Title :
200 kHz swept light source equipped with KTN deflector for optical coherence tomography
Author :
Okabe, Yasuo ; Sasaki, Yutaka ; Ueno, Masahiro ; Sakamoto, Takanori ; Toyoda, Seiji ; Yagi, S. ; Naganuma, K. ; Fujiura, K. ; Sakai, Yoshiki ; Kobayashi, Junya ; Omiya, K. ; Ohmi, M. ; Haruna, M.
Author_Institution :
NTT Photonics Labs., Atsugi, Japan
Abstract :
A new light source for swept-source optical coherence tomography (SS-OCT) is presented, namely, an external-cavity LD equipped with a KTN electro-optic deflector. The KTN deflector is unique in being very fast and simultaneously providing an appreciable deflection caused by injected carriers. Being free from mechanical resonance, the 1.3 m laser exhibits a scanning range of almost 80 nm up to 200 kHz with a 400 V deflector driving voltage. Preliminary SS-OCT images of a human fingernail and finger skin have been obtained using the swept light source.
Keywords :
electro-optical deflectors; laser applications in medicine; laser cavity resonators; light sources; optical tomography; semiconductor lasers; KTN deflector; KTN electro-optic deflector; deflector driving voltage; external-cavity LD; finger skin have; frequency 200 kHz; human fingernail; swept light source; swept-source optical coherence tomography; voltage 400 V; wavelength 1.3 m;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.4057
