Abstract
We propose broad supercontinuum spectrum generating highly nonlinear photonic crystal fiber (HN-PCF) which can be used in ultrahigh- resolution optical coherence tomography and optical transmission systems. Using full vector finite difference method, we investigated the different properties of HN-PCF. Broadband su-percontinuum spectrum is numerically calculated by using nonlinear Schr?dinger equation. Investigation showed that it is possible to obtain longitudinal resolution in a biological tissue of 1.3 μm, 1.2 μm and 1.1 μm by using picosecond continuum light at center wavelengths of 1.06 μm, 1.31 μm and 1.55 μm, respectively.
Highlights
Photonic crystal fibers (PCFs) are new class of optical waveguide in recent years
We explore the possibility of generating supercontinuum spectrum by using picosecond pulses in six-ringed highly nonlinear photonic crystal fiber (HN-PCF) ultrahigh-resolution optical coherence tomography (OCT) and optical transmission systems
For ultrahigh-resolution OCT imaging lc should be low value because lr is proportional with lc
Summary
Photonic crystal fibers (PCFs) are new class of optical waveguide in recent years. PCF consists of a thread of silica with a lattice of microscopic air capillaries running along the entire length of the fiber. Ultrahigh-resolution OCT in biological tissue, achieving high longitudinal resolution at center wavelength near 1.0 μm [10,11,12], 1.3 μm [13,14] and 1.55 μm [15], has been demonstrated with femtosecond lasers as low coherence light sources. We have reported that it is possible to achieve broad supercontinum spectrum, high longitudinal resolution in biological tissue by using HN-PCF with ultraflattened chromatic dispersion properties [16]. We explore the possibility of generating supercontinuum spectrum by using picosecond pulses in six-ringed highly nonlinear photonic crystal fiber (HN-PCF) ultrahigh-resolution OCT and optical transmission systems. Picosecond pulse laser source is cheaper than that of femtosecond laser source in this case it attracts in practical implementation
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