Mr. Yi Yang Profile

Yi Yang

at Tsinghua Univ

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Proceedings Article | 3 November 2016 Paper

Parametric wavelength conversion in photonic crystal fibers

Sigang Yang, Zhaohui Wu, Yi Yang, Minghua Chen, Shizhong Xie

Proceedings Volume 10029, 100290M (2016) https://doi.org/10.1117/12.2246477

KEYWORDS: Photonic crystal fibers, Dispersion, Fiber optics, Light sources, Optical fibers, Oscillators, Optical amplifiers, Fiber amplifiers, Ocean optics, Doping

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Nonlinear wavelength conversion provides flexible solutions for generating wideband tunable radiation in novel wavelength band. Parametric process in photonic crystal fibers (PCFs) has attracted comprehensive interests since it can act as broadband tunable light sources in non-conventional wavelength bands. The current state-of-the-art photonic crystal fibers can provide more freedom for customizing the dispersion and nonlinearity which is critical to the nonlinear process, such as four wave mixing (FWM), compared with the traditional fibers fabricated with doping techniques. Here we demonstrate broadband parametric wavelength conversion in our homemade photonic crystal fibers. The zero dispersion wavelength (ZDW) of PCFs is critical for the requirement of phase matching condition in the parametric four wave mixing process. Firstly a procedure of the theoretical design of PCF with the ZDW at 1060 nm is proposed through our homemade simulation software. A group of PCF samples with gradually variable parameters are fabricated according to the theoretical design. The broadband parametric gain around 1060 nm band is demonstrated pumped with our homemade mode locked fiber laser in the anomalous dispersion region. Also a narrow gain band with very large wavelength detune with the pump wavelength in the normal dispersion region is realized. Wavelength conversion with a span of 194 nm is realized. Furthermore a fiber optical parametric oscillator based on the fabricated PCF is built up. A wavelength tunable range as high as 340 nm is obtained. This report demonstrates a systematic procedure to realize wide band wavelength conversion based on PCFs.

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