Geunhaeng Lee - IEEE Xplore Author Profile

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Author details

Geunhaeng Lee

Publications

14

Citations

158

Publications by Year

20162025

Co-Authors:

Chiyoung AhnSeungyong BaeYoungsea ChoJongpil ChoJieun Han

Show All Co-Authors (44)

Geunhaeng Lee

Affiliation

Department of Information and Telecommunication Engineering

Incheon National University

Incheon, Republic of Korea

Publication Topics

Capacitive Coupling,
Carrier Frequency,
Global Positioning System,
Internet Of Things,
Low-noise Amplifier,
Power Consumption,
Pulse Repetition Frequency,
Received Signal Strength Indicator,
Sidelobe,
Accuracy Error,
Analog-to-digital Converter,
Approximation Theory

Biography

Geunhaeng Lee received the B.S. degree in electronic and electrical engineering from Dankook University, Kyung-Ki, Republic of Korea, in 2014, and the Ph.D. degree in electrical and electronic engineering from Yonsei University, Seoul, Republic of Korea, in 2021.,He was a Staff Engineer with the System LSI Business, Samsung Electronics, Hwaseong, Republic of Korea, from 2021 to 2023, where he was involved with the design of UWB RF transceiver (IEEE 802.15.4z). Since March 2023, he has been with the Department of Electronic Engineering, Andong National University, Andong-si, Republic of Korea, as an Assistant Professor. His research interests are RF amplifiers, including PA and LNA, mixed-signal circuits, and circuit and system for wireless ...

Publications

14

Citations

158

Publications by Year

20162025

Co-Authors:

Chiyoung Ahn
Seungyong Bae
Youngsea Cho
Jongpil Cho
Jieun Han

Show All Co-Authors (44)

Author's Published Works

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Showing 1-25 of 32 results

Conferences (25)

Journals (7)

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Kazuya Nagashima(32)
Hideyuki Nasu(25)
Yozo Ishikawa(16)
Tomofumi Kise(10)
Wataru Yoshida(8)
FITEL Products Division, Furukawa Electric Co., Ltd., Ichihara, Chiba, Japan(4)
FITEL Products Division, Furukawa Electric Co., Ltd, Chiba, Japan(3)
NTT Device Innovation Center, NTT Corporation, Kanagawa, Japan(3)
Furukawa Denki Kogyo Kabushiki Kaisha, Chiyoda-ku, Tokyo, JP(2)
NTT Device Innovation Center, Nippon Telegraph and Telephone Corporation, Atsugi, Japan(2)
Journal of Lightwave Technology(4)
2016 IEEE CPMT Symposium Japan (ICSJ)(3)
2022 IEEE CPMT Symposium Japan (ICSJ)(3)
2023 IEEE CPMT Symposium Japan (ICSJ)(3)
IEEE Photonics Technology Letters(3)
IEEE(31)
VDE(1)
Kyoto, Japan(16)
San Francisco, CA, USA(2)
Anaheim, CA, USA(1)
Basel, Switzerland(1)
Cannes, France(1)
Optical Link(20)
Optical Modes(15)
Eye Diagrams(14)
Multimode Fiber(14)
Transimpedance Amplifier(14)

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Results

C+L-Band InP-Based Coherent Driver Modulator Enabled Net-1.8 Tbps/λ Transmission

Josuke Ozaki;Yoshihiro Ogiso;Hiroshi Yamazaki;Masanori Nakamura;Kenta Sugiura;Kazuya Nagashima;Yasuaki Hazhizume;Nobuhiro Nunoya;Yutaka Miyamoto;Mitsuteru Ishikawa

Journal of Lightwave Technology

Year: 2025 | Volume: 43, Issue: 4 | Journal Article |

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We developed the world's first InP-based C+L-band coherent driver modulator (CDM) that has a 3-dB electro-optic (EO) bandwidth of over 90 GHz. The CDM consisted of an InP-based n-i-p-n heterostructure twin IQ modulator chip with a differential capacitively loaded traveling-wave electrode, a SiGe BiCMOS driver in an open-collector configuration, and an RF package with a flexible printed circuit as ...Show More

