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Application-specific integrated circuit (ASIC) is at the core of modern ultra-high-speed transponders employing advanced digital signal processing (DSP) algorithms. Jointly to advanced transmission techniques, such as probabilistic shaping and digital sub-carrier multiplexing, it enables high capacity coherent transmission. In this invited contribution, we present our recent data-rate × distance record with experimental transmission of all real-time 800G channel over 1000 km in full C-band.

This paper introduces GaitEnable, a robotic gait trainer composed of an actuated omnidirectional mobile base, a passive body weight support (BWS) system, and a reactive control system that can initiate, sustain, stabilize or perturb a user's gait. The device is designed to provide minimal constraints to the user's natural motion, and its actuated mobile base can move cooperatively with the user in any direction. Data from preliminary experiments performed by a healthy male subject confirm that the reactive control system can compensate for the device's inertial effects and that the device's omnidirectional mobile base reduces pelvis and torso motion constraints. The results also demonstrate that GaitEnable can easily be programmed to simulate different types of behaviours or motion constraints.

This paper introduces a novel assistive device (AD) control strategy that provides intermittent assistance and is capable of encouraging user effort during AD use. The assistance regulation controller (ARC) presented here is designed to regulate joint torque and can be used for arbitrary joint and limb motions without requiring any a priori information about the user's intended motion. Data from eight healthy subjects who performed a forearm tracking experiment using a single degree-of-freedom powered orthosis demonstrate that the ARC is capable of encouraging user effort. On average, subjects generated 40% more joint torque when performing the tracking experiment with the ARC instead of a conventional torque-amplifying controller. The results also demonstrate that the ARC is safe to use for dynamic orthosis-assisted joint motions which require several transitions into and out of the assistance and no assistance states of the controller. As such, the results also confirm that the ARC is an effective assist-as-needed control strategy suitable for use with ADs.

A multi-spectral laser sensor using the orthogonal code-division multiplexing technique is applied to measure the optical properties of biological-like turbid media. Measurement of the total attenuation coefficient of Intralipid was obtained for wavelength from 0.65 to 1.55 /spl mu/m, which is the longest near-IR wavelength measured for this material, giving an empirical fit of /spl lambda//sup -2.43/. The advantage of CDM techniques against interference was demonstrated by simulating the detection of a contaminant is cow milk under rapid agitation.

Summary form only given. A short-range spectral lidar based on the code-division multiplexing (CDM) architecture using mid-infrared Sb semiconductor lasers for remote sensing has been demonstrated with near detector-limited performance. The system principle is similar to optical-CDMA for communications and applicable to any number of wavelengths, but was demonstrated with two wavelengths similarly to conventional DIAL (Powers et al, Appl. Opt. vol. 39, pp. 1440-1448, 2000; McRae and Kulp, Appl. Opt. vol. 32, pp. 4037-4050, 1993). An experiment using