longer than 6.3 μm. Loss baseline of the step-index fiber is about 1 dB/m. Zero-dispersion-wavelength (ZDW) of the fiber is located at near 5.2 μm. By pumping the fiber with a femtosecond laser of optical parametric amplifier (OPA), Mid-IR SCG was investigated in multi-length scale fibers with different pumping wavelengths. Launching intense ultra-short pulses (~150 fs, 1 kHz) into a 23-cm-long fiber, Mid-IR SC spanning from 1.5 μm to 8.7 μm can be observed when pumping at a central wavelength of either 4.5 μm or 5.2 μm, corresponding to absorption peak at normal dispersion regime and ZDW, respectively. Besides, the spectra spanning would be extended in shorter fiber length under optimized pumping laser power. For ChG glass fiber, shorter fiber length is much more suitable for SC spanning than longer fiber length.

Key words: chalcogenide glass, single-mode fiber, supercontinuum generation

CLC Number:

TN213

CHEN Wei, ZHU Ning, ZHAO Zhe-Ming, ZHANG Pei-Qing, WANG Xun-Si, DAI Shi-Xun. Single-mode Chalcogenide Fiber: Fabrication and Supercontinuum Generation[J]. Journal of Inorganic Materials, 2018, 33(6): 678-682.

Figures/Tables 6

Fig. 1 Schematic of extrusion process extruded once (a)-(c), and twice (e)-(g)Yellow refers to fiber core and red refers to coating glass

Fig. 2 Experimental set-up for supercontinuum generation

Fig. 3 Parameter of the fiber: (a) refractive index and NA; (b) dispersion & V

Fig. 4 (a) Cross-section image of the fiber and (b) measured optical loss in the fiber

Fig. 5 Experimental supercontinuum generation results of fiber with different fiber-lengthes(a) Pumped by 4.5 μm at normal dispersion regime; (b) Pumped by 5.2 μm at ZDW

Fig. 6 Experimental supercontinuum generation results of fibers under different pump-powers

References 19

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Single-mode Chalcogenide Fiber: Fabrication and Supercontinuum Generation

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