En-face OCT system at 1060 nm

Neagua, L. and Lobo Ribeiro, A.B. and Cucu, R.G. and Bradu, Adrian and Ma, L. and Podoleanu, Adrian G.H. (2008) En-face OCT system at 1060 nm. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. Spie-Int Soc Optical Engineering ISBN 978-0-8194-7380-6. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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A highly efficient power optical coherence tomography configuration is implemented using a Multiwave Photonics broadband source centred at 1060 nm wavelength, FWHM = 50 nm and a Mach Zehnder interferometer. The interferometer contains a fibre acousto-optic modulator in each arm. One is driven at a fixed frequency of 40 MHz while the other via an RF Function Generation. In this way, the en-face OCT signal is modulated on a carrier frequency adjustable in the range 0 kHz to 1.5 MHz. A circulator is placed in the sample arm. Light retroreflected from the sample is sent via the circulator to a balanced coupler where it interferes with the reference beam. A translation stage is used in the reference arm to adjust the optical path difference in the interferometer. The result is photodetected using two InGaAs photodetectors followed by a differential amplifier in a balance detection configuration The system has been used to acquire en-face images as well as cross section optical coherence tomography images from skin and embryos based on T-scans (transversal reflectivity profiles).

Item Type: Conference or workshop item (Proceeding)
Uncontrolled keywords: Embryos; En-face OCT images; Fiber acousto-optic modulator; Mach zehnder interferometer
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
T Technology > TA Engineering (General). Civil engineering (General) > TA1520 Optical Engineering
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 11:45 UTC
Last Modified: 27 Jul 2015 10:58 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49720 (The current URI for this page, for reference purposes)
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