Dispersion flattened nonlinear square photonic crystal fiber for dental OCT

Author

Namihira, Yoshinori ; Hossain, Md.Anwar ; Jingjing Liu ; Koga, Toshitaka ; Kinjo, T. ; Hirako, Y. ; Begum, Farhana ; Kaijage, S.F. ; Razzak, S.M.A. ; Nozaki, S.

Author_Institution

Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan

fYear

2011

fDate

14-16 Oct. 2011

Firstpage

819

Lastpage

823

Abstract

The objective of this paper is to generate supercontinuum (SC) spectrums for dental optical coherence tomography (OCT) using proposed highly nonlinear dispersion flattened photonic crystal fiber (HNDF-PCF) as a propagating media of picosecond pulse easily produced by less expensive commercially available laser sources. This proposed HNDF-PCF has a very flat dispersion at 1.31 µm wavelength and by doping germanium (Ge) inside the core, nonlinear coefficient of the proposed HNDF-PCF is increased as large as 58.7 W⁻¹km⁻¹. Simulation results show that the proposed HNDF-PCF offers efficient SC light for dental OCT at 1.31 µm wavelength. Coherent length of the generated SC light is found 9.1 µm and spatial resolutions in the depth direction for dental OCT are found 5.5 µm for enamel and 5.9 µm for dentin.

Keywords

chromatic dispersion (D); nonlinear fiber optics; optical coherence tomography (OCT); photonic crystal fiber (PCF); supercontinuum (SC);

fLanguage

English

Publisher

iet

Conference_Titel

Communication Technology and Application (ICCTA 2011), IET International Conference on

Conference_Location

Beijing

Type

conf

DOI

10.1049/cp.2011.0783

Filename

6192979