page_title: Yasuharu Suematsu
section_title: Research
hierarchical_section_title: Yasuharu Suematsu / Research
caption_attribution_description: English: Replica of the earliest demonstration of optical fiber communication experiment, in May 26, 1963, restored in 2008-7. (Registered as Future Technology Heritage, at the National Museum of Science, Japan). By courtesy of the Museum of Tokyo Institute of Technology.
context_page_description: Yasuharu Suematsu is researcher and educator in optical communication technology by invention of the Dynamic Single Mode Semiconductor Lasers for actuation and following development of large capacity and long distance optical fiber communications.
context_section_description: Professor Suematsu is best known for his contributions to the development of optical fiber communication.
  He developed semiconductor lasers which even under high-speed modulation produce light at a stable wavelength
  which coincides with the wavelength region where the optical losses of fibers reach its minimum.
caption: Fig.1. Replica of the earliest demonstration of optical fiber communication experiment, in May 26, 1963, restored in 2008-7. (Registered as Future Technology Heritage, at the National Museum of Science, Japan). By courtesy of the Museum of Tokyo Institute of Technology.
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