Experimental and Theoretical Ruby Laser Amplifier Dynamics

Avizonis, Petras V.; Grotbeck, Ronald L.

doi:10.1063/1.1708238

Cited by 81 publications

(14 citation statements)

References 12 publications

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“…This equation is called the Avizonis-Grotbeck equation (Avizonis and Grotbeck, 1966). If g 0 = 0, equation [7.9] has an analytical solution that connects normalized fl uences at input u in and output u out of an amplifi er:…”

Section: Short Pulse Amplifi Ersmentioning

confidence: 99%

Principles of solid-state lasers

Il'ichev

2013

Handbook of Solid-State Lasers

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Section: Short Pulse Amplifi Ersmentioning

confidence: 99%

Principles of solid-state lasers

Il'ichev

2013

Handbook of Solid-State Lasers

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“…Figure 5. 43 illustrates the reduction of intensity noise one can achieve with a carefully designed feedback control loop. Shown is the photo current noise power, as measured by a spectrum analyzer with a 10-kHz bandwidth, of a diode-pumped Nd:YAG nonplanar ring laser in the free-running mode and with feedback control [5.53].…”

Section: Amplitude Fluctuationsmentioning

confidence: 99%

“…The shortest actively mode-locked pulses are generated with this type of mode locker which usually employs GaP or LiNbO 3 as Bragg material [9. 43,44]. Actually, the shortest pulses reported from an actively modelocked diode-pumped Nd:YLF laser, with 6.2 ps duration, has been achieved with a GaP acousto-optics mode locker [9.45].…”

Section: Am Mode Lockingmentioning

confidence: 99%

Solid-State Laser Engineering

2006

Springer Series in Optical Sciences

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Institute of Technology, USA, provides an expanding selection of research monographs in all major areas of optics: lasers and quantum optics, ultrafast phenomena, optical spectroscopy techniques, optoelectronics, quantum information, information optics, applied laser technology, industrial applications, and other topics of contemporary interest. With this broad coverage of topics, the series is of use to all research scientists and engineers who need up-to-date reference books.The editors encourage prospective authors to correspond with them in advance of submitting a manuscript.

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“…As an example, the energy-dependent changes in the refractive index and transmission coefficient of a Cr 4+ :YAG crystal under the ns-range (wavelength 1.06 µm) excitation are modeled. It is known [1] that propagation of a short pulse through a resonantly amplifying (or absorbing) medium with a "slow" relaxation of the excited state is addressed by the Avizonis-Grotbeck's equation:…”

mentioning

confidence: 99%

Nonlinear resonant change in refractive index of a doped saturable medium at short-pulse excitation

Kir’yanov

Il'ichev

2005

Laser Phys. Lett.

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A novel method is reported for calculating the nonlinear resonant change in refractive index of a doped saturable medium at the short-pulse excitation. The derived system of equations for energy density and phase of a short pulse propagating in the doped medium allows one to address a rather general case of the resonant index non-linearity caused by the dope's population perturbation (bleaching) effect. As an example, the energy-dependent changes in the refractive index and transmission coefficient of a Cr 4+ :YAG crystal under the ns-range (wavelength 1.06 µm) excitation are modeled. It is known [1] that propagation of a short pulse through a resonantly amplifying (or absorbing) medium with a "slow" relaxation of the excited state is addressed by the Avizonis-Grotbeck's equation:where ε = E p s σ GSA hυ is the ratio of incident pulse energy density E p /s (where E p and s are the pulse energy and laser beam geometrical cross-section) and saturating energy density hυ/σ GSA (where hυ is the energy quanta at the resonant wavelength and σ GSA is the ground-state absorption (GSA) of resonantly-absorbing dope centers embedded in the material), α 0 = σ GSA N 0 is the weak-signal resonant absorption coefficient (where N 0 is the concentration of dope centers), γ is the residual (non-saturable) loss coefficient, and z is the coordinate inside the sample. Eq. (1) holds if the coefficient γ relates (i) to all the "passive" losses (owing to scattering or presence of non-resonant impurities) and (ii) to the loss stemming from the excited-state absorption (ESA) [2] in the system of dope centers (if such a source of loss exists, see Fig. 1). Notice that "slow" relaxation of the excited state means that decay time τ rel of the latter is essentially longer than pulse-width τ p .Solving Eq. (1), one is able to calculate nonlinear (energy-dependent) transmission coefficient of the medium as the ratio of normalized input (ε in ) and output (ε out ) pulse energy densities: T (ε in ) = ε out /ε in . Meanwhile, to the best of our knowledge there is not known an analogous equation concerning the resonant nonlinear change ∆n res (ε in ) in refractive index n of the medium that should accompany the transmission coefficient nonlinearity. Despite there have been published a few re-

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Experimental and Theoretical Ruby Laser Amplifier Dynamics

Cited by 81 publications

References 12 publications

Principles of solid-state lasers

Principles of solid-state lasers

Solid-State Laser Engineering

Nonlinear resonant change in refractive index of a doped saturable medium at short-pulse excitation

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