Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating

Stefan Remund, Anke Bossen, Xianfeng Chen, Ling Wang, Adedotun Adebayo, Lin Zhang, Boris Považay, Christoph Meier

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

A compact, fiber-based spectrometer for biomedical application utilizing a tilted fiber Bragg grating (TFBG) as integrated dispersive element is demonstrated. Based on a 45° UV-written PS750 TFBG a refractive spectrometer with 2.06 radiant/μm dispersion and a numerical aperture of 0.1 was set up and tested as integrated detector for an optical coherence tomography (OCT) system. Featuring a 23 mm long active region at the fiber the spectrum is projected via a cylindrical lens for vertical beam collimation and focused by an achromatic doublet onto the detector array. Covering 740 nm to 860 nm the spectrometer was optically connected to a broadband white light interferometer and a wide field scan head and electronically to an acquisition and control computer. Tomograms of ophthalmic and dermal samples obtained by the frequency domain OCT-system were obtained achieving 2.84 μm axial and 7.6 μm lateral resolution.

Original languageEnglish
Title of host publicationOptical fibers and sensors for medical diagnostics and treatment applications XIV
EditorsIsrael Gannot
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages8
ISBN (Print)978-0-8194-9851-9
DOIs
Publication statusPublished - 20 Feb 2014
EventOptical fibers and sensors for medical diagnostics and treatment applications XIV - San Francisco, CA, United States
Duration: 1 Feb 20142 Feb 2014

Publication series

NameSPIE proceedings
PublisherSPIE
Volume8938
ISSN (Print)0277-786X
NameProgress in biomedical optics and imaging
PublisherSPIE
Number3
Volume15
ISSN (Print)1605-7422

Conference

ConferenceOptical fibers and sensors for medical diagnostics and treatment applications XIV
CountryUnited States
CitySan Francisco, CA
Period1/02/142/02/14

Bibliographical note

Stefan Remund ; Anke Bossen ; Xianfeng Chen ; Ling Wang ; Adedotun Adebayo ; Lin Zhang ; Boris Považay and Christoph Meier. "Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating", Proc. SPIE 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 89381E (February 20, 2014).

Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

DOI: http://dx.doi.org/10.1117/12.2039409

Keywords

  • cost-effective spectrometer
  • miniaturized spectrometer
  • OCT spectrometer
  • optical coherence tomography
  • spectrometer approach
  • TFBG spectrometer
  • tilted fiber Bragg grating

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