Spectral domain optical coherence tomography with balanced detection using single line-scan camera and optical delay line

Min Gyu Hyeon, Hyung Jin Kim, Beop-Min Kim, Tae Joong Eom

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We propose a spectral domain optical coherence tomography (SD-OCT) system that uses a single line-scan detection scheme for balanced detection. Two phase-opposed spectra, generated by two optical fiber couplers, were detected by using a spectrometer with fast optical switching. A 2.69 km optical fiber was introduced to provide a proper time delay to prevent phase errors caused by the difference in measurement time between the two opposing spectra and unstable output voltages for controlling the galvano-scanner. Hence, a phase difference of π was obtained between the spectra over the sample depth without a phase error, which improved sensitivity by approximately 6 dB compared to that of conventional SD-OCT. We directly showed and compared the OCT images before and after applying the proposed balanced detection method in a phantom and in vivo sample.

Original languageEnglish
Pages (from-to)23079-23091
Number of pages13
JournalOptics Express
Volume23
Issue number18
DOIs
Publication statusPublished - 2015 Sep 7

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delay lines
tomography
phase error
cameras
optical fibers
optical switching
couplers
scanners
time lag
time measurement
spectrometers
output
sensitivity
electric potential

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Spectral domain optical coherence tomography with balanced detection using single line-scan camera and optical delay line. / Hyeon, Min Gyu; Kim, Hyung Jin; Kim, Beop-Min; Eom, Tae Joong.

In: Optics Express, Vol. 23, No. 18, 07.09.2015, p. 23079-23091.

Research output: Contribution to journalArticle

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