TITLE:
High-Speed Optical Coherence Tomography System Using a 200-kHz Swept Light Source with a KTN Deflector
AUTHORS:
Yuichi Okabe, Yuzo Sasaki, Masahiro Ueno, Takashi Sakamoto, Seiji Toyoda, Junya Kobayashi, Masato Ohmi
KEYWORDS:
Swept-Source Optical Coherence Tomography; KTN; New Light Source
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.2,
June
7,
2013
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.