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An Ultra-Compact CPO Transceiver based on 1060-nm Single-Mode VCSEL Array and Multi-Core Fibre
Tomonori Azuma;Kazuya Nagashima;Liang Dong;Wataru Yoshida;Yoshihiro Harada;Kensho Nishizaki;Makoto Miyoshi;Xiaodong Gu;Takatoshi Yagisawa;Hideyuki Nasu;Fumio Koyama
ECOC 2024; 50th European Conference on Optical Communication
Year: 2024 | Conference Paper |
We propose an ultra-compact CPO transceiver based on 1060-nm coupled-cavity single-mode VCSEL array and single-mode MCF, with double-sided FC-bonding and direct MCF butt-coupling. The fabricated 25-Gb/s × 16-channel CPO is as small as < 1 cm3. We demonstrate 2-km optical transmission covering inside of data-centres.Show More
Anomaly Detection and Factor Estimation Using Graph Neural Network with Storage Battery
2024 13th International Conference on Renewable Energy Research and Applications (ICRERA)
Year: 2024 | Conference Paper |
Predictive maintenance is a technique to conserve maintenance before failure by finding their indications in advance and it is the key effective maintenance operations and reduced downtime. Methods for predictive maintenance based on anomaly detection of sensors using deep learning have been actively studied, but the identification of anomalous sensors remains a challenging task. As sensors corres...Show More
An Ultra-Compact 106-Gb/s PAM4 × 8-Channel Linear-Drive VCSEL-Based Transceiver for Co-Packaged Optics
Wataru Yoshida;Kazuya Nagashima;Kensho Nishizaki;Sho Yoneyama;Hideyuki Nasu
2024 IEEE CPMT Symposium Japan (ICSJ)
Year: 2024 | Conference Paper |
We report a design and optical link characteristics of an ultra-compact 106-Gb/s PAM4 × 8-channel linear-drive VCSEL-based transceiver for Co-Packaged Optics. This optical transceiver employs the record narrowest 0.3-mm-pitch LGA for the electrical interface. To expand the bandwidth, we use a core-less building-up multi-layer organic substrate to avoid impedance mismatch of the vias in the core la...Show More
Over 25-GHz Bandwidth Testing Station Using a 0.3-mm-Pitch LGA Interface for a 50-Gbaud × 16-Channel CPO Transceiver
Kensho Nishizaki;Kazuya Nagashima;Wataru Yoshida;Sho Yoneyama;Hideyuki Nasu
We report a design and characteristics of an electrical pluggable interface and a testing station for a 50- Gbaud x 16-channel CPO transceiver using a 0.3-mm-pitch LGA interface. This testing station has a 3-dB bandwidth of 27.1 GHz at the longest differential transmission line, which is sufficient for 50-Gbaud signal transmission. We also build an optical link employing a 53-Gbaud x 8-channel opt...Show More
Temperature Distribution Measurement System for a Water-Cooled CPO Daughter Board
Hideyuki Nasu;Kensho Nishizaki;Kazuya Nagashima;Wataru Yoshida;Yuta Ishige;Takeshi Hirasawa
2023 IEEE CPMT Symposium Japan (ICSJ)
Year: 2023 | Conference Paper |
We build a thermal simulation model and a temperature distribution measurement system for a CPO daughter board which accommodates 32 ultra-compact optical transceivers. Our unique water-cooling system prevent providing the heat of switch ASIC to the optical transceivers. A targeted case temperature of $\leq \mathbf{40}{{}^{\circ}\mathbf{C}}$, in order to keep a VCSEL temperature of $\leq \mathbf{5...Show More
This paper describes the design and transmission characteristics of a bandwidth-expanded testing station using a 0.3-mm-pitch LGA-based electrical pluggable interface for a $\mathbf{25}- \mathbf{Gbaud} \times \mathbf{16}-\mathbf{channel}$ optical transceiver. This testing station employs a core-less building-up multi-layer organic substrate to avoid impedance mismatch at the vias in a core layer. ...Show More
We evaluate an optical link employing an ultra-compact 850-nm MM VCSEL-based 56-Gb/s $\mathbf{PAM}\mathbf{4} \times \mathbf{8}-\mathbf{channel}$ optical transceiver and three different kinds of MMFs (i.e., OM3, OM4, and OM5 fibers). We particularly analyze jitter margin characteristics for serial and 8-channel parallel signal transmissions. TDECQ values are also measured for optical eye diagrams t...Show More
We report the designs and characteristics of electrical pluggable interface using a 0.3-mm-pitch LGA for a 25-Gbaud x 16-channel CPO transceiver and a testing station using the electrical pluggable interface. The testing station has a TEC-integrated temperature control unit attached to the bottom of test board. Differential transmission lines for the test board were designed with the aid of electr...Show More
We report the design and transmission characteristics of 56-Gb/s PAM4 × 8-channel VCSEL-based optical transceiver for Co-Packaged Optics and 400-Gb/s QSFP-DD AOCs. This optical transceiver employs the world smallest 0.3-mm pitch LGA for the electrical interface. When operating the module by a bit stream of 56-Gb/s PAM4 PRBS-13Q in a loopback link system, we observed that the BER is less than the K...Show More
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