Convenient tunability of sub-10 fs-pulses in the visible range

Braun, Markus; Baigar, E.; Peine, A.; Konjaev, V.

doi:10.1364/up.2002.tue4

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The laser system for the TA measurements 39 consists of a home-built Ti:sapphire oscillator (100-MHz repetition rate, 20fs pulse duration, 10-nJ pulse energy) and a regenerative amplifier (1-kHz repetition rate, 80-fs pulse duration, 350-µJ pulse energy) at a central wavelength of 800 nm. The output of the laser is used as the pump source for two NOPAs (noncollinear optical parametric amplifier) that deliver pump and probe pulses for the TA measurements in the visible spectral range.…”

Section: Methodsmentioning

confidence: 99%

Electron−Hole Dynamics in CdTe Tetrapods

Malkmus¹,

Kudera²,

Manna³

et al. 2006

J. Phys. Chem. B

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We present transient absorption studies with femtosecond time resolution on the electron-hole dynamics in CdTe tetrapod nanostructures. Electron-hole pairs are generated by optical excitation in the visible spectral range, and an immediate bleach and induced absorption signal are observed. The relaxation dynamics to the lowest excitonic state is completed in about 6 ps. Experiments with polarized excitation pulses give information about the localization of the excited-state wave functions. The influence of the nanocrystal shape on the optical properties of CdTe nanoparticles is discussed.

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Section: Methodsmentioning

confidence: 99%

Electron−Hole Dynamics in CdTe Tetrapods

Malkmus¹,

Kudera²,

Manna³

et al. 2006

J. Phys. Chem. B

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show abstract

“…The laser system for the transient absorption measurements , consists of a home-built Ti:Sapphire oscillator (100 MHz repetition rate, 20 fs pulse duration, 10 nJ pulse energy) and a regenerative amplifier (1 kHz repetition rate, 80 fs pulse duration, 350 μJ pulse energy) at a central wavelength of 800 nm. The output of the laser is used as a pump source for two single-stage NOPA that deliver pump and probe pulses for the transient absorption measurements in the visible spectral range.…”

Section: Methodsmentioning

confidence: 99%

Chirp Dependence of Wave Packet Motion in Oxazine 1

et al. 2005

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The motion of vibrational wave packets in the system oxazine 1 in methanol is investigated by spectrally resolved transient absorption spectroscopy. The spectral properties of the probe pulse from 600 to 700 nm were chosen to cover the overlap region where ground-state bleach and stimulated emission signals are detected. The spectral phase of the pump pulse was manipulated by a liquid crystal display based pulse-shaping setup. Chirped excitation pulses of negative and positive chirp can be used to excite vibrational modes predominately in the ground or excited state, respectively. To distinguish the observed wave packets in oxazine 1 moving in the ground or excited state, spectrally resolved transient absorption experiments are performed for various values of the linear chirp of the pump pulses. The amplitudes of the wave packet motion show an asymmetric behavior with an optimum signal for a negative chirp of -0.75 ( 0.2 fs/nm, which indicates that predominantly ground-state wave packets are observed.

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“…The laser system for the transient absorption measurements 12 consists of a home-built Ti:Sapphire oscillator (100-MHz repetition rate, 20-fs pulse duration, 10-nJ pulse energy) and a regenerative amplifier (1-kHz repetition rate, 80-fs pulse duration, 350-µJ pulse energy) at a central wavelength of 800 nm (see Scheme 1). The output of the laser is used to pump two NOPAs (noncollinear optical parametric amplifier) [7][8][9] that deliver pump and probe pulses for the transient absorption measurements.…”

Section: Methodsmentioning

confidence: 99%

Analysis of Wave Packet Motion in Frequency and Time Domain: Oxazine 1

et al. 2006

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Wave packet motion in the laser dye oxazine 1 in methanol is investigated by spectrally resolved transient absorption spectroscopy. The spectral range of 600-690 nm was accessible by amplified broadband probe pulses covering the overlap region of ground-state bleach and stimulated emission signal. The influence of vibrational wave packets on the optical signal is analyzed in the frequency domain and the time domain. For the analysis in the frequency domain an algorithm is presented that accounts for interference effects of neighbored vibrational modes. By this method amplitude, phase and decay time of vibrational modes are retrieved as a function of probe wavelength and distortions due to neighbored modes are reduced. The analysis of the data in the time domain yields complementary information on the intensity, central wavelength, and spectral width of the optical bleach spectrum due to wave packet motion.

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Convenient tunability of sub-10 fs-pulses in the visible range

Abstract: We present a system for tunable laser pulses with a duration of about 7 fs. The pulses are generated by compression of the output of a tunable non-collinear optical parametric amplifier (NOPA) via a fiber compressor.

Cited by 3 publications

References 5 publications

Electron−Hole Dynamics in CdTe Tetrapods

Electron−Hole Dynamics in CdTe Tetrapods

Chirp Dependence of Wave Packet Motion in Oxazine 1

Analysis of Wave Packet Motion in Frequency and Time Domain: Oxazine 1

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