Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7132467 | Optics and Lasers in Engineering | 2016 | 5 Pages |
Abstract
In this paper, we present theoretically a simple and passive method to modulate the output spectrum of a broadband multi-pass Ti:S amplifier by means of polarization-dependent gain and optical rotator dispersion (ORD). By choosing the ORD and two Ï-polarization wavelengths, we can shape the effective gain section flexibly in order to suppress spectral narrowing and red-shift effects. Our simulations show the amplifier we have designed can scale a 0.4Â nJ, 10Â fs seed pulse up to 3.31Â mJ almost without spectral narrowing and central wavelength-shift. Increasing the difference of the two Ï-polarization wavelengths can result in the saddle output spectrum with a span of about 149Â nm, which is very helpful for further laser amplification to avoid spectral narrowing.
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Authors
Shuiqin Zheng, Xuanke Zeng, Xinjian Pan, Jingzhen Li, Yi Cai, Guoliang Zheng, Shixiang Xu,