Flexible lock-in detection system based on synchronized computer plug-in boards applied in sensitive gas spectroscopy
(2007) In Review of Scientific Instruments 78(11).- Abstract
- We present a flexible and compact, digital, lock-in detection system and its use in high-resolution
tunable diode laser spectroscopy. The system involves coherent sampling, and is based on the
synchronization of two data acquisition cards running on a single standard computer. A
software-controlled arbitrary waveform generator is used for laser modulation, and a four-channel
analog/digital board records detector signals. Gas spectroscopy is performed in the wavelength
modulation regime. The coherently detected signal is averaged a selected number of times before it
is stored or analyzed by software-based, lock-in techniques. Multiple harmonics of the modulation
signal 1f, 2f,... (More) - We present a flexible and compact, digital, lock-in detection system and its use in high-resolution
tunable diode laser spectroscopy. The system involves coherent sampling, and is based on the
synchronization of two data acquisition cards running on a single standard computer. A
software-controlled arbitrary waveform generator is used for laser modulation, and a four-channel
analog/digital board records detector signals. Gas spectroscopy is performed in the wavelength
modulation regime. The coherently detected signal is averaged a selected number of times before it
is stored or analyzed by software-based, lock-in techniques. Multiple harmonics of the modulation
signal 1f, 2f, 3f, 4f, etc. are available in each single data set. The sensitivity is of the order of 10−5,
being limited by interference fringes in the measurement setup. The capabilities of the system are
demonstrated by measurements of molecular oxygen in ambient air, as well as dispersed gas in
scattering materials, such as plants and human tissue. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/795985
- author
- Andersson, Mats LU ; Persson, Linda LU ; Svensson, Tomas LU and Svanberg, Sune LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Review of Scientific Instruments
- volume
- 78
- issue
- 11
- article number
- 113107
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- pmid:18052465
- wos:000251325900010
- scopus:36749031241
- ISSN
- 1089-7623
- DOI
- 10.1063/1.2813346
- language
- English
- LU publication?
- yes
- id
- f7d2a3ee-ac09-4ab8-a934-4ce62f990966 (old id 795985)
- date added to LUP
- 2016-04-01 16:23:56
- date last changed
- 2022-01-28 19:23:17
@article{f7d2a3ee-ac09-4ab8-a934-4ce62f990966,
abstract = {{We present a flexible and compact, digital, lock-in detection system and its use in high-resolution<br/><br>
tunable diode laser spectroscopy. The system involves coherent sampling, and is based on the<br/><br>
synchronization of two data acquisition cards running on a single standard computer. A<br/><br>
software-controlled arbitrary waveform generator is used for laser modulation, and a four-channel<br/><br>
analog/digital board records detector signals. Gas spectroscopy is performed in the wavelength<br/><br>
modulation regime. The coherently detected signal is averaged a selected number of times before it<br/><br>
is stored or analyzed by software-based, lock-in techniques. Multiple harmonics of the modulation<br/><br>
signal 1f, 2f, 3f, 4f, etc. are available in each single data set. The sensitivity is of the order of 10−5,<br/><br>
being limited by interference fringes in the measurement setup. The capabilities of the system are<br/><br>
demonstrated by measurements of molecular oxygen in ambient air, as well as dispersed gas in<br/><br>
scattering materials, such as plants and human tissue.}},
author = {{Andersson, Mats and Persson, Linda and Svensson, Tomas and Svanberg, Sune}},
issn = {{1089-7623}},
language = {{eng}},
number = {{11}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Review of Scientific Instruments}},
title = {{Flexible lock-in detection system based on synchronized computer plug-in boards applied in sensitive gas spectroscopy}},
url = {{https://lup.lub.lu.se/search/files/4661142/2368871.pdf}},
doi = {{10.1063/1.2813346}},
volume = {{78}},
year = {{2007}},
}