Laser cooling system for caesium.

In this final year project, a laser system was built for cooling 133Cs. We build 2 external cavity diode lasers (ECDL) at 852nm, serving as the lasers for cooling and repumping of 133Cs. The power from one of the ECDL was ampli ed with a tapered ampli er(TA) in the master oscillator power...

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Main Author: Ley, Li Yuan.
Other Authors: Rainer Helmut Dumke
Format: Final Year Project
Language:English
Published: 2012
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Online Access:http://hdl.handle.net/10356/48689
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-486892023-02-28T23:11:36Z Laser cooling system for caesium. Ley, Li Yuan. Rainer Helmut Dumke School of Physical and Mathematical Sciences DRNTU::Science In this final year project, a laser system was built for cooling 133Cs. We build 2 external cavity diode lasers (ECDL) at 852nm, serving as the lasers for cooling and repumping of 133Cs. The power from one of the ECDL was ampli ed with a tapered ampli er(TA) in the master oscillator power ampli er (MOPA) con guration. Both lasers are frequency stabilized to within 1MHz by two di erent techniques: AC locking using saturated absorption spectroscopy, and trombone locking using beat signal. Then acousto-optic modulators (AOM) are used to o set and ne tune the frequency of the various lasers beam required for the cooling experiment. All electronics that required for stabilizing laser were hand build, this include current controller, temperature controller, AOM controller, COSY box driver, PI controller and Log-in ampli er. A compact con guration of Doppler free saturation spectroscopy(COSY box) use in AC locking was also designed and hand build by author. The 133Cs cooling system setup and laser stabilization will be discuss in this thesis. Bachelor of Science in Physics 2012-05-08T03:18:59Z 2012-05-08T03:18:59Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/48689 en 62 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science
spellingShingle DRNTU::Science
Ley, Li Yuan.
Laser cooling system for caesium.
description In this final year project, a laser system was built for cooling 133Cs. We build 2 external cavity diode lasers (ECDL) at 852nm, serving as the lasers for cooling and repumping of 133Cs. The power from one of the ECDL was ampli ed with a tapered ampli er(TA) in the master oscillator power ampli er (MOPA) con guration. Both lasers are frequency stabilized to within 1MHz by two di erent techniques: AC locking using saturated absorption spectroscopy, and trombone locking using beat signal. Then acousto-optic modulators (AOM) are used to o set and ne tune the frequency of the various lasers beam required for the cooling experiment. All electronics that required for stabilizing laser were hand build, this include current controller, temperature controller, AOM controller, COSY box driver, PI controller and Log-in ampli er. A compact con guration of Doppler free saturation spectroscopy(COSY box) use in AC locking was also designed and hand build by author. The 133Cs cooling system setup and laser stabilization will be discuss in this thesis.
author2 Rainer Helmut Dumke
author_facet Rainer Helmut Dumke
Ley, Li Yuan.
format Final Year Project
author Ley, Li Yuan.
author_sort Ley, Li Yuan.
title Laser cooling system for caesium.
title_short Laser cooling system for caesium.
title_full Laser cooling system for caesium.
title_fullStr Laser cooling system for caesium.
title_full_unstemmed Laser cooling system for caesium.
title_sort laser cooling system for caesium.
publishDate 2012
url http://hdl.handle.net/10356/48689
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