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Advanced silicon photonic technologies enable integrated optical sensing andcommunication (IOSAC) in real time for the emerging application requirements ofsimultaneous sensing and communication for next-generation networks. Here, wepropose and demonstrate the IOSAC system on the silicon nitride (SiN) photonicsplatform. The IOSAC devices based on microring resonators are capable ofmonitoring the variation of analytes, transmitting the information to theterminal along with the modulated optical signal in real-time, and replacingbulk optics in high-precision and high-speed applications. By directlyintegrating SiN ring resonators with optical communication networks,simultaneous sensing and optical communication are demonstrated by an opticalsignal transmission experimental system using especially filtering amplifiedspontaneous emission spectra. The refractive index (RI) sensing ring with asensitivity of 172 nm/RIU, a figure of merit (FOM) of 1220, and a detectionlimit (DL) of 8.2*10-6 RIU is demonstrated. Simultaneously, the 1.25 Gbpsoptical on-off-keying (OOK) signal is transmitted at the concentration ofdifferent NaCl solutions, which indicates the bit-error-ratio (BER) decreaseswith the increase in concentration. The novel IOSAC technology shows thepotential to realize high-performance simultaneous biosensing and communicationin real time and further accelerate the development of IoT and 6G networks.

Exploring the Potential of Integrated Optical Sensing and Communication (IOSAC) Systems with Si Waveguides for Future Networks