Search Results - "Iga, R."

Thickness modulation and strain relaxation in strain-compensated InGaP/InGaP multiple-quantum-well structure grown by metalorganic molecular beam epitaxy on GaAs (100) substrate by Mitsuhara, M., Watanabe, N., Yokoyama, H., Iga, R., Shigekawa, N.

“…We have investigated the structural features of a strain-compensated InGaP/InGaP multiple-quantum-well (MQW) structure on GaAs (100) substrate with a band-gap…”
Get full text

A 40-gb/s InGaAlAs-InAlAs MQW n-i-n Mach-Zehnder Modulator with a drive Voltage of 2.3 V by Tsuzuki, Ken, Ishibashi, Tadao, Ito, Tsuyoshi, Oku, Satoshi, Shibata, Yasuo, Ito, Toshio, Iga, Ryuzo, Kondo, Yasuhiro, Tohmori, Yuichi

“…We have developed a traveling-wave Mach-Zehnder modulator using an n-i-n heterostructure fabricated on an InP substrate. We obtained an extremely small /spl…”
Get full text

Analysis of Wear-Out Degradation of a DFB Laser Using an Optical-Beam-Induced Current Monitor by Takeshita, T., Yamamoto, M., Iga, R., Sugo, M., Kondo, Y., Kato, K.

“…We investigated the degradation behavior of distributed feedback lasers by employing the optical-beam-induced current measurement technique. We showed that the…”
Get full text

1.3- \mu m 4 \,\times\, 25-Gb/s Monolithically Integrated Light Source for Metro Area 100-Gb/s Ethernet by Fujisawa, T, Kanazawa, S, Ishii, H, Nunoya, N, Kawaguchi, Y, Ohki, A, Fujiwara, N, Takahata, K, Iga, R, Kano, F, Oohashi, H

“…A 1.3- monolithically integrated light source for metro area 100-Gb/s Ethernet is developed. Four 25-Gb/s electroabsorption modulators integrated with…”
Get full text

Single transverse mode operation of 1.55-μm buried heterostructure vertical-cavity surface-emitting lasers by Ohiso, Y., Okamoto, H., Iga, R., Kishi, K., Amano, C.

“…We report the single-mode operation of 1.55-μm buried heterostructure vertical-cavity surface-emitting lasers (VCSELs) fabricated on a GaAs-AlAs distributed…”
Get full text

Lossless electroabsorption modulator monolithically integrated with a semiconductor optical amplifier and a passive waveguide by Asaka, K., Suzaki, Y., Kawaguchi, Y., Kondo, S., Noguchi, Y., Okamoto, H., Iga, R., Oku, S.

“…We have developed a monolithic integrated device consisting of an electroabsorption modulator and a semiconductor optical amplifier (SOA) connected by a…”
Get full text

Monolithically integrated eight-channel WDM modulator with narrow channel spacing and high throughput by Suzaki, Y., Yasaka, H., Mawatari, H., Yoshino, K., Kawaguchi, Y., Oku, S., Iga, R., Okamoto, H.

“…We demonstrate an eight-channel wavelength division multiplexing (WDM) modulator module that monolithically integrates arrayed waveguide gratings and…”
Get full text

Level Shifter Architecture for Dynamically Biasing Ultra-Low Voltage Subcircuits of Integrated Systems by Iga Jadue, A. R., Bastos, R. Possamai, de Paiva Leite, T. Ferreira, Rolloff, O. A., Diallo, M., Fesquet, L.

“…Dynamically scaling down the voltage of integrated systems is an effective technique for enabling low-power operation modes. The system is partitioned into…”
Get full text

Compact and stable electroabsorption optical modulator modules by Yoshino, K., Takeshita, T., Kotaka, I., Kondo, S., Noguchi, Y., Iga, R., Wakita, K.

“…Very compact electroabsorption optical modulator modules that demonstrate high coupling efficiency and high stability have been developed. The modules show…”
Get full text

Low-voltage operation of 100-Gbit/s EADFB laser array module by Kanazawa, S, Fujisawa, T, Ohki, A, Ishii, H, Nunoya, N, Kawaguchi, Y, Fujiwara, N, Takahata, K, Iga, R, Kano, F, Oohashi, H

“…We developed a 4×25.8-Gbit/s EADFB laser array module for use as a 100-Gbit/s Ethernet transceiver. We demonstrated error-free transmission over a 10-km…”
Get full text

Fabrication and performance of AlGaAs-GaAs distributed Bragg reflector lasers and distributed feedback lasers utilizing first-order diffraction gratings formed by a periodic groove structure by Oku, S., Ishii, T., Iga, R., Hirono, T.

