Search Results - "Tokushima, Masatoshi"

A 300-mm Silicon Photonics Platform for Large-Scale Device Integration by Horikawa, Tsuyoshi, Shimura, Daisuke, Okayama, Hideaki, Seok-Hwan Jeong, Takahashi, Hiroyuki, Ushida, Jun, Sobu, Yohei, Shiina, Akemi, Tokushima, Masatoshi, Kinoshita, Keizo, Mogami, Tohru

“…A 300-mm silicon photonics platform for large-scale device integration was developed, leveraging 40-nm complementary metal-oxide-semiconductor technology…”
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Lightwave propagation through a 120° sharply bent single-line-defect photonic crystal waveguide by Tokushima, Masatoshi, Kosaka, Hideo, Tomita, Akihisa, Yamada, Hirohito

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1.2 Tbps/cm2 Enabling Silicon Photonics IC Technology Based on 40-nm Generation Platform by Mogami, Tohru, Ukita, Akio, Takemura, Koichi, Kurihara, Mitsuru, Yashiki, Kenichiro, Okamoto, Daisuke, Suzuki, Yasuyuki, Sobu, Yohei, Jeong, Seok-Hwan, Tanaka, Yu, Nakamura, Takahiro, Horikawa, Tsuyoshi, Kurata, Kazuhiko, Kinoshita, Keizo, Hagihara, Yasuhiko, Ushida, Jun, Tokushima, Masatoshi, Fujikata, Junichi, Takahashi, Shigeki, Shimizu, Takanori

“…Optical transmitter and receiver ICs, each with a footprint of 25 mm 2 , were fabricated using a silicon photonics platform based on 40-nm-node CMOS…”
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The impacts of fabrication error in Si wire-waveguides on spectral variation of coupled resonator optical waveguides by Horikawa, Tsuyoshi, Shimura, Daisuke, Jeong, Seok-Hwan, Tokushima, Masatoshi, Kinoshita, Keizo, Mogami, Tohru

“…We experimentally investigate the impacts of fabrication error in Si wire-waveguides on the spectral variation of 5th-order coupled resonator optical…”
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Optical loss analysis and parameter optimization for fan-shaped single-polarization grating coupler at wavelength of 1.3 µm band by Ushida, Jun, Tokushima, Masatoshi, Sobu, Yohei, Shimura, Daisuke, Yashiki, Kenichiro, Takahashi, Shigeki, Kurata, Kazuhiko

“…Fan-shaped grating couplers (F-GCs) can be smaller than straight ones but are less efficient in general in coupling to single-mode fibers. To find a small F-GC…”
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Double-stage guided-mode converter for pure TM-mode guiding in pillar photonic-crystal waveguide devices by Tokushima, Masatoshi, Arakawa, Yasuhiko

“…We propose a double-stage guided-mode converter for pillar photonic-crystal (PhC) waveguide devices. The converter consists of a pillar-to-wire waveguide…”
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Observation of micromechanically controlled tuning of photonic crystal line-defect waveguide by Iwamoto, Satoshi, Ishida, Satomi, Arakawa, Yasuhiko, Tokushima, Masatoshi, Gomyo, Akiko, Yamada, Hirohito, Higo, Akio, Toshiyoshi, Hiroshi, Fujita, Hiroyuki

“…We fabricated a photonic crystal (PC) line-defect waveguide integrated with a microelectromechanical actuator and demonstrated the optical switching operation…”
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Anti-phase reflection coating maximizing the directionality of grating couplers by Tokushima, Masatoshi, Ushida, Jun

“…We present numerical demonstrations that anti-phase reflection coatings (APRCs) on the core layers of grating couplers (GCs) return anti-phase field into the…”
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Systematic design of antireflection coating for semi-infinite one-dimensional photonic crystals using Bloch wave expansion by Ushida, Jun, Tokushima, Masatoshi, Shirane, Masayuki, Yamada, Hirohito

“…We present a systematic method for designing a perfect antireflection coating (ARC) for a semi-infinite one-dimensional (1D) photonic crystal (PC) with an…”
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Understanding Inter-Arm Imbalance in Mach-Zehnder Silicon Optical Modulators: Impact on OMA and Frequency Chirp by Murao, Tadashi, Ushida, Jun, Takahashi, Hiroyuki, Tokushima, Masatoshi, Shiina, Akemi, Horikawa, Tsuyoshi

“…Characteristic variations caused by nonuniformities in the fabrication process are inevitable in Mach-Zehnder (MZ) silicon optical modulators. However, it is…”
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Post-Integrated Dual-Core Large-End Spot-Size Converter With Si Vertical Taper for Fiber Butt-Coupling to Si-Photonics Chip by Tokushima, Masatoshi, Kawashima, Hitoshi, Horikawa, Tsuyoshi, Kurata, Kazuhiko

