Search Results - "Shigihara, Kimio"

Suppression of Lasing Wavelength Change of 980 nm Pump Laser Diodes for Metro Applications by Kawasaki, Kazushige, Shigihara, Kimio, Matsuoka, Hiromasu, Kunitsugu, Yasuhiro, Yamamura, Shin'ichi, Yagi, Tetsuya, Omura, Etsuji, Mitsui, Yasuo

“…High-power 980 nm laser diodes (LDs) are used as pumping sources of erbium-doped fiber amplifiers (EDFAs). Reductions of costs and power consumption in EDFAs…”
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Anomalous wavelength changes of 980-nm pump laser diodes with antireflection coatings by Shigihara, K., Kawasaki, K., Yagi, T., Omura, E.

“…We have observed abrupt wavelength jumps form 980-nm pump laser diodes with an antireflection (AR) coating when the injection currents were changed. The width…”
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High-power and highly reliable 1020-nm ridge waveguide laser diodes with small aspect ratio as a pumping source for praseodymium-doped fiber amplifiers by Shigihara, K., Kawasaki, K., Yamamura, S., Takemoto, A., Yagi, T., Mitsui, Y.

“…The structure of an asymmetrically expanded optical field normal to the active layer was applied to 1020-nm ridge waveguide laser diodes in order to increase…”
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High-power 980-nm ridge waveguide laser diodes including an asymmetrically expanded optical field normal to the active layer by Shigihara, K.I., Kawasaki, K., Yoshida, Y., Yamamura, S., Yagi, T., Omura, E.

“…We propose a new ridge waveguide laser diode (LD) which supports an asymmetrically expanded optical field normal to the active layer in order to increase the…”
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Laser diodes in photon number squeezed state by Kakimoto, S., Shigihara, K., Nagai, Y.

“…A laser diode with an intrinsic layer as the space charge limited current region is expected to emit a low noise (less than the shot noise level) light…”
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Achieving broad-area laser diodes with high output power and single-lobed far-field patterns in the lateral direction by loading a modal reflector by Shigihara, K., Nagai, Y., Kakimoto, S., Ikeda, K.

“…A modal reflector, which consists of a high-reflectivity region surrounded by low-reflectivity regions, is added to the front facet of two types of broad-area…”
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0.78- and 0.98-μm ridge-waveguide lasers buried with AlGaAs confinement layer selectively grown by chloride-assisted MOCVD by Shima, A., Kizuki, H., Takemoto, A., Karakida, S., Miyashita, M., Nagai, Y., Kamizato, T., Shigihara, K., Adachi, A., Omura, E., Otsubo, M.

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High-power operation of broad-area laser diodes with GaAs and AlGaAs single quantum wells for Nd:YAG laser pumping by Shigihara, K., Nagai, Y., Karakida, S., Takami, A., Kokubo, Y., Matsubara, H., Kakimoto, S.

“…The dependencies of the main lasing characteristics on the facet reflectivity for GaAs and AlGaAs single-quantum-well (SQW) separate-confinement…”
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High-power operation of AlGaAs SQW-SCH broad-area laser diodes for Nd:YAG solid-state laser pumping by Nagai, Y., Shigihara, K., Takami, A., Karakida, S., Kokubo, Y., Tada, A.

“…AlGaAs single-quantum-well separate-confinement-heterostructure (SQW-SCH) single-stripe broad-area laser diodes (LDs) for Nd:YAG solid-state laser pumping were…”
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New High Power Ridge-Waveguide 980 nm Laser Diodes With Window Structure by Kawasaki, K., Shigihara, K., Yoshida, Y., Yamamura, S., Yagi, T., Mitsui, Y.

“…We report on a COD(Catastrophic Optical Damage) free 980nm-laser-diode with a window structure, which supports of asymmetrically expanded optical field normal…”
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Suppression of lasing wavelength change of 980 nm pump laser diodes by means of decreasing facet reflectivity as lengthening wavelength by Shigihara, K., Kawasaki, K., Matsuoka, H., Kunitsugu, Y., Yamamura, S., Yagi, T., Oomura, E., Mitsui, Y.

“…We have proposed a new method of suppressing the lasing-wavelength-change by means of decreasing facet reflectivity as increasing wavelength. Less than…”
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