Linked Life Data

17477643

Source:http://linkedlifedata.com/resource/pubmed/id/17477643

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2007-5-4
pubmed:abstractText
We report on a scheme to improve the pointing stability of the first order beam diffracted by an acousto-optic modulator (AOM). Due to thermal effects inside the crystal, the angular position of the beam can change by as much as 1 mrad when the radio-frequency power in the AOM is reduced to decrease the first order beam intensity. This is done, for example, to perform forced evaporative cooling in ultracold atom experiments using far-off-resonant optical traps. We solve this problem by driving the AOM with two radio frequencies f(1) and f(2). The power of f(2) is adjusted relative to the power of f(1) to keep the total power constant. Using this, the beam displacement is decreased by a factor of 20. The method is simple to implement in existing experimental setups, without any modification of the optics.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Apr
pubmed:issn
0034-6748
pubmed:author
pubmed:issnType
Print
pubmed:volume
78
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
043101
pubmed:year
2007
pubmed:articleTitle
Two-frequency acousto-optic modulator driver to improve the beam pointing stability during intensity ramps.
pubmed:affiliation
5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, Stuttgart, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't