Intensity-modulated abrupt tapered Fiber Mach-Zehnder Interferometer for the simultaneous sensing of temperature and curvature

AbstractAn abrupt tapered fiber In-Line Mach-Zehnder Interferometer sensor for simultaneous measurement of temperature and curvature is proposed and experimentally demonstrated. The sensor head is fabricated by arcing Corning SMF-28 using a commercial arc fusion splicer. The individual parameters discrimination was achieved by manipulating the unequal sensitivities of optical power to temperature and curvature obtained at two wavelengths within the sensing spectrum. The curvature and temperature sensitivities at λ1 (1537nm) and λ2 (1568.7nm) were found to be 11.8264dBm/m−1, 12.4885dBm/m−1 and 0.0829dBm/°C, 0.0833dBm/°C, respectively. The experimental results show unperturbed readings with rms deviation of ±0.1801m−1 and ±0.0826°C, for curvature and temperature measurements, respectively, through measurement of optical power response of the sensor. With this simultaneous sensing technique, the proposed sensor can be deployed for many field applications such as nondestructive structural health monitoring of civil infrastructure

Low-Cost Integration of MIMO-RoF based on 5G UFMC Waveform and Wired OFDM Signal over PON

A low cost fibre-wireless (FiWi) convergent network architecture including two multiple-input multiple-output (MIMO) wireless signals based on a 5G universal filter multicarrier (UFMC) waveform and wired signal over orthogonal frequency division multiplexed passive optical network (OFDM-PON) is presented. The proposed scheme utilizes a single side band frequency translation (SSB-FT) technique to provide a smooth and cost-efficient convergent system. A proof-of-concept downstream link over a 20 km standard-PON is conducted by simulation to confirm the successful transmission of 1 Gb/s data rate for each MIMO and 2.5 Gb/s for the wired signal using error vector magnitude (EVM) and bit error rate (BER) measurements