C+L-Band InP-Based Coherent Driver Modulator Enabled Net-1.8 Tbps/λ Transmission

Josuke Ozaki;Yoshihiro Ogiso;Hiroshi Yamazaki;Masanori Nakamura;Kenta Sugiura;Kazuya Nagashima;Yasuaki Hazhizume;Nobuhiro Nunoya;Yutaka Miyamoto;Mitsuteru Ishikawa

Journal of Lightwave Technology

Year: 2025 | Volume: 43, Issue: 4 | Journal Article |

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

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 |

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 |

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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

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 |

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

2024 IEEE CPMT Symposium Japan (ICSJ)

Year: 2024 | Conference Paper |

Cited by: Papers (1)

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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

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

2024 IEEE CPMT Symposium Japan (ICSJ)

Year: 2024 | Conference Paper |

Net-1.8 Tbps/λ Transmission Enabled by C+L-band InP-based Coherent Driver Modulator

Josuke Ozaki;Yoshihiro Ogiso;Hiroshi Yamazaki;Masanori Nakamura;Kenta Sugiura;Kazuya Nagashima;Yasuaki Hashizume;Nobuhiro Nunoya;Yutaka Miyamoto;Mitsuteru Ishikawa

2024 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2024 | Conference Paper |

Cited by: Papers (1)

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Using a newly developed InP-based C+L-band supported coherent driver modulator with an electro-optic 3-dB bandwidth above 90 GHz, an 80km transmission with a net bit rate of 1.8Tbps/λ in the C+L band was successfully demonstrated.Show More

Net-1.8 Tbps/λ Transmission Enabled by C+L-band InP-based Coherent Driver Modulator

Josuke Ozaki;Yoshihiro Ogiso;Hiroshi Yamazaki;Masanori Nakamura;Kenta Sugiura;Kazuya Nagashima;Yasuaki Hashizume;Nobuhiro Nunoya;Yutaka Miyamoto;Mitsuteru Ishikawa

2024 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2024 | Conference Paper |

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 |

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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

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 |

Bandwidth Expansion of a Testing Station Using a 0.3-mm-Pitch LGA Interface for a $25\text{-Gbaud} \times 16- \text{Channel}$ CPO Transceiver

Kazuya Nagashima;Yuta Ishige;Wataru Yoshida;Hideyuki Nasu

2023 IEEE CPMT Symposium Japan (ICSJ)

Year: 2023 | Conference Paper |

Cited by: Papers (2)

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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

Bandwidth Expansion of a Testing Station Using a 0.3-mm-Pitch LGA Interface for a $25\text{-Gbaud} \times 16- \text{Channel}$ CPO Transceiver

Kazuya Nagashima;Yuta Ishige;Wataru Yoshida;Hideyuki Nasu

2023 IEEE CPMT Symposium Japan (ICSJ)

Year: 2023 | Conference Paper |

Jitter Margin Analysis of 56-Gb/s $\text{PAM}4\times 8-\text{Channel}$ VCSEL-Based Optical Transceiver for Co-Packaged Optics

Wataru Yoshida;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu

2023 IEEE CPMT Symposium Japan (ICSJ)

Year: 2023 | Conference Paper |

Cited by: Papers (1)

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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

Jitter Margin Analysis of 56-Gb/s $\text{PAM}4\times 8-\text{Channel}$ VCSEL-Based Optical Transceiver for Co-Packaged Optics

Wataru Yoshida;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu

2023 IEEE CPMT Symposium Japan (ICSJ)

Year: 2023 | Conference Paper |

Over-85-GHz-Bandwidth InP-Based Coherent Driver Modulator Capable of 1-Tb/s/λ-Class Operation

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Nobuhiro Nunoya;Mitsuteru Ishikawa

Journal of Lightwave Technology

Year: 2023 | Volume: 41, Issue: 11 | Journal Article |

Cited by: Papers (13)

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We developed an InP-based coherent driver modulator (CDM) with a flexible printed circuit (FPC) RF interface. The CDM has a 3-dB electro-optic (EO) bandwidth of over 85 GHz, including the evaluation board loss, which is sufficient for 1-Tb/s/λ-class operation. Furthermore, we obtained good back-to-back bit-error-rate (BER) performance in modulations up to 144-Gbaud dual-polarization 16-QAM, and we...Show More

