Документ взят из кэша поисковой машины. Адрес оригинального документа : http://ofvp.phys.msu.ru/en/science_education/diploma/annot/2007/Fedotov_Fedotov_en.pdf Дата изменения: Tue Dec 19 20:16:55 2006 Дата индексирования: Mon Oct 1 21:17:52 2012 Кодировка:

Diploma thesis abstract. Student: I.V. Fedotov. Scientific adviser: A.B. Fedotov. In this work the propagation and nonlinear interactions of nanosecond laser pulses in microstructure fibers are studied. Experiments presented in this diploma demonstrate the capability of hollow photonic crystal fibers to provide nanosecond laser pulses with a flow more than 500 J/cm2. Efficiency of nonlinear spectroscopy methods by the example of Coherent antiStokes Raman scattering was studied. Coherent anti-Stokes Raman scattering (CARS) is used to measure relations between the resonant (Raman) and nonresonant (Kerrtype) optical nonlinearities of air-guided modes in a hollow-core photonic-crystal fiber (PCF). Due to its interference nature, CARS provides a convenient tool for measuring the contribution of the fiber cladding to the total nonlinearity sensed by airguided modes in hollow PCFs. The possibility of efficient spectrum transformation of nanosecond laser pulses in photonic crystal fiber due to four-wave mixing processes and stimulated Raman scattering. New regime of effective supercontinuum was found. It is demonstrated that strong coupling of Stocs and anti-Stocs waves, arising near zero of dispersion, radically increase spectral range and the quality of supercontinuum spectrum.