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Proceedings Paper

OFDR with an SSG-DBR laser
Author(s): Takuji Amano; Hideaki Hiro-Oka; DongHak Choi; Hiroyuki Furukawa; Fumiyoshi Kano; Mitsuo Takeda; Motoi Nakanishi; Kimiya Shimizu; Kohji Obayashi
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Paper Abstract

Recently, frequency-domain (FD) -optical-coherence-tomography (OCT) methods have been investigated extensively as more efficient and sensitive system compared with conventional time-domain (TD) -OCT. Superstructure-grating-distributed-Bragg-reflector (SSG-DBR) lasers are particularly suited for optical-frequency-domain-reflectometry (OFDR) -OCT with its wide wavelength tunability and frequency agility. We have made a discrete frequency OFDR-OCT system with an SSG-DBR laser, which can tune the wavelength from 1533 to 1574 nm with tuning speed of 10μs per 0.1 nm step. The theoretical expression of the discrete frequency OFDR-OCT is given. Utilizing near-transparent nature of enamel of teeth in the wavelength region of the SSG-DBR laser and long object range of the OFDR-OCT, we have carried out OCT measurements on teeth. Experimental OCT imaging of a canine are reported here.

Paper Details

Date Published: 2 August 2004
PDF: 8 pages
Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, (2 August 2004); doi: 10.1117/12.559120
Show Author Affiliations
Takuji Amano, Kitasato Univ. (Japan)
Hideaki Hiro-Oka, Kitasato Univ. (Japan)
DongHak Choi, Kitasato Univ. (Japan)
Hiroyuki Furukawa, Kitasato Univ. (Japan)
Fumiyoshi Kano, NTT Photonics Labs. (Japan)
Mitsuo Takeda, Univ. of Electro-Communications (Japan)
Motoi Nakanishi, Kitasato Univ. (Japan)
Kimiya Shimizu, Kitasato Univ. (Japan)
Kohji Obayashi, Kitasato Univ. (Japan)

Published in SPIE Proceedings Vol. 5531:
Interferometry XII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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