Method for Generation of femtosecond pulses of laser Light Source, and the same

摘要

Method for generating femtosecond Light pulses, which comprises at least two stages of optical Parametric amplification (OPA)In the Parametric Amplification is performed in a First Stage OPA conducting optically synchronized Radiation pulses First SEED (9) and First Pumping Radiation (7) to a PFirst non-linear Crystal (3) that overlap in time and Space, satisfying conditions of non collinear Phase matching.Parametric Amplification was performed in a Second Stage OPA conducting optically synchronized Radiation pulses of Second SEED (28) and second Pumping Radiation (10) to a Second CRistal nonlinear (4) that overlap in time and Space satisfying conditions of non collinear Phase matching.Outgoing Radiation Pulse Wave Signal amplified in a final stage of Opa, which is at least the second stage BID, compress to output pulses of femtosecondWhere the first and second Radiation SEED (9, 28) and first and second Pumping Radiation (710) originate from a single laser Source (1) dividing the primary Radiation of ultrashort (11) the primary source of laser (1) with a power divider (12) (13) or radiationN Seed Radiation arm and an arm (14) pumpingThe First Radiation SEED (9) for the first stage OPA is delaying time of the Radiation pulses (13) Arm of seedWhile the first Pumping Radiation (7) for the first stage OPA is Amplifying and Doubling the frequency of the Radiation (14) of the pump arm in a Second GeneratorRmu00f3nico (20),The Second Radiation SEED (28) for the second stage OPA compressing pulses in the form of Long Wave Radiation Amplified Signal (24) in said First non-linear Crystal (3) fOtmar Radiation pulse femtosecond (26) and also by Spectral widening of a portion (30) of the Radiation PULSE GENERATOR (26) a femtosecond White Light (6) to create RadiAtion spectrally Expanded (27) with Band width of not less than 300 nm and heading towards the second nonlinear Crystal (4) directly or through a First pulse Conditioner (33),In this laser Source (1) is a primary source of Low Energy laser Radiation of ultrashort,Characterized by selecting a Central Wavelength of the Radiation u03bb0 ultrashort (11) of the laser Source (1) to superimpose a primary Peak of Stimulated Emission of a medium.Vo High Gain Solid State, and its Spectral width u0394u03bb0 corresponds to a Pulse duration was limited to 1PS 3PS,The formation of the first Radiation SEED (9) (13) of the Radiation ARM further comprises Seed to widen their Spectrum (10u00f720 nm bandwidth)A Spectral bandwidth of the Radiation arm (14) of the pump, which is Amplified during the formation of the first Radiation Pumping (7), not exceeding 1nm,The Second Pumping Radiation (10) to create the pulse duration in the range femtosecondIt is formed from the amplified in the first stage of Opa and compressed pulse femtosecond Radiation (26) Separating part (31) by a power divider (29) and heading towards aSecond Harmonic Generator (32) for Doubling frequencyThe Frequency doubled Radiation towards the second nonlinear Crystal (4) directly or through a Second Conditioning pulses (34)The relationship of pulse durations of pumping and Seed is in a range of 1 to 10, which is achieved by the first and / or second Conditioning pulse (3334) that include pulse Compressors and / or dilators of pulse; Pulse Wave Signal, amplified in the end at least in the second nonlinear Crystal (4),Compressed in time to form output pulses with a duration of 5fs to 100fs.