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An array of three long period gratings (LPGs) fabricated in a single optical fibre and multiplexed in the wavelength domain was used to measure simultaneously temperature, relative humidity (RH) and volatile organic compounds (VOCs). Each LPG sensor was designed to optimize its response to a desired measurand. The LPGs were fabricated with periods such that they operated at or near the phase matching...
The formation of poly(acrylic acid), PAA, -anchored polyelectrolyte multilayers on an optical fibre long period grating (LPG) by the layer-by-layer (LbL) assembly technique for highly sensitive ammonia gas detection is reported. PAA could act as a receptor for binding of amine compounds, especially ammonia, which would induce changes in the coating properties such as optical thickness (OT), film thickness/density...
We experimentally actuate mechanical whispering-gallery modes and wineglass modes in ultra-high-Q microfluidic optomechanical resonators by means of the electrostrictive Brillouin scattering nonlinearity. These devices mechanically oscillate at frequencies ranging over several orders-of-magnitude (7.4 MHz–11 GHz). We test the devices with sucrose solutions to determine sensitivity of the mechanical...
We demonstrate a long-range Brillouin optical time-domain analysis (BOTDA) sensor system with a sensing range up to 100-km by combining an anti-Stokes single sideband suppressed-carrier modulation technique with an in line mid-span bidirectional EDFA.
This letter demonstrates a 40-Gb/s optical double-sideband (ODSB) orthogonal frequency-division multiplexing passive optical network (OFDM-PON) system using a cost-effective 10-GHz-bandwidth electroabsorption modulator (EAM). By employing a subcarrier-adaptive modulation format and pre-emphasis, we successfully achieve 20-km EAM-based single-mode-fiber (SMF) transmission.
We present a novel distributed sensing technique that makes possible the observation of Brillouin gain spectral distribution and acoustic decay time in photonic crystal fiber as well as in standard single-mode fiber.
We demonstrate novel detuned dual-mode laser for tunable continuous-wave terahertz generation with InGaAs-based photomixers. The beat frequency from this dual-mode multisection laser is continuously tuned from 0.30 to over 1.15 THz.
A novel four-tone probe signal is used to measure end-to-end residual chromatic dispersion in single 50-GHz DWDM channels of a long-haul ROADM network while transmitting more than 30 live signals in neighboring channels.
111-Gb/s transmission combined with 2 times 43-Gb/s and 8 times 10.7-Gb/s on a 50-GHz grid over 1,040-km field fiber and two ROADMs is demonstrated, showing the feasibility of 100G overlaying existing 10G/40G commercial systems.
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