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Title: Short pulsewidth high repetition rate nanosecond transient absorption spectrometer

Abstract

A high-sensitivity nanosecond to millisecond transient absorption spectrometer for measurements of miniscule signals under low excitation intensities includes an excitation source generating a >100 Hz, <5 ns pulsewidth excitation pulse for exciting a light absorbing sample, a probe light source for generating a high photon flux probe light beam producing an average irradiance greater than 1 μW m-2 nm-1 for measuring the transient absorption spectrum of the sample before and after excitation by the excitation source, a DC-coupled detector capable of measuring light for enabling synchronous measurement of both the transmission of the probe light beam and the change in transmission of the probe light beam between a signal with the excitation pulse present and a signal in the absence of the excitation pulse, and a digital oscilloscope with a trigger rearm time capable of collecting every trigger event at frequencies including 1MHz, for enabling sequential noise subtraction protocols.

Inventors:
; ; ;
Issue Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1860140
Patent Number(s):
11193825
Application Number:
16/613,717
Assignee:
The Penn State Research Foundation (University Park, PA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
SC0008120
Resource Type:
Patent
Resource Relation:
Patent File Date: 05/24/2018
Country of Publication:
United States
Language:
English

Citation Formats

Rimshaw, Adam, Grieco, Christopher, Kennehan, Eric, and Asbury, John B. Short pulsewidth high repetition rate nanosecond transient absorption spectrometer. United States: N. p., 2021. Web.
Rimshaw, Adam, Grieco, Christopher, Kennehan, Eric, & Asbury, John B. Short pulsewidth high repetition rate nanosecond transient absorption spectrometer. United States.
Rimshaw, Adam, Grieco, Christopher, Kennehan, Eric, and Asbury, John B. Tue . "Short pulsewidth high repetition rate nanosecond transient absorption spectrometer". United States. https://www.osti.gov/servlets/purl/1860140.
@article{osti_1860140,
title = {Short pulsewidth high repetition rate nanosecond transient absorption spectrometer},
author = {Rimshaw, Adam and Grieco, Christopher and Kennehan, Eric and Asbury, John B.},
abstractNote = {A high-sensitivity nanosecond to millisecond transient absorption spectrometer for measurements of miniscule signals under low excitation intensities includes an excitation source generating a >100 Hz, <5 ns pulsewidth excitation pulse for exciting a light absorbing sample, a probe light source for generating a high photon flux probe light beam producing an average irradiance greater than 1 μW m-2 nm-1 for measuring the transient absorption spectrum of the sample before and after excitation by the excitation source, a DC-coupled detector capable of measuring light for enabling synchronous measurement of both the transmission of the probe light beam and the change in transmission of the probe light beam between a signal with the excitation pulse present and a signal in the absence of the excitation pulse, and a digital oscilloscope with a trigger rearm time capable of collecting every trigger event at frequencies including 1MHz, for enabling sequential noise subtraction protocols.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {12}
}

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