Self-phase modulation in a thin fused silica plate upon interaction with a converging beam of down-chirped femtosecond radiation
- P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region (Russian Federation)
- M. V. Lomonosov Moscow State University, Moscow (Russian Federation)
- Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)
The mechanism of spectral broadening and self-compression of down-chirped femtosecond pulses in the visible range (473 nm) upon nonlinear interaction of a converging Gaussian beam with a 1-mm-thick fused silica plate is experimentally and theoretically investigated. It is found experimentally that when the intensity increases and plasma is formed in the sample, the regime of femtosecond pulse splitting is transformed into the single-pulse generation regime during nonlinear interaction. As a result of selfcompression, the duration of the initial transform-limited pulse is reduced by a factor of 3. Based on the numerical solution of the generalised nonlinear Schrödinger equation, with the plasma formation disregarded, it is shown that the profile, spectrum and temporal phase of the pulse transmitted through the sample acquire a stationary shape behind the focal plane of the focusing mirror. The calculation results are in good agreement with experimental data. The possibility of parametric amplification of the pulse spectral components under given experimental conditions is discussed. (extreme light fields and their applications)
- OSTI ID:
- 22551249
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 45, Issue 5; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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