Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • The Thirteenth International Conference on Ultrafast Phenomena
  • 2002 OSA Technical Digest Series (Optica Publishing Group, 2002),
  • paper WD14
  • https://doi.org/10.1364/UP.2002.WD14

Femtosecond pump-probe spectroscopy using a two-dimensional smart pixel detector array

Not Accessible

Your library or personal account may give you access


Femtosecond pump-probe spectroscopy is a well-known method used to investigate ultrafast excited state dynamics in condensed matter, chemical, and biological systems. The standard technique uses a narrowband pump and continuum probe to excite the sample, and employs a spectrometer to acquire the wavelength dependent absorption saturation dynamics. This technique often requires the use of a femtosecond amplifier to achieve sufficient intensities for continuum generation and sufficient pump-probe signal magnitudes. With the development of 5 fs lasers, which can generate spectra spanning one octave, spectrally resolved pump-probe measurements can be performed without the need for amplifiers [1,2,3]. Although the pulse repetition rate from a laser oscillator is extremely high, pulse energies are low and signal levels are small. Standard CCD detectors cannot detect modulated signals and thus it is not possible to take advantage of high signal to noise measurements that are possible with high repetition rate laser sources. Here, we present a new technique that enables the parallel acquisition of pump-probe measurements for multiple wavelengths. This is made possible using a novel, two-dimensional smart pixel detector array, which was originally developed for high speed optical coherence tomography (OCT) [4,5]. Each pixel performs amplitude demodulation, and in combination with a diffraction grating, probe transmission signals can be acquired in parallel for multiple wavelengths. The smart pixel array can achieve sensitivities comparable to lock-in amplification but can perform demodulation of probe transmission signals at multiple wavelengths simultaneously, enabling time and wavelength resolved femtosecond pump-probe spectroscopy.

© 2002 Optical Society of America

PDF Article
More Like This
Probing Biexcitons in Quantum Dots using Femtosecond Pump/Probe and Two Dimensional Electronic Spectroscopy

Pooja Tyagi, Katherine Stone, Daniel Turner, Samuel Sewall, Keith Nelson, and Patanjali Kambhampati
MC3 International Conference on Ultrafast Phenomena (UP) 2010

Investigation of low-frequency, condensed phase solvation dynamics using a novel two-dimensional, resonant-pump, third-order Raman-probe technique

David F. Underwood and David A. Blank
MD4 International Conference on Ultrafast Phenomena (UP) 2002

Development of a CMOS active-pixel phase-sensitive detector imaging array

R. Swartzendruber, S. Sedarsky, N. Middleton, and M. Linne
SaA3 Laser Applications to Chemical and Environmental Analysis (LACEA) 2002


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription

Select as filters

Select Topics Cancel
© Copyright 2023 | Optica Publishing Group. All Rights Reserved