skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optimizing the time resolution of supercontinuum spectral interferometry

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1257656
Grant/Contract Number:
DESC0007970
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of the Optical Society of America B
Additional Journal Information:
Journal Volume: 33; Journal Issue: 7; Related Information: CHORUS Timestamp: 2016-06-17 10:17:46; Journal ID: ISSN 0740-3224
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English

Citation Formats

Wahlstrand, J. K., Zahedpour, S., and Milchberg, H. M. Optimizing the time resolution of supercontinuum spectral interferometry. United States: N. p., 2016. Web. doi:10.1364/JOSAB.33.001476.
Wahlstrand, J. K., Zahedpour, S., & Milchberg, H. M. Optimizing the time resolution of supercontinuum spectral interferometry. United States. doi:10.1364/JOSAB.33.001476.
Wahlstrand, J. K., Zahedpour, S., and Milchberg, H. M. 2016. "Optimizing the time resolution of supercontinuum spectral interferometry". United States. doi:10.1364/JOSAB.33.001476.
@article{osti_1257656,
title = {Optimizing the time resolution of supercontinuum spectral interferometry},
author = {Wahlstrand, J. K. and Zahedpour, S. and Milchberg, H. M.},
abstractNote = {},
doi = {10.1364/JOSAB.33.001476},
journal = {Journal of the Optical Society of America B},
number = 7,
volume = 33,
place = {United States},
year = 2016,
month = 6
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1364/JOSAB.33.001476

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • Ultrafast optical diagnostics play a vital role in probing the dynamics in laser-matter interactions, including those observed in the high intensity ultrashort laser pulse regime. We developed a new femtosecond optical diagnostic, single-shot supercontinuum spectral interferometry (SSSI), which measures ultra-rapid transients in the complex index of refraction induced by an intense laser pulse. This measurement provides a direct view on how the laser-produced perturbations evolve in time and space. To date, SSSI has been successfully used to diagnose femtosecond dynamics in the interaction of intense laser pulses with gases, nanometer-sized atomic or molecular clusters, and plasmas, including plasma waveguides.
  • We describe a two-color pump-probe scanning magneto-optical Kerr effect microscope which we have developed to investigate electron spin phenomena in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution. The key innovation of our microscope is the usage of an ultrafast “white light” supercontinuum fiber-laser source which provides access to the whole visible and near-infrared spectral range. Our Kerr microscope allows for the independent selection of the excitation and detection energy while avoiding the necessity to synchronize the pulse trains of two separate picosecond laser systems. The ability to independently tune the pump and probe wavelength enables themore » investigation of the influence of excitation energy on the optically induced electron spin dynamics in semiconductors. We demonstrate picosecond real-space imaging of the diffusive expansion of optically excited electron spin packets in a (110) GaAs quantum well sample to illustrate the capabilities of the instrument.« less
  • We present a new scheme for coherent measurement of ultrashort optical pulses that relies on spectral shearing interferometry combined with all-optical time gating. The spectral phase is encoded along a temporal coordinate resulting in a two-dimensional (2D) self-referenced and self-calibrating set of data. The method works without time delay between the two interfering signals. The pulse amplitude and phase are reconstructed with a high signal-to-noise ratio using a direct algorithm that applies a Fourier transform (FT) to the 2D recorded interference pattern. Characterization of low-energy, high-repetition-rate femtosecond pulses of various shapes and validation of a single-shot operation are reported.
  • The pulse shape and the generated supercontinuum spectral distribution associated with the propagation of an ultrashort intense pulse in a cubic (Chi,LC/sup (3)/) nonlinear meadium are obtained by solving the electromagnetic field wave equation using the method of multiple scales. New forms for the set of quasi-linear partial differential equations describing the system, pulse distortion, and the spectral extent of the supercontinuum are the focus of this paper.
  • The spatio-temporal spectrum of optical radiation reflected from a nonlinear dielectric medium with nonresonant dispersion is obtained as a function of the parameters of the spatio-temporal spectrum of a paraxial light beam incident on the boundary of the medium at small angles. Nonlinear reflection of various types of femtosecond spectral supercontinua from the interface between air and fused silica is simulated. It is shown that the time duration and the transverse dimensions of a beam of multiple-frequency radiation generated during the reflection of a superposition of high-intensity fields of two few-cycle pulses with different central wavelengths may be smaller thanmore » those of incident ultrashort pulses.« less