Ultrawideband photonic crystal fiber coupler for multiband optical imaging system.
We report a photonic crystal fiber (PCF) coupler having an ultrawide spectral bandwidth keeping single mode operation. The use of the PCF coupler in a fiber-based optical coherence tomography (OCT) system enables us to handle the wide spectral bands of various light sources, including superluminescent diodes (SLDs) at 1300 nm and 820 nm, Ti:sapphire lasers, and white-light sources. The multiband imaging performances of the PCF-based OCT system are demonstrated by obtaining dental images at 1300 nm and 820 nm with the same setup. In addition, we show that the PCF coupler could cover the spectrum over a one octave span and guide both the fundamental wave (1030 nm) and the second harmonic wave (515 nm) simultaneously.
Ryu
Seon Young
SY
Division of Instrument Development, Korea Basic Science Institute, 113 Gwahangno, Yusung-gu, Daejeon 305-333, Korea.
Choi
Hae Young
HY
Choi
Eun Seo
ES
Tomov
Ivan
I
Chen
Zhongping
Z
Lee
Byeong Ha
BH
D003460:Crystallization; D006801:Humans; D007834:Lasers; D055100:Optical Fibers; D041623:Tomography, Optical Coherence / Q000295:instrumentation*; D014070:Tooth / Q000033:anatomy & histology