Over-85-GHz-Bandwidth InP-Based Coherent Driver Modulator Capable of 1-Tb/s/λ-Class Operation

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Nobuhiro Nunoya;Mitsuteru Ishikawa

Journal of Lightwave Technology

Year: 2023 | Volume: 41, Issue: 11 | Journal Article |

Testing station using a 0.3-mm-pitch LGA interface for a 25-Gbaud x 16-channel CPO transceiver

Yuta Ishige;Kazuya Nagashima;Wataru Yoshida;Hideyuki Nasu

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

Cited by: Papers (7)

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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

Testing station using a 0.3-mm-pitch LGA interface for a 25-Gbaud x 16-channel CPO transceiver

Yuta Ishige;Kazuya Nagashima;Wataru Yoshida;Hideyuki Nasu

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

56-Gb/s PAM4 × 8-Channel VCSEL-Based Optical Transceiver for Co-Packaged Optics

Wataru Yoshida;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

Cited by: Papers (8)

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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

56-Gb/s PAM4 × 8-Channel VCSEL-Based Optical Transceiver for Co-Packaged Optics

Wataru Yoshida;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

Design of CPO Daughter Board with FPGA and 25-Gbaud × 16-Channel Ultra-Compact Optical Transceivers

Kei Takahashi;Kensuke Miura;Hikaru Nakajima;Satoru Torimitsu;Naoki Soya;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu;Shoji Fukutomi

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

Cited by: Papers (7)

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We design a CPO daughter board on which 32 ultra-compact transceivers are mounted with an FPGA. The high-speed differential transmission lines are designed with the aid of electro-magnetic simulations. Eye diagrams are simulated by high-speed circuit simulations. Measured 25-Gbaud NRZ eye diagrams have a good agreement with the simulated results. Electrical crosstalk was suppressed to −30 dB and l...Show More

Design of CPO Daughter Board with FPGA and 25-Gbaud × 16-Channel Ultra-Compact Optical Transceivers

Kei Takahashi;Kensuke Miura;Hikaru Nakajima;Satoru Torimitsu;Naoki Soya;Yuta Ishige;Kazuya Nagashima;Hideyuki Nasu;Shoji Fukutomi

2022 IEEE CPMT Symposium Japan (ICSJ)

Year: 2022 | Conference Paper |

Class-80 InP-based high-bandwidth coherent driver modulator with flexible printed circuit RF interface

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Mitsuteru Ishikawa

2022 European Conference on Optical Communication (ECOC)

Year: 2022 | Conference Paper |

Cited by: Papers (1)

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We developed flexible printed circuit RF interface InP-based coherent driver modulators with a 3-dB bandwidth of over 80 GHz for 128-Gbaud or higher operations. Low insertion loss (<8.5 dB per polarization), low polarization-dependent loss (<0.1 dB), and high extinction ratio (>30 dB) were achieved.Show More

Class-80 InP-based high-bandwidth coherent driver modulator with flexible printed circuit RF interface

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Mitsuteru Ishikawa

2022 European Conference on Optical Communication (ECOC)

Year: 2022 | Conference Paper |

Coherent Driver Modulator With Flexible Printed Circuit RF Interface for 128-Gbaud Operations

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Mitsuteru Ishikawa

IEEE Photonics Technology Letters

Year: 2022 | Volume: 34, Issue: 23 | Journal Article |

Cited by: Papers (4)

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We developed a flexible printed circuit (FPC) RF interface InP-based high-bandwidth coherent driver modulator (CDM) for 128-Gbaud class operations. To increase the bandwidth of the CDM, an FPC RF interface was introduced to the CDM package, which significantly improved the roll-off frequency by about 40 GHz compared with a conventional package with a surface-mount-type RF interface. The FPC packag...Show More

Coherent Driver Modulator With Flexible Printed Circuit RF Interface for 128-Gbaud Operations

