Supercontinuum generation of femtosecond pulse in high nonlinear fiber

Abstract

Abstract:

The supercontinuum generation in high nonlinear fiber with the normal dispersion has been investigated the split-step Fourier method. The effect of the peak power of pump pulse, pulse width and the frequency chirp on the characteristics of the supercontinuum spectrum is analyzed. The research results show that the pulse width, peak power and initial chirp of the pump pulse are very important to flat wideband supercontinuum generation. With the increase of the peak power, the spectral width becomes wider (170nm to more than 400nm at-20dB) and the flatness of supercontinuum becomes better. By contrast, the spectral width becomes narrower and the flatness of supercontinuum becomes worser when the pulse width increases gradually. The negative initial chirp is profitable for spectrum broadening, but the positive chirp is a certain impact on spectrum broadening. It is further investigated that a broadband and flat supercontinuum without residual pump was generated from such a high nonlinear fiber pumped at the normal dispersion region.

Key words: optical communication; high nonlinear fiber;supercontinuum spectrum; chirp

JIANG Guang-Yu, CHEN Feng-Ying, XIAO Hui-Rong, CHAI Ming-Gang. Supercontinuum generation of femtosecond pulse in high nonlinear fiber[J]. J4, 2010, 27(2): 198-203.

References

[1] Gross B,Manassah J T.Supercontinuum in the anomalous group velocity dispersion region

[J]. J Opt Soc Am B, 1992, 9(10):1813-1818.

[2]Morioka T,Mori K,Kawanishi S,et al. Multi WDM channel, Gbit/s pulse generation from a single laser source utilizing LD-pumped supercontinuum in optical fibers

[J]. IEEE Photon Technol Lett, 1994, 6 (3):365-368.

[3]Xu Yong-zhao,Xu Wen-cheng,Yu Bin-tao,et al. Study on supercontinuun generation in dispersion-flattened and decreasing fiber

[J]. Chinese Journal of Quantum Electronics(量子电子学报),2004,21(6):863-866 (in chinese).

[4]TakushimaY,Futami F,Kikuchi K. Generation of over 140nm wide supercontinuum from a normal dispersion fiber by using a mode locked semiconductor laser source

[J]. IEEE Photon TechnolLett, 1998, 10(11):1560-1562.

[5] Song Xue-peng,Lin Jian-fei,Chen Bo,et al. Supercontinuum generation in two holey microstructure fibers pumped by femtosecond pulses

[J]. Chinese Journal of Quantum Electronics(量子电子学报),2006,23(5):692-695 (in chinese).

[6]Fumio F,Yuichi Takushima,Kazuro Kikuchi. Generation of wideband and flat supercontinuum over a 280 nm spectral range from a dispersion flattened optical fiber with normal group velocity dispersion

[J].IEICE Trans Electron,1999, 8(22):1531-1538.

[7] Zhang Weili,Zhang Ruobing,Wang Qingyue,et al.Four-photon parametric emission in the femtosecond supercontinuum

[J]. Chinese Journal of Quantum Electronics(量子电子学报),1995,12(3):278-282 (in chinese).

[8]Boyraz O,Kim J,Islam,etal.10 Gbit/s multiple wavelength,coherent short pulse source based on spectral carving of supercontinuum generated in fibers

[J].J LightwaveTechnol,2000,18(12):2167-2175.

[9]Gross B, Manassah J.Supercontinuum in the anomalous group-velocity dispersion region

[J]. J Opt Soc Am B, 1992,9(10):1813-1818.

[10]Morioka.T,Kawanishi.S,Mori. K,et al.Nearly penalty-free,less than4ps supercontinuum Gbit/s pulse generation over 1535-1560 nm

[J]. Eleetron.Lett.,1994,30(10):790-791.

[11] MussotA, Sylvestre T , Provino L,etal.Generation of a broadband single mode supercontinuum in a conventional dispersion-shifted fiber by use of a subnanosecondmicrochip laser
[J].Opt Lett,2003,28(19): 1820-1822.

[12]Birks.T,Wadsworth.W,Russell.P.Supercontinuum generation in tapered fibers

[J]. Opt. Lett. 2000,25(19): 1415-1417.

[13] Nicholson.J,Yan.M,Wisk.P,et al.All-fiber,octave-spanning supercontinuum

[J].Opt.Lett., 2003, 28(8): 643-645

[14]Abeeluck A K, Headley C, Jørgensen C G. High power supercontinuum generation in highly nonlinear, dispersion-shifted fibers by use of a continuous-wave Raman fiber laser

[J].Opt Lett,2004,29(18):2163-2165.

[15]Abeeluck A K, Headley C.Continuous wave pumping in the anomalous and normal dispersion regimes of nonlinear fibers for supercontinuum generation

[J].Opt Lett,2004,30(1):61-63.

[16] Jia Guang-ming,Jia Dong-fang,Li Shi-chen .Highly nonlinear optical fibers and their applications

[J]. Study On Optical Communications(光通信研究),2003,1(115):43-46 (in chinese).

[17]Zhang Jie,Hao Zuo-qiang,Yuan Xiao-hui,et al. Propagation of intense femtosecond laser pulses in air

[J]. Chinese Journal of Quantum Electronics(量子电子学报),2006,23(3): 282-294 (in chinese).

[18]Agrawl G. P. Nonlinear Fiber Optics

[M].2nd ed.New York:Academic Press,1995.