Improvement of coherence length in a 200-kHz swept light source equipped with a KTN deflector

Shogo Yagi, Kazunori Naganuma, Tadayuki Imai, Yasuo Shibata, Jun Miyazu, Masahiro Ueno, Yuuichi Okabe, Yuzo Sasaki, Kazuo Fujiura, Masahiro Sasaura, Kazutoshi Kato, Masato Ohmi, Masamitsu Haruna

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

We are developing a new light source for swept-source OCT, namely, an external-cavity LD equipped with a KTN electro-optic deflector. Being free from mechanical resonance, our 1.3-μm laser exhibits scanning range of almost 100 nm up to 200-kHz under a ±300 V deflector driving voltage. Using a semi-empirically derived equation, we find that KTN's convex lens power degrades the coherence length, and this can be compensated with a cylindrical concave lens. Such compensation was experimentally confirmed by observing reduction of elliptical beam divergence. OCT images of a human fingernail are obtained using the swept source.

Original languageEnglish
Title of host publicationOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI
PublisherSPIE
ISBN (Print)9780819488565
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI - San Francisco, CA, United States
Duration: Jan 23 2012Jan 25 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8213
ISSN (Print)1605-7422

Other

OtherOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI
CountryUnited States
CitySan Francisco, CA
Period1/23/121/25/12

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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    Yagi, S., Naganuma, K., Imai, T., Shibata, Y., Miyazu, J., Ueno, M., Okabe, Y., Sasaki, Y., Fujiura, K., Sasaura, M., Kato, K., Ohmi, M., & Haruna, M. (2012). Improvement of coherence length in a 200-kHz swept light source equipped with a KTN deflector. In Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI [821333] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8213). SPIE. https://doi.org/10.1117/12.908210