Improved interferometric tracking of trapped particles using two frequency-detuned beams
Optics Letters, Vol. 35, Issue 11, pp. 1920-1922 (2010)
http://dx.doi.org/10.1364/OL.35.001920
Enhanced HTML 
Acrobat PDF (440 KB)
Abstract
For most optical tweezer applications, precise and reliable tracking of the trapped particle is an important requirement. Backfocal-plane interferometry is the fastest and most accurate tracking technique if the particle displacements are limited to half of the focal width. Especially for positive axial displacements, the nonlinear detector response can lead to incorrect tracking results. Here we show how the linear detection range around the trap center can be extended by a factor of 2 to 4 in the axial direction using a second frequency-detuned tracking focus that is generated by the same laser as the optical trap. Additionally, we show how the noise in the axial signal can be decreased significantly using a second detector.
© 2010 Optical Society of America
OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.7010) Lasers and laser optics : Laser trapping
(260.3160) Physical optics : Interference
(290.0290) Scattering : Scattering
ToC Category:
Scattering
History
Original Manuscript: February 25, 2010
Manuscript Accepted: April 26, 2010
Published: May 28, 2010
Virtual Issues
Vol. 5, Iss. 10 Virtual Journal for Biomedical Optics
Citation
Lars Friedrich and Alexander Rohrbach, "Improved interferometric tracking of trapped particles using two frequency-detuned beams," Opt. Lett. 35, 1920-1922 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-35-11-1920
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Light scattering from slightly rough dielectric films (JOSAA)
- Measurement precision in surface Brillouin scattering (JOSAB)
- Interferometric 3D tracking of several particles in a scanning laser focus (OE)
- Fast parallel interferometric 3D tracking of numerous optically trapped particles and their hydrodynamic interaction (OE)
- Tuning the detection sensitivity: a model for axial backfocal plane interferometric tracking (OL)
Related Conference Papers
- Trace-species measurements from phase shift of transient-grating signals
- Experimental synthesis of uniform fiber Bragg gratings
- Optical Rotation Detection in a Chiral Scattering Medium with an Amplitude Sensitive Balanced Detection Polarimeter
- IR Optical Scattering Instrument with Out-of-Plane and Retro-Reflection Capabilities
- Optical Rotation Detection in a Chiral Scattering Medium with an Amplitude Sensitive Balanced Detection Polarimeter
« Previous Article | Next Article »
OSA is a member of 