東京大学 · 物理学・天文学
Sze Yun Set教授の研究室では、カーボンナノチューブを用いた新規な光デバイスの開発に注力しています。特に、超短パルスレーザーの実現に不可欠なスイッチング特性に優れたサチュラブル吸収体(SAINT)の開発が中心であり、産業用レーザー技術の次世代ソリューションをめざしています。また、2μm帯の全ファイバー型モードロックレーザーや高速波長スイープ光源の開発を通じて、光通信・医療イメージング分野への応用も進んでいます。
Figures are computed from collected data and may differ slightly.
This paper describes a new class of saturable absorber device based on single-wall carbon nanotube (SWNT)-the saturable absorber incorporating nano tube (SAINT). The device possesses ultrafast optical properties comparable to that of the industrial standard semiconductor saturable absorber mirror (SESAM). Passively mode-locked picosecond fiber lasers in different configurations are demonstrated using SAINTs as mode lockers. This is the first demonstration of optical pulsed lasers based on the ca
We present the first passively mode-locked fiber lasers based on a novel saturable absorber incorporating carbon nanotubes (SAINT). This device offers several key advantages such as: ultrafast recovery time (<1 ps), high-optical damage threshold, mechanical and environmental robustness, chemical stability, and the ability to operate in transmission, reflection, and bidirectional modes. Moreover, the fabrication cost and complexity of SAINT devices are potentially lower than that of conventional
A novel passively mode-locked fiber laser is demonstrated using saturable absorber based on single-walled carbon nanotubes. This is the first demonstration of an optical pulsed laser based on carbon nanotube technology.
We demonstrate for the first time, to the best of our knowledge, a thulium-doped, all-fiber, mode-locked laser using a carbon nanotube saturable absorber, operating in the dissipative-soliton regime and the stretched-pulse-soliton regime. The net dispersion of the laser cavity is adjusted by inserting different lengths of normal dispersion fiber, resulting in different mode-locking regimes. These results could serve as a foundation for the optimization of mode-locked fiber-laser cavity design at
We present an ultra-fast saturable absorber device based on single-walled carbon nanotubes. The saturable absorbing effect was observed using 1 ps optical pulses at 80 GHz. This device possesses promising characteristics for applications such as a noise suppressor or a mode-locker.
In this paper, we present a high-speed wavelength-swept laser for application in a real-time optical device characterization system. The system is capable of simultaneous measurement of both the spectral amplitude and group-delay responses of the device-under-test, at a scan rate of 22 Hz over a wide wavelength range of 50 nm. This corresponds to a record sweep rate of >1000 nm/s.
This paper presents the first demonstration of a pulsed laser based on a saturable absorber incorporating carbon nanotubes (SAINT), capable of mode-lock/Q-switch dual-regime operation. The carbon nanotube-based device shows unparallel performance with a potential to greatly impact pulse laser design and development.
Open papers in the app to read, cite, and organize with AI.