A tunable, highly monochromatic picosecond light source

Szatmàri, S.; Schaefer, F. P.

doi:10.1016/0030-4018(84)90192-5

Cited by 27 publications

(7 citation statements)

References 5 publications

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“…Frequency-tunable picosecond light pulses may be generated in mode-locked dye laser oscillators [1][2][3], in distributed feedback dye lasers [4], in dye laser generators [5][6][7][8][9][10] and in parametric generators [11][12][13]. Pulsed dye laser amplifiers [14][15][16] and parametric amplifiers [11,12] are used to raise the laser signals to high power levels.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical investigation of tunable picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers

et al. 1988

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Picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers is studied experimentally and theoretically. Frequency-tunable pulses between 720 and 940 nm are generated with a picosecond ruby laser pump source. The amplification of spontaneous emission and of seeding pulses in the generator and amplifier cells is investigated. Stimulated emission cross-sections and excited-state absorption cross-sections are determined by computer simulations. The coherence properties of the generated radiation are analysed. Resonance Raman contributions are resolved.

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Section: Introductionmentioning

confidence: 99%

Experimental and theoretical investigation of tunable picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers

et al. 1988

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“…The overall duration is Jt F~9 ps (FWHM). The generation of pulse durations shorter than the pump pulse duration is due to the high amplification of fluorescence light [14][15][16][17][18][19] and is supported by the short fluorescence lifetime of the dye. The amplifiers Al to A3 broaden the pulse duration from 9 ps after the generator to about 20 ps after the third amplifier (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The output pulses are amplified in three longitudinally pumped dye cells, then spectrally filtered with a grating spectrometer and finally reamplified in a fourth dye amplifier in order to generate intense frequency tunable picosecond light pulses. The arrangements applying amplified spontaneous emission (ASE) may be grouped into longitudinally pumped [8][9][10], transversally pumped [11][12][13], and travelling-wave transversally pumped systems [14][15][16][17][18]. In longitudinally pumped systems the amplification of spontaneous emission is limited by excitedstate absorption of the pump laser light [19].…”

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confidence: 99%

A versatile dye-laser generator-amplifier system for intense, tunable picosecond pulse generation

1987

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Abstract. Passively mode-locked ruby-laser pulses are used to generate nearly diffractionlimited picosecond light pulses in a dye cell by longitudinally amplified spontaneous emission. The output pulses are amplified in three longitudinally pumped dye cells, then spectrally filtered with a grating spectrometer and finally reamplified in a fourth dye amplifier in order to generate intense frequency tunable picosecond light pulses. The arrangements applying amplified spontaneous emission (ASE) may be grouped into longitudinally pumped [8][9][10], transversally pumped [11][12][13], and travelling-wave transversally pumped systems [14][15][16][17][18]. In longitudinally pumped systems the amplification of spontaneous emission is limited by excitedstate absorption of the pump laser light [19]. In transversally excited dye cells the duration of the amplified spontaneous emission signal is restricted by the transit time of light through the pumped region, and two pulses are emitted in opposite directions. The travelling-wave transverse pumping technique uses a grating for matching the propagation of the pump pulse and the amplified spontaneous emission signal. It avoids the drawbacks of longitudinal (excited-state absorption of pump pulse) and transverse pumping (limitation of duration, double pulsing). PACSIn this paper we describe a versatile longitudinally pumped dye laser generator-amplifier system that generates intense frequency tunable picosecond light pulses and avoids the problems of pump-pulse excitedstate absorption. The light generation is initiated by amplified spontaneous emission in a dye generator cell. The output signal is amplified in a chain of longitudinal amplifiers, and spectrally narrowed and tuned with a spectrometer. Overall conversion efficiencies (output dye-laser pulse energy to total input pump pulse energy) of about 10% are achieved. Amplification ConsiderationsThe light generation in a longitudinally pumped dye generator cell is limited by excited-state absorption. Pump-laser

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“…The use of highly concentrated dyes in thin cells of variable thickness as saturable absorbers may be very interesting in situations where saturable absorbers with fast monomeric absorption recovery time are not available. In recently reported experiments the occurance of strong transverse amplified spontaneous emission was applied to picosecond-pulse generation [30][31][32][33].…”

Section: Discussionmentioning

confidence: 99%

Saturable absorbers with concentration-dependent absorption recovery time

Penzkofer

1986

Appl. Phys. B

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Abstract. The ground-state bleaching of highly concentrated rhodamine 6G solutions in methanol is studied with intense picosecond light pulses. The ground-state recovery time changes with concentration from about 3.9 ns at low concentration (10~5 mol/dm 3 ) to about 1 ps at high concentration (0.6 mol/dm 3 ). The shortening of the absorption recovery time is determined by the concentration dependent quenching of the S 1 -state population due to unbound dimers and by the intensity dependent longitudinal and transverse amplified spontaneous emission. 42.65, 42.70, 42.20 The bleaching of absorbing media by intense light pulses is a general phenomenon. The only requirement for reduction of absorption with increasing light signal is that the ground-state absorption cross-section is larger than the excited-state absorption cross-section [1][2][3][4][5]. For laser pulse durations At L short compared to the absorption recovery time z A the bleaching behavior is determined by the input pulse energy density e [6]. At a pulse energy density s s = hv L /

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A tunable, highly monochromatic picosecond light source

Cited by 27 publications

References 5 publications

Experimental and theoretical investigation of tunable picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers

Experimental and theoretical investigation of tunable picosecond pulse generation in longitudinally pumped dye laser generators and amplifiers

A versatile dye-laser generator-amplifier system for intense, tunable picosecond pulse generation

Saturable absorbers with concentration-dependent absorption recovery time

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