Dispersion flattened photonic crystal fibers for supercontinuum generation in a telecommunication window

Author

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

Author_Institution

Grad. Sch. of Eng. & Sci., Univ. of the Ryukyus, Okinawa, Japan

fYear

2011

fDate

14-16 Oct. 2011

Firstpage

815

Lastpage

818

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

biomedical optical imaging; dentistry; elemental semiconductors; germanium; holey fibres; optical tomography; photonic crystals; semiconductor doping; supercontinuum generation; dental optical coherence tomography; dentin; dispersion flattened nonlinear square photonic crystal fiber; doping germanium; enamel; laser sources; picosecond pulse; spatial resolutions; supercontinuum spectrums; wavelength 1.31 mum; chromatic dispersion (D); nonlinear fiber optics; photonic crystal fiber (PCF); supercontinuum (SC); telecommunication window;

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.2011.0782

Filename

6192978