Title
Ultrabroadband Coherence-Domain Imaging Using Parametric Downconversion And Superconducting Single-Photon Detectors At 1064 Nm
Abstract
Coherence-domain imaging systems can be operated in a single-photon- counting mode, offering low detector noise; this in turn leads to increased sensitivity for weak light sources and weakly reflecting samples. We have demonstrated that excellent axial resolution can be obtained in a photon-counting coherence-domain imaging (CDI) system that uses light generated via spontaneous parametric downconversion (SPDC) in a chirped periodically poled stoichiometric lithium tantalate (chirped-PPSLT) structure, in conjunction with a niobium nitride superconducting single-photon detector (SSPD). The bandwidth of the light generated via SPDC, as well as the bandwidth over which the SSPD is sensitive, can extend over a wavelength region that stretches from 700to 1500 nm. This ultrabroad wavelength band offers a near-ideal combination of deep penetration and ultrahigh axial resolution for the imaging of biological tissue. The generation of SPDC light of adjustable bandwidth in the vicinity of 1064 nm, via the use of chirped-PPSLT structures, had not been previously achieved. To demonstrate the usefulness of this technique, we construct images for a hierarchy of samples of increasing complexity: a mirror, a nitrocellulose membrane, and a biological sample comprising onion-skin cells. © 2009 Optical Society of America.
Publication Date
7-10-2009
Publication Title
Applied Optics
Volume
48
Issue
20
Number of Pages
4009-4017
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1364/AO.48.004009
Copyright Status
Unknown
Socpus ID
67749103743 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/67749103743
STARS Citation
Mohan, Nishant; Minaeva, Olga; Goltsman, Gregory N.; Saleh, Mohammed F.; and Nasr, Magued B., "Ultrabroadband Coherence-Domain Imaging Using Parametric Downconversion And Superconducting Single-Photon Detectors At 1064 Nm" (2009). Scopus Export 2000s. 11754.
https://stars.library.ucf.edu/scopus2000/11754