The University of Tokyo · Materials Science
Professor Hiroaki Abe's research lab specializes in biomedical engineering and applied photonics, focusing on improving gait stability and mobility in stroke survivors through innovative orthotic devices and advanced laser technologies. The lab investigates the biomechanical and physiological impacts of plastic ankle-foot orthoses (PAFO) on hemiplegic patients, aiming to enhance walking performance and reduce fall risk. Concurrently, the lab explores novel semiconductor laser designs, particularly single-mode distributed feedback lasers using post-growth processing and waveguide engineering, for applications in optical communications and sensing. These interdisciplinary efforts bridge clinical rehabilitation with cutting-edge photonics research.
Figures are computed from collected data and may differ slightly.
The number of RCD patients who exhibited PB was higher than that of LCD patients. The duration of recovery from PB was longer in RCD patients than in LCD patients.
Stroke is the leading cause of long-term disability, and many stroke patients have hemiparesis. Hemiparesis induces ankle-control disturbances and equinovarus deformity, leading to difficulty in walking and an increased risk for falling. Plastic ankle-foot orthosis (PAFO) is frequently prescribed to correct ankle joint alignment and increase walking speed and stride length during ambulation. While several studies have shown that PAFO improves gait parameters, such as stride length and walking sp
Single-mode distributed feedback laser operation can be achieved by introducing an appropriate phase jump within the feedback grating, causing lasing to occur within the stop-band. One possible approach involves variation of the waveguide stripe width in an index-guided structure, in conjunction with a grating of uniform periodicity. If the phase change is allowed to accumulate over a sufficient length of the width perturbed stripe waveguide, a /spl lambda//4 shift can be realized. We report the
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