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Highly nonlinear bismuth-oxide fiber for supercontinuum generation and femtosecond pulse compression

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7 Author(s)
Gopinath, Juliet T. ; Res. Lab. of Electron., Massachusetts Inst. of Technol., Cambridge, MA, USA ; Shen, H.M. ; Sotobayashi, H. ; Ippen, E.P.
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Highly nonlinear normally dispersive bismuth-oxide fiber shows promise for applications such as supercontinuum generation and femtosecond pulse compression in the telecommunications-wavelength range. To generate a wideband and flat supercontinuum spectrum, the balance between fiber nonlinearity and normal group velocity dispersion (GVD) is important. Highly nonlinear bismuth-oxide fiber exhibits a large nonlinearity due to the small effective area and nonlinear index of the host glass material. The fiber also has a relatively flat dispersion profile over a large wavelength range. Utilizing these features, we generate a smooth unstructured supercontinuum between 1200 and 1800 nm. This supercontinuum is passed through a grating pair, and pulses, originally of 150-fs length, are compressed to 25 fs.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 11 )