“…We experimentally demonstrated a post-integrated dual-core spot-size converter (SSC) that had a coupling end with a 10-μm diameter at the edge of an…”
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Folded Shallow Grating Couplers With Minimal Back Reflection and Extended Coupling Bandwidth for Robust Coupling to Multimode Fibers by Tokushima, Masatoshi, Ushida, Jun, Kurata, Kazuhiko

“…Grating couplers (GCs) applicable to isolator-free transceiver (TX) chips are desired. In this paper, we numerically and experimentally demonstrate that folded…”
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Compact behavioral model and parametric extraction for optical phase shifters in carrier-depletion Mach–Zehnder silicon modulators by Murao, Tadashi, Ushida, Jun, Takahashi, Hiroyuki, Tokushima, Masatoshi, Shiina, Akemi, Horikawa, Tsuyoshi

“…Testing of active photonic devices is totally different from testing of pure electronics; in particular, reduction of testing time in silicon photonics has…”
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Prospect of chip scale silicon photonics transceiver for high density multi-mode wiring system by Kurata, Kazuhiko, Suzuki, Yasuyuki, Kurihara, Mitsuru, Tokushima, Masatoshi, Hagihara, Yasuhiko, Ogura, Ichiro, Nakamura, Takahiro

“…We propose high density multi-mode wiring system with chip scale silicon photonics transceiver. After review of concept and a discussion of overall design…”
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Spectral variation analysis for silicon grating couplers fabricated on a 300-mm SOI wafer by Horikawa, Tsuyoshi, Shimura, Daisuke, Ushida, Jun, Sobu, Yohei, Shiina, Akemi, Tokushima, Masatoshi, Seok-Hwan Jeong, Kinoshita, Keizo, Mogami, Tohru

“…Spectral variation behavior for many grating couplers is experimentally investigated. It was found that the coupling wavelength is shifted by fabrication…”
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Triple-Exposure Method for Fabricating Triangular-Lattice Photonic Crystals by Tokushima, Masatoshi, Kosaka, Hideo, Tomita, Akihisa, Yamada, Hirohito

“…We have developed a triple-exposure method for defining a triangular-lattice pattern to form two-dimensional (2D) photonic-crystal (PC) waveguides operating at…”
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Process control and monitoring in device fabrication for optical interconnection using silicon photonics technology by Horikawa, Tsuyoshi, Shimura, Daisuke, Seok-Hwan Jeong, Tokushima, Masatoshi, Kinoshita, Keizo, Mogami, Tohru

“…Precise dimension control technology for the fabrication of silicon photonics devices was established. The dimension control technology is based on the devices…”
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1.2 Tbps/cm 2 Enabling Silicon Photonics IC Technology Based on 40-nm Generation Platform by Mogami, Tohru, Ukita, Akio, Takemura, Koichi, Kurihara, Mitsuru, Yashiki, Kenichiro, Okamoto, Daisuke, Suzuki, Yasuyuki, Sobu, Yohei, Jeong, Seok-Hwan, Tanaka, Yu, Nakamura, Takahiro, Horikawa, Tsuyoshi, Kurata, Kazuhiko, Kinoshita, Keizo, Hagihara, Yasuhiko, Ushida, Jun, Tokushima, Masatoshi, Fujikata, Junichi, Takahashi, Shigeki, Shimizu, Takanori

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A 25-Gb/s 5 × 5 mm2 Chip-Scale Silicon-Photonic Receiver Integrated With 28-nm CMOS Transimpedance Amplifier by Okamoto, Daisuke, Suzuki, Yasuyuki, Yashiki, Kenichiro, Hagihara, Yasuhiko, Tokushima, Masatoshi, Fujikata, Junichi, Kurihara, Mitsuru, Tsuchida, Junichi, Nedachi, Takaaki, Inasaka, Jun, Kurata, Kazuhiko

“…We have developed a 5 × 5 mm 2 compact silicon-photonic receiver with a 28-nm CMOS transimpedance-amplifier (TIA) chip. The receiver chip was designed using a…”
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A 25-Gb/s 5 × 5 mm 2 Chip-Scale Silicon-Photonic Receiver Integrated With 28-nm CMOS Transimpedance Amplifier by Okamoto, Daisuke, Suzuki, Yasuyuki, Yashiki, Kenichiro, Hagihara, Yasuhiko, Tokushima, Masatoshi, Fujikata, Junichi, Kurihara, Mitsuru, Tsuchida, Junichi, Nedachi, Takaaki, Inasaka, Jun, Kurata, Kazuhiko

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