We present the demonstration of an integrated frequency modulated continuous wave LiDAR on a silicon platform. The waveform calibration, the scanning system, and the balanced detectors are implemented on a chip. Detection and ranging of a moving hard target at upto 60 m with less than 5 mW of output power is demonstrated in this paper. Index Terms-Coherent LiDAR, frequency modulated continuous wave LiDAR, laser range finder, optical sensing and sensors, photonic integrated circuits. Patrick Feneyrou received the Ph.D. degree in nonlinear spectroscopy. Since 1998, he is with the Thales Research and Technology, Palaiseau, France. Since 2003, he is in charge of the theoretical analysis, system simulation, and development of proof of concept of LiDAR systems. He has developed several LiDAR systems for laser anemometry, temperature sensing, range finding, and velocimetry. Jérôme Bourderionnet received the Ph.D. degree in laser physics. Since 2001, he has been working with the

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A two dimensional photonic crystal (PhC) resonator, based on a recent design concept, entirely embedded in Silica, is fabricated in a CMOS full-process multiproject wafer, including additional steps such as implantation, metalization, Germanium deposition and planarization. A large loaded Q-factor (5.9 × 10) is achieved without removal of the silica cladding. A statistical analysis over 56 devices leads to an average value for the loaded Q of 4 × 10, in close agreement with calculations. An upper boundary for the fabrication disorder is estimated to 1.2 nm.

This article presents an experimental demonstration of a high-capacity millimeter-wave 5G NR signal transmission with analog radio-over-fiber (ARoF) fronthaul over multi-core fiber and full real-time processing. The demonstration validates the core of the blueSPACE fronthaul architecture which combines ARoF fronthaul with space division multiplexing in the optical distribution network to alleviate the fronthaul capacity bottleneck and maintain a centralized radio access network with fully centralized signal processing. The introduction of optical beamforming in the blueSPACE architecture brings true multi-beam transmission and enables full spatial control over the RF signal. The proposed ARoF architecture features a transmitter that generates the ARoF signal and an optical signal carrying a reference local oscillator employed for downconversion at the remote unit from a single RF reference at the central office. A space division multiplexing based radio access network with multi-core fibre allows parallel transport of the uplink ARoF signal and reference local oscillator at the same wavelength over separate cores. A complete description of the real-time signal processing and experimental setup is provided and system performance is evaluated. Transmission of an 800 MHz wide extended 5G NR fronthaul signal over a 7-core fibre is shown with full real-time signal processing, achieving 1.4 Gbit/s with a bit error rate $$<3.8\times 10^{-3}$$ < 3.8 × 10 - 3 and thus below the limit for hard-decision forward error correction with 7% overhead.

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