In situ third-order interferometric autocorrelation of a femtosecond deep-ultraviolet pulse

Miyoshi, Y.; Zaitsu, Shin-ichi; Imasaka, Totaro

doi:10.1007/s00340-010-4324-z

Appl. Phys. B

2010

DOI: 10.1007/s00340-010-4324-z

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In situ third-order interferometric autocorrelation of a femtosecond deep-ultraviolet pulse

Y. Miyoshi

Shin-ichi Zaitsu

Totaro Imasaka

Abstract: In-situ third-order interferometric autocorrelation of a femtosecond deep-ultraviolet pulse

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Cited by 10 publications

(1 citation statement)

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“…For TH 1 signals [ Fig. 3(a)], assuming Gaussian pulse shape, the fitting yields an ∼36 fs incident pulse width that matches the FP duration [20]. In practice, THG at the glass-air interface is an efficient method to diagnose fs pulses [8,9] independent of laser wavelength and requiring much less stringent phase matching as compared to second-order nonlinear pulse characterization methods [5].…”

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confidence: 98%

Distinct broadband third-harmonic generation on a thin amorphous medium–air interface

et al. 2013

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We achieve a series of distinct broadband third-harmonic generation (THG) signals at the amorphous glass-air interface attributed to third-order and cascaded third-order nonlinear processes. A novel THG laser sideband arises from cascaded interaction between fundamental pulses and the cascaded four-wave mixing signals. The spatially separated THG sidebands with distinct spectral profiles manifest femtosecond quantum beats. Using a versatile setup with two crossing near-IR pulses temporally delayed to each other, we design an incident pulse polarization control method on the THG sideband lasers and also acquire the low-frequency surface Raman spectrum of the amorphous medium.

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Distinct broadband third-harmonic generation on a thin amorphous medium–air interface

et al. 2013

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Gas chromatography/multiphoton ionization/time-of-flight mass spectrometry using a femtosecond laser

Imasaka

2013

Anal Bioanal Chem

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A laser can be used for the selective excitation and subsequent ionization of a molecule with an absorption band at the laser wavelength. This technique of multiphoton ionization (MPI), when combined with time-of-flight mass spectrometry (TOF-MS), permits the efficient detection of induced ions in mass analysis. This combination of MPI/TOF-MS can be coupled with gas chromatography (GC) to achieve even more enhanced selectivity. Thus, GC/MPI/TOF-MS can be employed for trace analysis of samples containing numerous chemical species. A variety of laser sources have been used for this purpose. Since molecules that are classified as environmental pollutants frequently contain chlorine and bromine atoms, the lifetime of the excited state can be decreased by energy transfer from the singlet to triplet levels by spin-orbit interaction. A high-power femtosecond laser with a pulse width shorter than the lifetime of the analyte molecule provides femtogram or even subfemtogram detection limits, which have not yet been achieved using the most sensitive high-resolution double-focus sector-type mass spectrometers. Numerous environmental pollutants such as dioxins in soils and pesticides in foods have been successfully quantified using GC/MPI/TOF-MS, and this technique has proven itself to be a useful and practical method for trace analysis.

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The search for a molecule to measure an autocorrelation trace of the second/third harmonic emission of a Ti:sapphire laser based on two-photon resonant excitation and subsequent one-photon ionization

Imasaka

Okuno

2013

Appl. Phys. B

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In situ third-order interferometric autocorrelation of a femtosecond deep-ultraviolet pulse

Abstract: In-situ third-order interferometric autocorrelation of a femtosecond deep-ultraviolet pulse

Cited by 10 publications

References 25 publications

Distinct broadband third-harmonic generation on a thin amorphous medium–air interface

Distinct broadband third-harmonic generation on a thin amorphous medium–air interface

Gas chromatography/multiphoton ionization/time-of-flight mass spectrometry using a femtosecond laser

The search for a molecule to measure an autocorrelation trace of the second/third harmonic emission of a Ti:sapphire laser based on two-photon resonant excitation and subsequent one-photon ionization

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