Cernat, Ramona, Podoleanu, Adrian G.H., Gnewuch, H. (2004) Avalanche photodiode based optical coherence tomography. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. 5459. pp. 185-191. Spie-Int Soc Optical Engineering (doi:10.1117/12.545421) (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) (KAR id:49774)
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. | |
Official URL: http://dx.doi.org/10.1117/12.545421 |
Abstract
Optical Coherence Tomography (OCT) is used to perform in vivo high-resolution imaging of biological tissue microstructures. In the present study, we evaluate the optimum conditions to use Avalanche photodiodes (APDs) in OCT to achieve maximum signal-to-noise (S/N) ratios. The optical sources employed in OCT have a large bandwidth. Due to beating within the source line-width, excess photon noise (EPN) is generated in addition to shot noise (SN). Usually, high speed OCT requires large optical power, which makes the EPN to dominate over the SN. Therefore, balanced detection is used to reduce the EPN. We analyse the optimisation of the OCT configuration with respect to the APD noise performance. When using APDs, another parameter has to be considered in the S/N analysis: that of the voltage across the APDs, which determines, both, the gain and the noise.
Item Type: | Conference or workshop item (Proceeding) |
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DOI/Identification number: | 10.1117/12.545421 |
Uncontrolled keywords: | Avalanche photodiode, Excess photon noise, Optical coherence tomography, Silicon pin photodiode, Acoustic noise, Demodulation, Electric potential, Imaging techniques, Photodetectors, Photodiodes, Tomography, Avalanche photodiode (APD), Excess photon noise (EPN), Optical coherence tomography (OCT), Silicon pin photodiode, Coherent light |
Subjects: |
Q Science > QC Physics R Medicine > R Medicine (General) > R857.O6 Optical instruments |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | Giles Tarver |
Date Deposited: | 24 Jul 2015 15:43 UTC |
Last Modified: | 16 Nov 2021 10:20 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/49774 (The current URI for this page, for reference purposes) |
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