Start Global Navigation

  1. Home
  2. About RCAST
  3. Research
  4. Industry-Academia-Government Collaboration
  5. International Collaboration

Start Main Contents

Researcher's Profile


Information Devices


Tel: 03-5841-6659

FAX: 03-5841-6025

Link of outside open a new window Laboratory Homepage

2019 Research book (PDF: 1.1MB)


1991.02   Research Associate, RCAST, The University of Tokyo(UTokyo) 
1994.08   Lecturer, RCAST, UTokyo 
1995.04   Lecturer, School of Engineering, UTokyo 
1996.04   Visiting Research Fellow, ORC, Southampton Univ., UK (-1998.4) 
1998.04   Associate Professor, School of Engineering, UTokyo 
1999.04   Associate Professor, School of Frontier Sciences, UTokyo 
2004.04   Associate Professor, School of Engineering, UTokyo 
2009.07   Professor, School of Engineering, UTokyo 
2013.04   Professor, RCAST, UTokyo

Research Interests

We, the Yamashita-Lab., are mainly focusing on photonic devices, such as fiber devices and lasers, for telecom, sensing, and medical applications, and also on their system applications.

- Fast and wide wavelength tunable fiber lasers and their OCT applications We are working on the fiber lasers using Rare-earth-doped fibers or semiconductors for telecom and sensing applications. We are currently emphasizes on fast and wide wavelength tunable fiber lasers having very wide tuning range (>100nm) and a very fast tuning speed (Repetition rate > 100kHz). We are also trying to apply the lasers to the optical coherence tomography systems (OCT).

- Nanocarbon photonic devices and their applications Nanocarbons, such as Carbon nanotubes (CNT) and graphene, have very interesting useful, not only mechanical and electrical, but also photonic properties. We are pursuing researches on nanocarbon photonics. We concentrate on the stable and high-energy short-pulse fiber lasers using the nanocarbons. Nanocarbons have very fast saturable absorption, which enables generation of short (~1ps) optical pulses through passive mode locking. We also demonstrated ultra-wideband supercontinuum (SC) generation using the laser as a seed source. We are trying to apply the SC source to the OCT system.

- Photonic devices for telecom and sensing applications We are also working on photonic devices for telecom and sensing applications, such as wavelength converter and parametric amplifier using fiber nonlinearity, fiber lasers, and fiber filters.


Optical fiber communications, Optical fiber sensors, Optical fiber lasers, Carbon nanotube, Graphene

Start Site Information

page top

Copyright (c) RCAST, The University of Tokyo