Simultaneous two-wavelength selection in the N2 laser-pumped dye laser

Pilloff, Herschel S.

doi:10.1063/1.1654402

Cited by 57 publications

(6 citation statements)

References 10 publications

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“…Several techniques have been reported for obtaining two or more wavelengths simultaneously from a single dye laser [1][2][3][4]. These techniques have used a number of wavelength selective elements in the dye laser cavity.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of energy transfer in dye mixtures in monomer and polymer matrices under pulsed laser excitation

Kailasnath

John

Radhakrishnan

et al. 2008

Journal of Photochemistry and Photobiology A: Chemistry

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This study was conducted to identify the concentration dependence of the operating wavelengths and the relative intensities in which a dye mixture doped polymer optical fibre can operate. A comparative study of the radiative and Forster type energy transfer processes in Coumarin 540:Rhodamine 6G, Coumarin 540:Rhodamine B and Rhodamine 6G:Rhodamine B in methyl methacrylate (MMA) and poly(methyl methacrylate) (PMMA) was done by fabricating a series of dye mixture doped polymer rods which have two emission peaks with varying relative intensities. These rods can be used as preforms for the fabrication of polymer optical fibre amplifiers operating in the multi-wavelength regime. The 445 nm line from an Nd:YAG pumped optical parametric oscillator (OPO) was used as the excitation source for the first two dye pairs and a frequency doubled Nd:YAG laser emitting at 532 nm was used to excite the Rh 6G:Rh B pair. The fluorescence lifetimes of the donor molecule in pure form as well as in the mixtures were experimentally measured in both monomer and polymer matrices by time-correlated single photon counting technique. The energy transfer rate constants and transfer efficiencies were calculated and their dependence on the acceptor concentration was analysed. It was found that radiative energy transfer mechanisms are more efficient in all the three dye pairs in liquid and solid matrices.

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Section: Introductionmentioning

confidence: 99%

A comparative study of energy transfer in dye mixtures in monomer and polymer matrices under pulsed laser excitation

Kailasnath

John

Radhakrishnan

et al. 2008

Journal of Photochemistry and Photobiology A: Chemistry

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“…The typical approach to realize simultaneous multicolor lasing is using a dispersive or diffractive wavelength filter such as a prism or grating, either intracavity or in an external feedback cavity. Such a technology has been implemented in conventional lasers with different gain media such as dye [10][11][12][13], solid-state [14][15][16][17], semiconductor [18,19], and fiber [20][21][22]. However, the wavelength tunability of these lasers is limited by the bandwidth of the gain medium.…”

Section: Introductionmentioning

confidence: 99%

Storage ring two-color free-electron laser

Yan

Hao

et al. 2016

Phys. Rev. Accel. Beams

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We report a systematic experimental study of a storage ring two-color free-electron laser (FEL) operating simultaneously in the infrared (IR) and ultraviolet (UV) wavelength regions. The two-color FEL lasing has been realized using a pair of dual-band high-reflectivity FEL mirrors with two different undulator configurations. We have demonstrated independent wavelength tuning in a wide range for each lasing color, as well as harmonically locked wavelength tuning when the UV lasing occurs at the second harmonic of the IR lasing. Precise power control of two-color lasing with good power stability has also been achieved. In addition, the impact of the degradation of FEL mirrors on the two-color FEL operation is reported. Furthermore, we have investigated the temporal structures of the two-color FEL beams, showing simultaneous two-color micropulses with their intensity modulations displayed as FEL macropulses.

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“…The primary motivation for the use of mixture of dyes as lasing medium was either an improvement in the laser performance or the possibility of multifrequency operation [2]. Even though a number of techniques exist for obtaining two or more wavelengths simultaneously from a single dye laser, they use several wavelength selective elements in the dye laser cavity [3][4][5]. The use of dye mixture doped transparent polymers in solid-state dye lasers and polymer optical fibre amplifiers can be a very good method to extend these conventional approaches.…”

Section: Introductionmentioning

confidence: 99%

Excitation wavelength dependence of energy transfer in dye mixture doped polymer optical fibre preforms

Kailasnath

Kumar

Nampoori

et al. 2008

Journal of Photochemistry and Photobiology A: Chemistry

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Dependence of energy transfer parameters on excitation wavelength has been investigated in poly (methyl methacrylate) (PMMA) optical fibre preforms doped with C 540:Rh B dye mixture by studying the fluorescence intensity and the lifetime variations. A fluorescence spectrophotometer was used to record the excitation spectra of the samples for the emission wavelengths 495 and 580 nm. The fluorescence emission from the polymer rods was studied at four specific excitation wavelengths viz; 445, 465, 488 and 532 nm. The fluorescence lifetime of the donor molecule was experimentally measured in polymer matrix by time correlated single photon counting technique. The energy transfer rate constants and transfer efficiencies were calculated and their dependence on the acceptor concentration was analysed for three excitation wavelengths. It was found that any change in the excitation wavelength leads to significant variations in the quenching characteristics, which in turn affect the calculated energy transfer parameters.

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Simultaneous two-wavelength selection in the N2 laser-pumped dye laser

Cited by 57 publications

References 10 publications

A comparative study of energy transfer in dye mixtures in monomer and polymer matrices under pulsed laser excitation

A comparative study of energy transfer in dye mixtures in monomer and polymer matrices under pulsed laser excitation

Storage ring two-color free-electron laser

Excitation wavelength dependence of energy transfer in dye mixture doped polymer optical fibre preforms

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