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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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 |
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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 |
_version_ |
1759853439393726464 |