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

Remund, S. and Bossen, A. and Chen, X. and Wang, L. and Adebayo, A. and Zhang, L. and Povazay, B. and Meier, C. (2014) Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating. In: Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, San Francisco, US (February 20, 2014).

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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. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Research Publications
Departments: College of Physical and Applied Sciences > School of Electronic Engineering
Date Deposited: 02 Apr 2016 03:14
Last Modified: 02 Apr 2016 03:14
URI: http://e.bangor.ac.uk/id/eprint/6446
Identification Number: DOI: 10.1117/12.2039409
Publisher: SPIE
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