“…Distributed Bragg reflector (DBR) lasers and distributed feedback (DFB) lasers utilizing diffraction grating formed by deeply etched periodic grooves were…”
Get full text

High performance of 1.55-μm buried-heterostructure vertical-cavity surface-emitting lasers by Ohiso, Y., Okamoto, H., Iga, R., Kishi, K., Tateno, K., Amano, C.

“…We report a record low threshold current of 1.55-μm vertical-cavity surface-emitting laser (VCSEL). Thin-film wafer-fusion technology enables InP-based buried…”
Get full text

Novel adjustment structure and method for InP-based Mach-Zehnder interferometer polarization splitter by Watanabe, K., Nasu, Y., Ohiso, Y., Iga, R.

“…We propose a novel structure for an InP-based polarization beam splitter/combiner by employing phase shifters which allow us to adjust the properties of the TE…”
Get full text

1.55-μm buried-heterostructure VCSELs with InGaAsP/lnP-GaAs/AlAs DBRs on a GaAs substrate by Ohiso, Y., Okamoto, H., Iga, R., Kishi, K., Tateno, K., Amano, C.

“…We demonstrate 1.55- mu m buried-heterostructure (BH) vertical-cavity surface-emitting lasers (VCSELs) on a GaAs substrate. Thin-film wafer-fusion technology…”
Get full text

Ultra-Compact 100 GbE Transmitter Optical Sub-Assembly for 40-km SMF Transmission by Kanazawa, S., Fujisawa, T., Nunoya, N., Ohki, A., Takahata, K., Sanjoh, H., Iga, R., Ishii, H.

“…The first ultra-compact transmitter optical sub-assembly (TOSA) has been developed for the metro-area 100 Gbit/s Ethernet (100 GbE) system. Four DFB lasers…”
Get full text

Double-wavelength laser array with InGaAsP/InGaAsP multiple quantum well grown by Ar ion laser-assisted metalorganic molecular beam epitaxy by YAMADA, T, IGA, R, SUGIURA, H

“…This letter reports a laser diode array of InGaAsP/InGaAsP multiple quantum well (MQW) lasers, emitting at different wavelengths, grown by Ar ion laser…”
Get full text

Tunable Distributed Amplification (TDA-) DFB Laser with Asymmetric Structure by Nunoya, N., Ishii, H., Kawaguchi, Y., Iga, R., Sato, T., Fujiwara, N., Oohashi, H.

“…The wavelengths of tunable distributed amplification (TDA) distributed feedback (DFB) lasers consisting of multiple units including an active region and a…”
Get full text

A Compact EADFB Laser Array Module for a Future 100-Gb/s Ethernet Transceiver by Kanazawa, S., Fujisawa, T., Ohki, A., Ishii, H., Nunoya, N., Kawaguchi, Y., Fujiwara, N., Takahata, K., Iga, R., Kano, F., Oohashi, H.

“…A compact electroabsorption modulators integrated distributed feedback (EADFB) laser array module has been developed for 100-Gb/s Ethernet. Four 25-Gb/s EADFB…”
Get full text

Ammonium sulfide combined etching (ACE): an effective treatment for reducing impurities prior to MOVPE InP regrowth in a process using hydrocarbon gas reactive ion etching (RIE) by Yamamoto, N, Kishi, K, Kondo, Y, Matsumoto, S, Iga, R, Kadota, Y, Okamoto, H, Mawatari, H

“…Ammonium sulfide combined etching (ACE) is a treatment carried out prior to metalorganic vapor phase epitaxy (MOVPE) regrowth of InP on a surface processed by…”
Get full text

Carbon reduction in GaAs films grown by laser-assisted metalorganic molecular beam epitaxy by IGA, R, SUGIURA, H, YAMADA, T, WADA, K

“…Secondary-ion mass spectroscopy and cathodoluminescence (CL) studies were carried out on GaAs films grown by Ar+ laser-assisted metalorganic molecular beam…”
Get full text