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UBC Theses and Dissertations
A rapid-scan optical interferometric cross-correlator for time-resolved laser spectroscopy Zhu, Rong
Abstract
The rapid progress of short pulse laser technology has provided a concomitant increase in the use of ultrashort lasers for the characterization of the optical and electronic properties of semiconductor nanostructures and devices. As the characteristic timescale of the phenomenon under investigation approaches the optical pulse width that is used, it becomes increasely important to be able to fully characterize the amplitude and phase of the pulses before and after interacting with a sample in any given experiment. Towards this end, we designed and developed a computerized optical interferometric cross-correlator for femtosecond time-resolved laser spectroscopy, which can be used to extract amplitude and phase information from pulses used to probe a variety of systems. This electro-optical system, which we refer to as the rapid scan interferometric cross correlation system (RICCS), consists of a femtosecond Ti: sapphire laser source, a custom Mach- Zehnder interferometer for cross correlations, a continuous wave (cw) HeNe laser and a Michelson interferometer for relative path delay decoding, linear optoelectronic detection, electronic processing, computerized device control, and signal acquisition and data analysis. A novel aspect of this system is the use of a mirror mounted on an audio speaker as a rapid scanner to provide the relative path delay between the reference beam and signal beam in the Mach-Zehnder interferometer. Interferograms with up to 500 fringes each scan can be acquired by the computer at rates up to 25 scans per second. This thesis describes the principles of the operation of this RICCS system, its implementation, and its use in both auto-correlation and cross correlation modes.
Item Metadata
Title |
A rapid-scan optical interferometric cross-correlator for time-resolved laser spectroscopy
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1995
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Description |
The rapid progress of short pulse laser technology has provided a concomitant increase in
the use of ultrashort lasers for the characterization of the optical and electronic properties of
semiconductor nanostructures and devices. As the characteristic timescale of the phenomenon under
investigation approaches the optical pulse width that is used, it becomes increasely important to be
able to fully characterize the amplitude and phase of the pulses before and after interacting with a
sample in any given experiment. Towards this end, we designed and developed a computerized
optical interferometric cross-correlator for femtosecond time-resolved laser spectroscopy, which can
be used to extract amplitude and phase information from pulses used to probe a variety of systems.
This electro-optical system, which we refer to as the rapid scan interferometric cross
correlation system (RICCS), consists of a femtosecond Ti: sapphire laser source, a custom Mach-
Zehnder interferometer for cross correlations, a continuous wave (cw) HeNe laser and a Michelson
interferometer for relative path delay decoding, linear optoelectronic detection, electronic
processing, computerized device control, and signal acquisition and data analysis. A novel aspect
of this system is the use of a mirror mounted on an audio speaker as a rapid scanner to provide the
relative path delay between the reference beam and signal beam in the Mach-Zehnder interferometer.
Interferograms with up to 500 fringes each scan can be acquired by the computer at rates up to 25
scans per second.
This thesis describes the principles of the operation of this RICCS system, its
implementation, and its use in both auto-correlation and cross correlation modes.
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Extent |
4520095 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-01-17
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0074511
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1995-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.