Amplification of picosecond dye laser pulses

Adrain, R. S.; Arthurs, Eugene G.; Bradley, Daniel; Roddie, A.G.; Taylor, J.R.

doi:10.1016/0030-4018(74)90376-9

Cited by 32 publications

(6 citation statements)

References 3 publications

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“…The organic dye DODCI (3,3'-diethyloxadicarbocyanine iodide) [1,2] is widely used as a saturable absorber in passively mode-locked pulsed dye lasers [3,4] and c.w. dye lasers [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Saturable absorption dynamics of DODCI

Penzkofer

Bäumler

1991

Opt Quant Electron

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The saturable absorption dynamics of DODCI in a femtosecond dye laser is studied theoretically. The N-isomer and P-isomer photoisomerization dynamics is included. The wavelength region between 570 nm and 650 nm is considered where the N-isomer and P-isomer absorption dynamics changes from short-wavelength to longwavelength So-Si excitation. The slow saturable absorber DODCI shortens a circulating pulse in a laser oscillator down to femtosecond duration if the gain medium compensates the absorber losses. Fast local relaxation in the S 1 -state in the case of short-wavelength excitation and fast level refilling in the S^state in the case of longwavelength excitation facilitate the pulse shortening and the background signal suppression. In some papers [3, 11, 15, 16] the bleaching of the ground-state P-isomer absorption is thought to be responsible for the picosecond and femtosecond pulse generation in passively mode-locked rhodamine 6G dye lasers in the wavelength region above 600 nm. IntroductionIn this paper a detailed numerical analysis of the saturable absorption dynamics of DODCI in the wavelength region between 570 nm and 650 nm is given. The single transit of a pulse through the absorber and the repetitive passage of a pulse circulating in an oscillator are studied. The N-isomer-P-isomer photoisomerization dynamics is included [13,14]. In the long-wavelength absorption region the bleaching dynamics of the fraction of molecules interacting with the laser light is considered [17,18]. It is found that the slow saturable absorber is able to shorten nanosecond Gaussian pulses down to femtosecond pulses in multiple passages if the gain medium compensates the absorber losses. The fast relaxation of the excited Franck-Condon level in the S,-state in the case of short-wavelength excitation, and the fast spectral cross-relaxation in the S 0 -ground state in the case of

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Section: Introductionmentioning

confidence: 99%

“…dye lasers [5][6][7][8]. It is applied in the wavelength region between 574 nm [9] and 645 nm [4]. Especially in a prism balanced colliding-pulse mode-locked rhodamine 6G ring dye laser pulse durations down to 20 fs have been generated around 620 nm using DODCI as the mode-locking dye [10,11].…”

Section: Introductionmentioning

confidence: 99%

Saturable absorption dynamics of DODCI

Penzkofer

Bäumler

1991

Opt Quant Electron

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“…Comparison of pumping geometries 79 2-9 Spatial profile of the pump beam Log of data and best fit line 128 [3][4][5][6] Solvent dependence of the gain storage time 130 [3][4][5][6][7] Pump intensity dependence of the peak gain In this thesis, the amplification of subpicosecond laser pulses using ultrashort synchronized pump pulses will be investigated both experimentally and theoretically.…”

Section: -8mentioning

confidence: 99%

“…Angular dependence of frequency doubling 55 [2][3][4] Intensity dependence of frequency doubling 57 [2][3][4][5] Oscillator pulse formation 59 [2][3][4][5][6] Comparison of synchronous amplifier systems 63 [2][3][4][5][6][7] Three stage dye amplifier system 75 …”

Section: -3mentioning

confidence: 99%