OSA's Digital Library

Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 3 — Feb. 1, 2014
  • pp: 548–551

Energy-efficient low-Fresnel-number Bessel beams and their application in optical coherence tomography

Dirk Lorenser, C. Christian Singe, Andrea Curatolo, and David D. Sampson  »View Author Affiliations


Optics Letters, Vol. 39, Issue 3, pp. 548-551 (2014)
http://dx.doi.org/10.1364/OL.39.000548


View Full Text Article

Enhanced HTML    Acrobat PDF (753 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Bessel beams feature a very large depth-of-focus (DOF) compared to conventional focusing schemes, but their central lobe carries only a small fraction of the total beam power, leading to a strongly reduced peak irradiance. This is problematic for power-limited applications, such as optical coherence tomography (OCT) or optical coherence microscopy, as it can result in a prohibitive reduction of the signal-to-noise ratio (SNR). Using scalar diffraction theory, we show that the trade-off between DOF and peak irradiance of Bessel beams depends solely on the Fresnel number N. We demonstrate the existence of a low-Fresnel-number regime, N<10, in which axicons with Gaussian illumination can generate energy-efficient Bessel beams with a small number of sidelobes. In the context of OCT, this translates into DOF enhancements of up to 13× for a SNR penalty below 20 dB, which is confirmed by our experiments. We expect that these findings will enable improved performance of optical systems with extended DOF.

© 2014 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(140.3300) Lasers and laser optics : Laser beam shaping
(170.0180) Medical optics and biotechnology : Microscopy
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Imaging Systems

History
Original Manuscript: November 4, 2013
Manuscript Accepted: December 1, 2013
Published: January 23, 2014

Virtual Issues
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Dirk Lorenser, C. Christian Singe, Andrea Curatolo, and David D. Sampson, "Energy-efficient low-Fresnel-number Bessel beams and their application in optical coherence tomography," Opt. Lett. 39, 548-551 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-3-548


Sort:  Author  |  Year  |  Journal  |  Reset  

References

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1. Fig. 2. Fig. 3.
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited