Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Yuji Suzuki"'
Autor:
Yuji Suzuki, Tadashi Nakamura, Hidetoshi Murakami, Hiroshi Takahashi, Nobuhiko Sarukura, Shingo Ono
Publikováno v:
Japanese Journal of Applied Physics. 42:4330-4333
This is a report on the mode-locking stability of a Kerr-lens mode-locked Ti:sapphire, measured by a newly developed noise measurement method. Mode-locking stability is monitored via a power spectrum, which is obtained by irradiating optical pulses o
Autor:
Nobuhiko Sarukura, Tsuguo Fukuda, Zhenlin Liu, Toshimasa Kozeki, Kiyoshi Shimamura, Yuji Suzuki
Publikováno v:
Optical Materials. 19:123-128
A large Ce3+:LiCaAlF6 (Ce:LiCAF) crystal with 15 mm diameter was grown successfully by the Czochralski method. Owing to its large size, 60 mJ, 289 nm pulses were generated directly from a quasi-coaxially pumped Ce:LiCAF laser. In addition, a new nonc
Autor:
Fumio Sakai, Toshimasa Kozeki, Hideyuki Ohtake, Yasushi Aoki, Terunobu Nakajyo, Nobuhiko Sarukura, Yuji Suzuki
Publikováno v:
The Review of Laser Engineering. 30:662-665
A table-top sized hybrid fluorescence spectroscopy system with picosecond, 3-MeV electron-beam from a photocathode and picosecond optical pulses was successfully demonstrated. This system has shown that the properties of an electron-beam pumped Ce:Li
Autor:
Zhenlin Liu, Hideo Hosono, Toshimasa Kozeki, Kiyoshi Shimamura, Masahiro Hirano, Tsuguo Fukuda, Nobuhiko Sarukura, Yuji Suzuki
Publikováno v:
Review of Scientific Instruments. 72:2875-2878
A two-crystal, pump and probe scheme is established allowing the evaluation of potential laser materials with unknown gain and loss properties. Using a streak camera coupled to a spectrograph, the time-resolved gain or loss spectra are obtained using
Autor:
Masahiro Hirano, Yuji Suzuki, Hideo Hosono, Toshimasa Kozeki, Kiyoshi Shimamura, Nobuhiko Sarukura, T. Fukuda, Zhenlin Liu
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 7:542-550
To develop high-peak-power ultrashort pulse laser systems in the ultraviolet region, a large Ce/sup 3+/:LiCaAlF/sub 6/ (Ce:LiCAF) crystal, a tunable ultraviolet laser medium with large saturation fluence and broad gain spectrum width, was grown succe
Autor:
Hideyuki Ohtake, Hiroshi Takahashi, Hidetoshi Murakami, Nobuhiko Sarukura, Kazuo Watanabe, Shingo Ono, Gen Nishijima, Yuji Suzuki, Takayuki Yano
Publikováno v:
Applied Physics Letters. 82:1164-1166
We report on the terahertz radiation from femtosecond-laser-irradiated indium arsenide in high magnetic fields up to 14 T. It is found that the radiation power exhibits anomalous magnetic-field dependence, including saturation, decrease, and recovery
Publikováno v:
2012 IEEE 25th International Conference on Micro Electro Mechanical Systems (MEMS).
We have developed a versatile optimal control scheme for efficient suppression of high-speed temperature variation in micro devices. Surface heat flux applied with a thin-film heater is employed as the control input. Our proposed scheme employs adjoi
Autor:
Masahiro Sakai, Terunobu Nakajyo, H. Ohtake, Fumio Sakai, T. Fukuda, Nobuhiko Sarukura, Yuji Suzuki, Kiyoshi Shimamura, Yasushi Aoki, Toshimasa Kozeki
Publikováno v:
Applied Physics B. 74:s185-s187
In this experiment, we performed ultrafast spectroscopy on an electron-beam-excited Ce3+:LiCaAlF6 (Ce:LiCAF) crystal. The time-resolved fluorescence spectrum and lifetime with e-beam pumping differ significantly from those in the optically pumped cas
Autor:
Yuji Suzuki, Yasushi Aoki, Hideyuki Ohtake, Terunobu Nakajyo, Toshimasa Kozeki, Hidetoshi Murakami, Nobuhiko Sarukura, Fumio Sakai, Shingo Ono
Publikováno v:
Applied Physics Letters. 80:3280-3282
Hybrid time-resolved spectroscopy of laser media comparing electron-beam excitation and optically excited cases is performed using a newly developed, table-top-sized, low-jitter, 3-MeV picosecond electron-beam source with a photocathode. The properti
Autor:
Yuji Suzuki, Satoru Ito
Publikováno v:
ASME/JSME 2011 8th Thermal Engineering Joint Conference.
Optimal control scheme for transient temperature profile inside electronic devices such as pulsed laser diode is developed based on the adjoint equation of one-dimensional heat conduction. Joule heating with a thin-film heater is employed as the cont