High-Speed Optical Coherence Tomography System Using a 200-kHz Swept Light Source with a KTN Deflector

Yuichi Okabe, Yuzo Sasaki, Masahiro Ueno, Takashi Sakamoto, Seiji Toyoda, Junya Kobayashi, Masato Ohmi

Graduate School of Medicine, Course of Allied Health Science, Osaka University, Osaka, Japan.
NTT Photonics Laboratories, Nippon Telegraph and Telephone Corporation, Kanagawa, Japan.

DOI: 10.4236/opj.2013.32031                

Abstract

We demonstrate a high-speed swept-source optical coherence tomography (SS-OCT) system, which is based on a high-speed swept light source and a Mach-Zehnder interferometer with a high-speed photodetector. The light source is an external-cavity laser tuned by a KTN electro-optic deflector, which exhibits a very fast response and large deflection. The scanning wavelength range is almost 80 nm up to 200 kHz with a ±400-V deflector driving voltage. The system acquires 1 mm × 1 mm images consisting of 200 × 200 pixels within few milliseconds. We present preliminary SS-OCT images of an in-vitro human nail and an in-vivo finger pad.

Keywords

Swept-Source Optical Coherence Tomography; KTN; New Light Source

Conflicts of Interest

The authors declare no conflicts of interest.

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