Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Masahiro Kume"'
Publikováno v:
Optical Technology and Measurement for Industrial Applications Conference 2021.
The optical-based super-resolution, non-invasive method is preferred for the inspection of surfaces with massive microstructures widely applied in functional surfaces. The Structured Illumination Microscopy (SIM) uses standing-wave illumination to re
Autor:
N. Otsuka, A. Tsujimura, I. Kidoguchi, Satoshi Kamiyama, Ryoko Miyanaga, Y. Ban, Masakatsu Suzuki, Yoshiteru Hasegawa, Masahiro Kume, Akihiko Ishibashi, Kenji Harafuji, G. Sugahara
Publikováno v:
physica status solidi (a). 176:53-57
Publikováno v:
IEEE Journal of Quantum Electronics. 29:1889-1894
A very-high-power, single-mode GaAlAs triple-quantum-well (TQW) laser with a novel real refractive index guided structure has been developed. The maximum output power of 720 mW CW and single transverse- and longitudinal-mode operation up to 600 mW CW
Publikováno v:
Applied optics. 32(33)
Very-low-noise operation (as low as -140 dB/Hz) of close-coupled Nd:YVO(4) lasers is reported. This low noise level has been attained by controlling the spectra of the pumping laser diodes into the single longitudinal mode by suppressing mode hopping
Publikováno v:
IEEE Journal of Quantum Electronics. 28:1164-1168
The authors demonstrate noise reduction which has been attained in a diode-pumped intracavity-doubled Nd:YAG laser by using a novel birefringent filter formed by a Brewster plate and a birefringent KTP crystal. It is confirmed that single longitudina
Autor:
Masaru Kazumura, Hiroki Naito, Jun Ohya, Hirokazu Shimizu, Masahiro Kume, Issey Ohta, Iwao Teramoto
Publikováno v:
Solid-State Electronics. 34:1329-1333
This paper describes successful development of a high-power short-pulse i.r. laser diode, together with numerical analyses giving a clear understanding of the operation. The novel aspect of the present laser diode is that a saturable absorber is inco
Autor:
K. Hamada, Masahiro Kume, H. Naito, K. Tateoka, Masaaki Yuri, M. Kazumura, I. Teramoto, H. Shimizu
Publikováno v:
IEEE Journal of Quantum Electronics. 27:1568-1573
A novel high-power GaAlAs superluminescent diode (SLD) structure that introduces an antireflective (AR) window region into the rear side of the SLD is proposed. The light beam which travels backward is emitted from the edge of the active layer and di
Publikováno v:
IEEE Journal of Quantum Electronics. 27:1550-1554
The reliability of high-power single-mode GaAlAs lasers with nonabsorbing mirrors (NAMs) was investigated in detail. The lasers were tested at various output powers and temperatures. The aging test was performed under constant power in order to exami
Publikováno v:
IEEE Journal of Quantum Electronics. 27:2050-2059
Picosecond pulse generation of blue light by frequency doubling of a GaAlAs laser diode is reported. High power pulse generation is realized by incorporating gain switching of a laser diode with a saturable absorber and frequency doubling in a proton
Publikováno v:
The Review of Laser Engineering. 18:569-572
We succeeded in the phase locked operation of a 5-element GaAIAs diode laser array emitting 0.6W CW. The diodes use nonabsorbing mirrors (NAM's) for the suppression of catastrophic optical damage (COD) and a buried twin ridge substrate (BTRS) structu