Title :
Intense multi-sidebands in a femtosecond Cr/sup 4+/:YAG laser
Author :
Ishida, Y. ; Naganuma, K. ; Kamada, H.
Author_Institution :
Toyama Nat. Coll. of Maritime Technol., Japan
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
We report on the formation of Stokes and anti-Stokes sideband components extending over 20 THz about the center frequency (about 1.54 /spl mu/m) of the femtosecond pulse Cr/sup 4+/:YAG laser. One of the most interesting findings is that the coherent Stokes sideband around 1.65 Clm (13.5 THz in shift), depending on cavity dispersions, is greatly enhanced by stimulated Raman process in the Cr/sup 4+/:YAG rod, which has been observed and assigned to this laser system for the first time. The measured frequency shifts for all sidebands are well explained by four-wave mixing (FWM) coupled with stimulated Raman process in the laser rod, accompanied by the resonance effect of the soliton and dispersive wave (SDR) in the soliton-like modelocked laser.
Keywords :
chromium; laser cavity resonators; laser mode locking; multiwave mixing; optical pulse generation; optical pumping; optical solitons; solid lasers; stimulated Raman scattering; 1.54 mum; 1.65 mum; 20 THz; Cr/sup 4+/:YAG laser; Stokes sideband components; YAG:Cr; YAl5O12:Cr; anti-Stokes sideband components; cavity dispersions; center frequency; coherent Stokes sideband; dispersive wave; femtosecond laser; femtosecond pulse laser; four-wave mixing; frequency shifts; intense multi-sidebands; laser rod; laser system; resonance effect; soliton and dispersive wave; soliton-like modelocked laser; stimulated Raman process; Bandwidth; Chromium; Dispersion; Frequency; Optical pulses; Optical solitons; Pulse measurements; Shape; Space vector pulse width modulation; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.811377
