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D-shaped optical fiber microwire (OFM) devices are investigated theoretically. They can be fabricated by wrapping the OFM on a removable rod or substrate. Optical wave guiding properties of these devices are discussed with numerical simulations. Dispersion properties of OFMs with different radius are studied as well. A grating based D-shaped OFM is proposed for sensing applications. The corresponding...
We present an alternative to fabricate ultra-small air-gap micro-cavity based Fabry-Perot interferometer (AG-MC-FPIs) for high-temperature sensing by focused ion beam (FIB) machining in tapered fiber tips (TFTs). Its size is smaller than 10μm and the sensitivity is ~20 pm/°C near the wavelength of 1550 nm.
We propose a photoelastic pressure sensor using a liquid crystal (LC) tunable fiber polarizer. The polarizer contains an etched single-mode fiber sealed in an LC cell. A low-index LC is used as a tunable birefringent cladding of the fiber. Any electric-field-induced LC director reorientation may thus affect the fiber's light-guiding characteristics. Different polarization states experience different...
A novel refractometric sensor based on an embedded optical microfiber loop resonator is presented. The device sensitivity has been studied in two typical configurations and its dependence on the nanowire diameter and coating thickness determined.
We experimentally demonstrated a novel refractometric sensor based on a coated optical microfiber coil resonator which is robust, compact, and comprises an intrinsic fluidic channel. The measured sensitivity has an excellent agreement with theoretical predictions.
In this paper, a novel graft copolymer, poly-(L-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) with part of the PEG chains carrying a terminal nitrilotriacetic acid group (NTA) was synthesized. Through electrostatic interactions, these polycationic graft co-polymers assemble spontaneously from aqueous solution onto negatively charged surfaces, forming polymeric monolayers that present NTA groups...
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