Photosensitive Liquid used as a Nondestructive Passive Q-Switch in a Ruby Laser

Kafalas, P.; Masters, Joseph I.; Murray, Éamonn

doi:10.1063/1.1702862

Cited by 107 publications

(7 citation statements)

References 2 publications

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“…In a Q-switched laser, the cavity Q is controlled so that oscillations are prevented until a high population inversion is established in the laser medium. The laser output then consists of a single narrow pulse whose peak power far exceeds that of the spikes normally emitted [3,4].…”

Section: Introductionmentioning

confidence: 99%

Proposed method of spike suppression in solid-state lasers

Bhawalkar

Nair

1972

Opto-electronics

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A method is proposed to suppress the spikes in the output of solid-state lasers, using passive negative feedback. A saturable absorber, normally used for Q-switching the laser, is used in a modified laser resonator, so that the resonator losses increase with laser intensity. The rate equations of a laser with such a loss mechanism are solved numerically. Numerical results for a ruby laser are presented.

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Section: Introductionmentioning

confidence: 99%

Proposed method of spike suppression in solid-state lasers

Bhawalkar

Nair

1972

Opto-electronics

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“…There has been much interest in the passive Q-switching of lasers by the saturable absorption of solutions of organic dyes [1][2][3][4]. Rate equation analyses of the laser pulse evolution and the bleaching of the dye [5,6] have been made and compared with experiment.…”

Section: Introductionmentioning

confidence: 99%

Laser Q-switching by organic solvents

1969

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The role of the solvent in the passive Q-switching of lasers by solutions of organic dyes has been examined in detail. It was found that several pure organic solvents could themselves partially Q-switch the laser, in the absence of the dye. This behaviour was observed for both ruby and neodymium : glass lasers. Pulse-widths as short as 20 nsec were occasionally recorded. Peak powers up to 2 MW have been observed using 1-chloronaphthalene to switch a ruby laser. It is proposed that Q-switching arises from an enhancement of reflectivity of the liquid, during the evolution of the laser pulse, through the formation of a periodic refractive index modulation in the liquid by the action of standing waves.

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“…Since the first passive Q-switching of ruby lasers with organic dye solutions [74][75][76] various solid-state lasers (ruby, alexandrite, Nd:YAG, Nd: glass; pulse durations typical 10-20 ns) and C0 2 lasers (pulse duration between 400 ns and 2 us) have been Q-switched with different saturable absorbers. References to the various Q-switched lasers are given in Table 1.…”

Section: Passive Q-switching 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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Photosensitive Liquid used as a Nondestructive Passive Q-Switch in a Ruby Laser

Cited by 107 publications

References 2 publications

Proposed method of spike suppression in solid-state lasers

Proposed method of spike suppression in solid-state lasers

Laser Q-switching by organic solvents

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

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