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We demonstrate an extended depth of focus (DOF) for optical coherence tomography (OCT) using a Bessel-like higher order fiber mode. The DOF is enhanced by 7× and the lateral resolution is about 10 μm.
We simulate supercontinuum generation in an As2S3 chalcogenide photonic crystal fiber with a hexagonal structure, optimizing the fiber pitch and pulse duration with a 2.8 μm laser source in order to maximize the output bandwidth.
We present a simple fabrication method for embedding gold nanoparticles (GNPs) in a microfiber with two main advantages. The GNPs are positioned within the microfiber securing maximum enhancement of the electrical field and protection of the GNPs from the surroundings; moreover incoupling losses to the microfiber are reduced significantly by integrating a single mode fiber in the device. The average...
We found that 25% of the input power of a 2 mum wavelength 1 kW peak-power source can be shifted into the region between 3-5 mum using an As2S3-based chalcogenide PCF. Tapering increases the output at wavelengths above 4 mum.
A super broadband OFDM-radio-over-fibre system with a record bandwidth of 16 Gbit/s to transmit over both 20 km SMF-28 and wireless distance of over 6 m has been experimentally demonstrated.
8 times 11.5 Gbit/s (10 Gbit/s after coding) optical OFDM transmission over 1000 km standard single mode fibre (SSMF) with conventional distributed feedback (DFB) lasers and direct-detection is demonstrated. Compared with coherent-detection using external cavity lasers (ECL), DFB lasers and direct-detection can significantly reduce the system complexity and cost.
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