Shogo Yamanaka

Analyses of BER-referred noise-to-signal ratio in online measurements of high-baud-rate coherent receivers

Toshihiro Itoh, Kentaro Honda, Yuichiro Ikuma, Yuriko Kawamura et autres

Digital coherent transmission features a very large transmission bandwidth and has played a main role in core optical transmission networks. With the progress of semiconductor technologies, practical coherent transceivers with rates over 100 Gbaud are becoming feasible. With such advances, the transceiver …

Recent advances in integrated silicon photonics engine for coherent optical communications

Shogo Yamanaka

Silicon photonics (SiPh) are promising technologies for digital coherent optical communications because they can monolithically integrate all optical functions except for a laser, namely, modulators, mixers, photodiodes, a polarization beam splitter/combiner, and rotator, onto a single chip. We developed SiPh-based coherent optical …

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An Over 67-GHz Bandwidth 21-dB Gain 4.5-Vppd Linear Modulator Driver for 100-GBd Coherent Optical Transmitter

Teruo Jyo, Munehiko Nagatani, Yoshihiro Ogiso, Shogo Yamanaka et autres

A linear driver for 100-GBd optical transmitters was designed and fabricated in the 90-nm SiGe BiCMOS process. An output-swing-limiting circuit and multitopology peaking method are proposed to extend the bandwidth. The fabricated driver achieved a differential gain of 21 dB with a …

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Silicon Photonics Coherent Optical Subassembly for High-Data-Rate Signal Transmissions

Shogo Yamanaka, Yusuke Nasu

We present silicon photonics coherent optical subassemblies for digital coherent optical systems. We also demonstrate up to 96-Gbaud 16QAM transmission experiments.

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Ultracompact Silicon Photonics Coherent Optical Subassembly for Ultrahigh-capacity Optical Communication

Yusuke Nasu, Shogo Yamanaka

Toward the All-Photonics Network, which is a key element of the Innovative Optical and Wireless Network (IOWN), we at NTT Device Innovation Center are developing an ultracompact optical transceiver module as a photonics-electronics convergence device.By using silicon photonics technology and co-packaging electronic …

Silicon-photonics-based coherent optical subassembly (COSA) for ultra-compact coherent transceiver

Kiyofumi Kikuchi, Ken Tsuzuki, Shin Kamei, Shogo Yamanaka et autres

We actualized a silicon photonics (SiPh)-based coherent optical subassembly (COSA) with a compact and low-height package for the next-generation transceiver form factors. We integrated optical functions required for transmitting and receiving digital coherent optical signals into a single SiPh chip. The COSA …

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超小型コヒーレント送受信機のためのシリコン-フォトニクス型コヒーレント光サブアセンブリ(COSA)【Powered by NICT】

Kikuchi Kiyofumi, Tsuzuki Ken, Kamei Shin, Shogo Yamanaka et autres

An InP-Based 27-GHz-Bandwidth Limiting TIA IC Designed to Suppress Undershoot and Ringing in Its Output Waveform

Hiroyuki Fukuyama, Michihiro Hirata, Kenji Kurishima, Minoru Ida et autres

A design scheme for a high-speed differential-input limiting transimpedance amplifier (TIA) was developed. The output-stage amplifier of the TIA is investigated in detail in order to suppress undershoot and ringing in the output waveform. The amplifier also includes a peak detector for …

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Compact Low-Power Optical/Electrical Devices Enabling Pluggable Coherent Transceivers for Datacom

Shogo Yamanaka, H. Onaka, Osamu Ishida

We devised low-power digital signal processing LSI and compact optical modulators and receivers for 100 Gb/s coherent CFP (100G Form-factor Pluggable) transceivers. We demonstrated error-free operation in an up to 840-km SMF link with one-third the power consumption compared with a conventional …

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C-10-5 4ch集積ドライバモジュールにおけるコイルレス化による小型化検討(C-10,電子デバイス,一般セッション)

Hitoshi Wakita, Munehiko Nagatani, Shogo Yamanaka, Hiromasa Tanobe et autres

Ultra-compact quad-channel 28-Gbaud linear driver module for InP Mach-Zehnder modulator

Hitoshi Wakita, Munehiko Nagatani, Shogo Yamanaka, Hiromasa Tanobe et autres

In this paper, a small quad-driver module for InP Mach-Zehnder modulators is presented. To decrease the size of the module, we integrated two channels for the driver IC while improving cross-channel isolation. The driver IC requires no external bias tee. A quad-channel …

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Ultra-compact coherent receiver with serial interface for pluggable transceiver

Toshihiro Itoh, Fumito Nakajima, Tetsuichiro Ohno, Shogo Yamanaka et autres

An ultra-compact integrated coherent receiver with a volume of 1.3 cc using a quad-channel transimpedance amplifier (TIA)-IC chip with a serial peripheral interface (SPI) is demonstrated for the first time. The TIA with the SPI and photodiode (PD) bias circuits, a miniature …

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