Customized analog circuit design for fiber-based optical coherence microscopy

Wei Xu, Garret T. Bonnema, Kirk W. Gossage, Norman H. Wade, June Medford, Jennifer K Barton

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Optical coherence microscopy (OCM) is an interferometric method for acquiring high-resolution, depth-resolved, en face images. In this article we demonstrate a fiber-based OCM system with analog fringe generation and signal demodulation. A high power operational amplifier drives a mirrored piezoelectric stack mounted in the reference arm of the interferometer causing a displacement equal to 0.42 times the light source center wavelength. The drive signal is synchronized with the demodulation frequency of two analog lock-in amplifiers which extract the first and second harmonics of the interferometric component of the signal. Four outputs (X and Y components of first and second harmonics) are acquired with a data-acquisition board and combined to eliminate the slow phase drift in the interferometer. A sample image of carrot tap root is presented. High dynamic range images are obtained at acquisition speeds up to 40 000 pixelss.

Original languageEnglish (US)
Article number016104
Pages (from-to)1-3
Number of pages3
JournalReview of Scientific Instruments
Volume77
Issue number1
DOIs
StatePublished - 2006

Fingerprint

analog circuits
Analog circuits
Demodulation
Interferometers
Microscopic examination
demodulation
microscopy
fibers
Fibers
Operational amplifiers
interferometers
Power amplifiers
analogs
Light sources
harmonics
operational amplifiers
Data acquisition
taps
power amplifiers
Wavelength

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Cite this

Customized analog circuit design for fiber-based optical coherence microscopy. / Xu, Wei; Bonnema, Garret T.; Gossage, Kirk W.; Wade, Norman H.; Medford, June; Barton, Jennifer K.

In: Review of Scientific Instruments, Vol. 77, No. 1, 016104, 2006, p. 1-3.

Research output: Contribution to journalArticle

Xu, Wei ; Bonnema, Garret T. ; Gossage, Kirk W. ; Wade, Norman H. ; Medford, June ; Barton, Jennifer K. / Customized analog circuit design for fiber-based optical coherence microscopy. In: Review of Scientific Instruments. 2006 ; Vol. 77, No. 1. pp. 1-3.
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