Passive Mode Locking of Flashlamp-Pumped Dye Lasers Tunable between 580 and 700 nm

Arthurs, Eugene G.; Bradley, Daniel; Roddie, A.G.

doi:10.1063/1.1654074

Cited by 116 publications

(26 citation statements)

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“…The frequency range covered was later extended [9] over the spectral region 580 to 700 nm with three lasing dyes Rhodamine 6G, Rhodamine B and cresyl-violet with one of the polymethine dyes, DODCI, DQTCI, DTDCI or DDCI employed as the saturable absorber for the appropriate lasing dye. To obtain the shortest duration pulses it was necessary to select both the laser mirrors and the coatings of the tuning etalons to have the optimum reflectivities at the required lasing wavelengths.…”

Section: Ilmentioning

confidence: 99%

“…The introduction of interferometric tuning [8] permitted the generation of pulses of transform-limited duration, frequency tunable from 580 to 700 nm [9], by employing rhodamine and cresyl-violet dyes with the appropriate polymethine saturable absorbers. About the same time the development of the 'Photochron' picosecond streak-camera [10][11][12] permitted direct linear measurements of pulse durations.…”

Section: Introductionmentioning

confidence: 99%

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Generation and measurement of frequency-tunable picosecond pulses from dye lasers

Bradley

1974

Opto-electronics

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Experimental techniques for the generation of frequency-tunable picosecond pulses from passively mode-locked dye lasers are reviewed. Direct photoelectric measurements of pulse durations with a streak-camera of time resolution <3 ps are described. Recent studies of the build-up of pulse shortening and of saturable absorber photochemistry are discussed and related to the mode-locking processes in dye lasers.

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Section: Ilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Generation and measurement of frequency-tunable picosecond pulses from dye lasers

Bradley

1974

Opto-electronics

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“…The flashlamp-pumped organic dye laser oscillators generate intense, frequency tunable, light pulses of several picoseconds duration and several tens of megawatt power [22,208,210,211]. Using different lasing dyes and saturable absorbers passive mode-locking has been achieved in the wavelength region between 450 and 840 nm.…”

Section: Passive Mode-locking With Saturable Absorbersmentioning

confidence: 99%

Passive Q-switching and mode-locking for the generation of nanosecond to femtosecond pulses

Penzkofer

1988

Appl. Phys. B

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Abstract. The passive and hybrid Q-switching and mode-locking of solid-state lasers, dye lasers, semiconductor lasers and gas lasers is reviewed. The dynamics of saturable absorbers and reverse saturable absorbers is illustrated. The nanosecond pulse generation by passive and hybrid Q-switching of low-gain active media is described. The picosecond and femtosecond pulse generation by passive and hybrid mode-locking in low-gain and highgain active media is analysed. The performance data of passively and hybridly mode-locked cw femtosecond dye lasers are collected. The pulse shortening of ultra-fast pulses with saturable absorbers in intra-cavity and extra-cavity configurations is discussed. PACS: 42.55The photonic switching of lasers provides an important technique to generate short light pulses in the nanosecond to femtosecond time regime. The photons generated in the laser modify the transmission of the switching elements and cause the formation of short pulses. Saturable absorbers serve as intensity or energy dependent coupling elements in most cases. But occasionally intensity and energy-dependent refractive index changes have been applied. Nanosecond light pulses are generated in passively Q-switched lasers. The passive mode-locking of laser leads to the generation of nanosecond, picosecond or femtosecond pulse trains. The actual pulse durations depend on the spectroscopic data of the active media and of the passive elements.The nonlinear response of absorbers to light radiation is introduced in the next section [1][2][3][4][5][6][7][8][9]. The passive, and the hybrid Q-switching are discussed in . The passive, and the hybrid modelocking are described in Sect. 3. A distinction is made between the mode-locking of low-gain and high-gain active media [35 45]. The simultaneous Qswitching and mode-locking is discussed shortly in Sect. 4. A final section is devoted to the intra-cavity and extra-cavity pulse shortening with saturable absorbers [46][47][48][49][50].

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“…A similar result has been reported for a Nd:YAG mode-locked [14] láser. The discrepancy can be explained for the mode-locked pulse train in terms of spectral broadening due to selfphase modulation when the láser is puinped well above the threshold [6].…”

mentioning

confidence: 99%

“…Phase-conjugation reflection with lower efficiency, has also been measured [3] in an intra-cavity saturable absorber dye cell in the experimental arrangement conunonly used for passive mode-locking of pulsed and CW dye lasers [4,5], Photoisomer effeets [6] in the saturable absorber dye were found [3] to be important in the phase-conjugation process, particularly when the láser was tuned to longer wavelengths. Martin and Hellwarth [7] have shown that thermally induced refractive Índex changes [8][9][10][11] were the dominant mechanism in a variety of liquids employed in a four-wave mixing process for image conversión from infrared to visible and more recently the influence of the thermal grating in phase conjugation was discussed by Heilweil et al [12].…”

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Thermal effects in phase-conjugation in saturable absorbers with picosecond pulses

Tocho

Sibbett

Bradley

1981

Optics Communications

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Phase conjugation reflcction with efficiencies o f 400% for microsecond pulses and ~50% Tur picosecond pulses has been obtained in saturable absorber dye Solutions. The effect o f difTcrcnt solvcnls on thc gencration o f the thermal pitase grating involved was investigated.We ltave recently reported [1] phase-conjugation [2] with conversión efficiences of up to 50% in DODCI and other saturable absorbers obtained with picosecond pulses from a mode-locked dye láser. Phase-conjugation reflection with lower efficiency, has also been measured [3] in an intra-cavity saturable absorber dye cell in the experimental arrangement conunonly used for passive mode-locking of pulsed and CW dye lasers [4,5], Photoisomer effeets [6] in the saturable absorber dye were found [3] to be important in the phase-conjugation process, particularly when the láser was tuned to longer wavelengths. Martin and Hellwarth [7] have shown that thermally induced refractive Índex changes [8][9][10][11] were the dominant mechanism in a variety of liquids employed in a four-wave mixing process for image conversión from infrared to visible and more recently the influence of the thermal grating in phase conjugation was discussed by Heilweil et al. [12]. We have investigated the role played by thermal effeets in phase conjuga tion reflection of picosecond pulses from saturable absorbers. In particular, the influence of solvents with very different thermal properties have been investigat ed together with the time behaviour of the conjugated wave.The experimental set up (fíg. 1) is similar to that reported previously [1]. The essential improvement is the use of a fast electro-optic Pockels' cell shutter between the láser and the sample cell to select out a well defined portion of the dye láser pulse train. A fast piloto diode (ITL type FD 125), PD1, was used to trigger the Pockels' cell and similar photodiodes (PD2 and PD3) monitored the probe beam intensity (¡2) and the conjúgate wave intensity (/4). A flashlamp pumped passively mode-locked dye láser [4] generated ~1 .2 ps pulses of ~100 mJ energy. In both cases, the láser was tuned by an intra-cavity etalon. The láser beam was focussed into the dye cell by lens L (f= 40 cm) and divided by a glass beam splitter 0 030-4018/81/0000-0000/$ 02.50 ©North-Holland Publishing Company 67

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Passive Mode Locking of Flashlamp-Pumped Dye Lasers Tunable between 580 and 700 nm

Cited by 116 publications

References 10 publications

Generation and measurement of frequency-tunable picosecond pulses from dye lasers

Generation and measurement of frequency-tunable picosecond pulses from dye lasers

Passive Q-switching and mode-locking for the generation of nanosecond to femtosecond pulses

Thermal effects in phase-conjugation in saturable absorbers with picosecond pulses

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