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The periodic optical power distribution of the optical microfiber coupler is calculated by numerical simulation with beam propagation method. A kind of solution sensor using microfiber coupler (MFC) surrounded with sucrose solution is experimentally demonstrated, and the experimental results show that the sensitivity of the sensor is wavelength-dependent. Both theoretical and experimental results...
We experimentally demonstrate the wireless transmission of optically generated DPSK signals based on heterodyne detection with high receiver sensitivity. Using this scheme, an approach to deliver two DPSK channels is proposed for FDM application.
A novel QAM coherent subcarrier multiplexing system which is based on heterodyne detection is proposed and demonstrated experimentally. At the transmitter side, intermediate frequency carrier modulation which is used for subcarrier enables demodulation of QAM with heterodyne detection. The experiment and theoretical simulation show that the coherent optical system operating for multi-channel using...
The integration of distributed optical fiber temperature sensor with supervisory control and data acquisition (SCADA) system is proposed and implemented. In the implementation of the integration, both the compatibility with traditional system and the characteristics of distributed optical fiber temperature sensor is considered before Modbus TCP/IP protocol is chosen. The protocol is implemented with...
A tunable spectral bandpass filter which includes two fibers with different bend loss edges-a solid-core photonic bandgap fiber with short wavelength bend loss edge and a Bragg fiber with long wavelength bend loss edge-is presented in this letter. The central wavelength and the bandwidth can be widely tuned around 1100 nm by controlling the bend diameters of the two fibers respectively. It can be...
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