Effect of phase modulation of femtosecond pump pulses on the spectral and coherence properties of super-continuum with strongly pronounced soliton structures in its spectrum

Sergey Kobtsev; Sergey Kukarin; Nikolay Fateev; Sergey Smirnov

doi:10.1117/12.740160

13 April 2007 Effect of phase modulation of femtosecond pump pulses on the spectral and coherence properties of super-continuum with strongly pronounced soliton structures in its spectrum

Sergey Kobtsev, Sergey Kukarin, Nikolay Fateev, Sergey Smirnov

Author Affiliations +

Proceedings Volume 6612, Laser Optics 2006: Diode Lasers and Telecommunication Systems; 66120C (2007) https://doi.org/10.1117/12.740160
Event: Laser Optics 2006, 2006, St. Petersburg, Russian Federation

Abstract

In this paper it was for the first time experimentally proven that chirp of pumping femtosecond pulses has considerable effect on the degree of coherence of short-wavelength part of super-continuum (SC) with strongly expressed soliton structures in its spectrum. At the same time the soliton component of super-continuum retains full coherence when the chirp of pumping radiation is varied. The broadest spectrum width of SC and the highest degree of coherence of the short-wavelength components of SC are achieved at small positive values of the chirp parameter. The noise-to signal ratio of SC was analyzed with the help of numerical simulation and it was found that at the optimal near-zero chirp value the degree of coherence of our SC is sufficient for metrology applications.

Citation Download Citation

Sergey Kobtsev, Sergey Kukarin, Nikolay Fateev, and Sergey Smirnov "Effect of phase modulation of femtosecond pump pulses on the spectral and coherence properties of super-continuum with strongly pronounced soliton structures in its spectrum", Proc. SPIE 6612, Laser Optics 2006: Diode Lasers and Telecommunication Systems, 66120C (13 April 2007); https://doi.org/10.1117/12.740160

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