Amplification of femtosecond pulses at 10-kHz repetition rates in Ti:Al_2O_3

Squier, Jeff; Korn, G.; Mourou, G.; Vaillancourt, Gary; Bouvier, M.

doi:10.1364/ol.18.000625

Cited by 38 publications

(9 citation statements)

References 9 publications

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“…Transient-absorption experiments reported employed a laser system based on the design of Squier et al., , and details have been described elsewhere . In brief, laser pulses (130-fs duration centered near 790 nm with a pulse energy of ≈200 μJ) at a 2-kHz repetition rate were generated by a Ti:sapphire-based oscillator and regenerative amplifier.…”

Section: Experimental Methodsmentioning

confidence: 99%

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺

et al. 1997

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[Ru(phen)2dppz]2+ (phen = 1,10-phenanthroline, dppz = dipyridophenazine) and closely related complexes have previously been observed to have an undetectably small quantum yield of photoluminescence in water but a moderate emission yield when bound to DNA. This so-called “light-switch” effect is a critical factor in the utility of these complexes as spectroscopic probes for DNA. Here we describe a detailed investigation of the photophysics of [Ru(phen)2dppz]2+ in aqueous solution, and in mixtures of acetonitrile and water, by time-resolved absorption and emission spectroscopies. The emission of the complex in water has been measured for the first time. A prompt initial emission, derived from a metal-to-ligand charge-transfer (MLCT) excited state typical for polypyridyl−ruthenium complexes, is observed along with a delayed emission attributed to a novel MLCT species. The small quantum yield of photoluminescence for [Ru(phen)2dppz]2+ in water, and in water/acetonitrile, depends upon efficient formation of a novel MLCT species, followed by its rapid radiationless decay. The MLCT interconversion is assigned to an intramolecular charge-transfer process that is induced by the polarity and proton donating ability of the solvent.

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Section: Experimental Methodsmentioning

confidence: 99%

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺

et al. 1997

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“…1͑a͔͒ that minimizes both GVD as well as third-order dispersion ͑TOD͒. The regenerative amplifier cavity is largely based on the design described by Squier et al 43 and consists of a 2.54 cm Ti:sapphire crystal surrounded by a dichroic mirror with a radius of curvature of 15 cm ͓M1, see Fig. 1͑a͔͒ and a fold mirror with a radius of curvature of 50 cm ͑M2͒.…”

Section: A the Laser Methodsmentioning

confidence: 99%

Vibrational coherence in electron transfer: The tetracyanoethylene–pyrene complex

Wynne

Reid

Hochstrasser

1996

The Journal of Chemical Physics

134

132

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Articles you may be interested in TTF-TCNE a charge transfer π-molecular crystal with partial ionic ground state: Optical properties and electron molecular vibrations interaction Coherent vibrational wave packet motion is created in the excited charge-transfer state of the electron donor-acceptor complex between tetracyanoethylene ͑TCNE͒ and pyrene by an ultrashort ͑40 fs͒ 810 nm pump pulse. Observations of the dynamics of the TCNE-anion transient absorption and the disappearance of the bleach of the ground state absorption show that the electron-transfer reaction back to the ground state of the complex occurs on a 250 fs-1.5 ps time scale. The bleach recovery signal shows clear oscillations and both impulsive stimulated Raman scattering in the ground state and coherent repopulation of the ground state surface due to a vibrationally coherent electron transfer reaction were considered as the cause. Vibrational coherence has also been monitored by observing quantum beats in the stimulated emission from the charge transfer state back to the ground state in the near-ir. This observation strongly suggests that the electron transfer reaction is indeed vibrationally coherent and that the reaction rate is modulated by this coherence. This interpretation is corroborated by a classical Monte Carlo simulation of vibrationally coherent reactions in the inverted regime.

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“…A few papers report fractional millijoule CPA systems running at ~10 kHz repetitions rates [15,16]. However, use of these systems has been limited, despite the fact that highpower frequency-doubled Nd:YAG lasers operating at 20-50 kHz and with average powers of ~100W are readily available.…”

Section: Introductionmentioning

confidence: 99%

Multi-kilohertz repetition rate Ti:sapphire amplifier based on down-chirped pulse amplification

Gaudiosi¹,

Gagnon²,

Lytle³

et al. 2006

Opt. Express

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We present a novel ultrafast multipass laser amplifier design optimized for sub-millijoule output energy and capable of being operated at repetition rates exceeding 40 kHz. This ti:sapphire based system makes use of a grism based stretcher, a cryogenically cooled ti:sapphire crystal and an astigmatically compensated multipass amplifier design that allows for pumping with significantly lower pump pulse energies than has been demonstrated to date. We also make use of the downchirped pulse amplification scheme to minimize loss in the pulse compression process. Preliminary experiments demonstrate an output pulse energy of 290 muJ at 10 kHz and 270 muJ at 15 kHz with a pulse duration of 36 fs.

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Amplification of femtosecond pulses at 10-kHz repetition rates in Ti:Al_2O_3

Cited by 38 publications

References 9 publications

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺

Vibrational coherence in electron transfer: The tetracyanoethylene–pyrene complex

Multi-kilohertz repetition rate Ti:sapphire amplifier based on down-chirped pulse amplification

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Amplification of femtosecond pulses at 10-kHz repetition rates in Ti:Al_2O_3

Cited by 38 publications

References 9 publications

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)2dppz]2+

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)2dppz]2+

Vibrational coherence in electron transfer: The tetracyanoethylene–pyrene complex

Multi-kilohertz repetition rate Ti:sapphire amplifier based on down-chirped pulse amplification

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Product

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First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺

First Observation of the Key Intermediate in the “Light-Switch” Mechanism of [Ru(phen)₂dppz]²⁺