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Dual-trap technique...
Dual-trap technique for reduction of low-frequency noise in force measuring optical tweezers
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- Klein, Markus (författare)
- Umeå universitet,Institutionen för fysik
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- Andersson, Magnus (författare)
- Umeå universitet,Institutionen för fysik
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- Axner, Ove (författare)
- Umeå universitet,Institutionen för fysik
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- Fällman, Erik (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Applied Optics. - 1559-128X .- 2155-3165. ; 46:3, s. 405-412
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- High-resolution long-time force measurements by optical tweezers are often limited by low- frequency (1/f) noise. A dual-trap technique is presented that can reduce such noise in the force signal. It incorporates a second trap (a reference trap) that probes the noise in the system and it is based upon the assumption that the low-frequency parts of the noise from the two traps are correlated. A subtraction of the low-frequency signal from the reference trap from the signal from the force measuring trap will therefore yield a net signal that is significantly less influenced by noise. It is shown that this dual-trap technique can reduce the noise in the force signal up to 60% depending on detection bandwidth.
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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