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We present a laser-spectroscopic method for continuous and simultaneous interrogation of multiple passive gas sensor nodes in a fiber based sensor network. Enabled by chirped laser dispersion spectroscopy, methane leak detection is demonstrated as an example application.
We have demonstrated a waveguide polariser with high extinction ratio on a polymer optical waveguide coated with multi-layer graphene oxide ‘paper’. Coating was carried out using the drop-casting technique and a concentrated solution of graphene oxide flakes. For an appropriate thickness of graphene oxide, an extinction ratio of approaching 40 dB was measured at 1590 nm, with a variation of only 4...
Graphene has already become an established medium for novel photonic devices and their applications. In some cases, e.g. the use of graphene as a non-linear medium with saturable absorption properties, it is experimentally convenient to use the readily available form that is known as graphene oxide. Moreover, technological and scientific developments that are advancing control of the properties of...
A simple and low cost remote up conversion (RUC) scheme is proposed using only one optical modulator. The baseband (BB) data and local oscillator (LO) signal are electrically coupled to drive a commercial intense modulator (IM). The laser source and IM can be shared by both BB data and LO signal. With less than 0.3dB power penalty, the 2.5Gbps on-off keying (OOK) data over 50km single mode fiber (SMF)...
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