Josuke Ozaki;Yoshihiro Ogiso;Yasuaki Hashizume;Hiroshi Yamazaki;Kazuya Nagashima;Mitsuteru Ishikawa

IEEE Photonics Technology Letters

Year: 2022 | Volume: 34, Issue: 23 | Journal Article |

Transmitter-Receiver Optical Sub Assembly using Ultra-Compact Tunable DBR/Ring Laser

Kazuya Nagashima;Yozo Ishikawa;Atsushi Izawa;Masayoshi Nishita;Noritaka Matsubara;Hiroyuki Ishii;Thanakit Saeyang;Yoshihiro Ogiso;Yuta Ueda;Masaki Kohtoku

2021 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2021 | Conference Paper |

Cited by: Papers (1)

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We demonstrate a tiny optical module which integrates an ultra-compact wavelength tunable laser, InP-based transmitter and PLC-based receiver. The optical module exhibits low-insertion loss (<13.6 dB) and high bandwidth (>45 GHz) for ≥400-Gb/s coherent-optical links.Show More

Transmitter-Receiver Optical Sub Assembly using Ultra-Compact Tunable DBR/Ring Laser

Kazuya Nagashima;Yozo Ishikawa;Atsushi Izawa;Masayoshi Nishita;Noritaka Matsubara;Hiroyuki Ishii;Thanakit Saeyang;Yoshihiro Ogiso;Yuta Ueda;Masaki Kohtoku

2021 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2021 | Conference Paper |

>1.3-Tb/s VCSEL-Based On-Board Parallel-Optical Transceiver Module for High-Density Optical Interconnects

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa

Journal of Lightwave Technology

Year: 2018 | Volume: 36, Issue: 2 | Journal Article |

Cited by: Papers (13) | Patents (3)

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This paper gives a detailed description of a >1.3-Tb/s VCSEL-based on-board parallel-optical transceiver module for high-density optical interconnects. The optical module integrates a 28-Gb/s × 24-channel transmitter and receiver into one package with a 1-in2 footprint, thereby yielding a data rate density as high as 1.34 Tb/s/in2. A unique module design is developed to utilize the whole top surfa...Show More

>1.3-Tb/s VCSEL-Based On-Board Parallel-Optical Transceiver Module for High-Density Optical Interconnects

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa

Journal of Lightwave Technology

Year: 2018 | Volume: 36, Issue: 2 | Journal Article |

28-Gb/s ×24-channel on-board optical transceiver operated under an air-cooling environment

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa

2017 IEEE CPMT Symposium Japan (ICSJ)

Year: 2017 | Conference Paper |

Cited by: Papers (1)

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We demonstrate a 28-Gb/s × 24-channel on-board optical transceiver operated under an air-cooling environment. The optical transceiver realizes a data rate density as high as 1.34 Tb/s/inch2 with a total power consumption of 9.1 W. A unique packaging structure of the transceiver enables using the whole top surface for thermal dissipation by the aid of air-cooling heatsink. The optical module realiz...Show More

28-Gb/s ×24-channel on-board optical transceiver operated under an air-cooling environment

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa

2017 IEEE CPMT Symposium Japan (ICSJ)

Year: 2017 | Conference Paper |

A Very High-Dense on-Board Optical Module Realizing >1.3 Tb/s/Inch ^2

Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa;Hideyuki Nasu

2017 IEEE 67th Electronic Components and Technology Conference (ECTC)

Year: 2017 | Conference Paper |

Cited by: Papers (3)

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We demonstrate >1.3-Tb/s VCSEL-based on-board optical module for high-density optical interconnects. The optical module integrates 28-Gb/s × 24-channel transmitter and receiver into one package of 1-inch2 footprint. Subsequently, the total data rate is as high as 1.34 Tb/s. As investigated the temperature distributions of an optical module in calculation and experiment, an operating case temperatu...Show More

A Very High-Dense on-Board Optical Module Realizing >1.3 Tb/s/Inch ^2

Kazuya Nagashima;Toshinori Uemura;Atsushi Izawa;Yozo Ishikawa;Hideyuki Nasu

2017 IEEE 67th Electronic Components and Technology Conference (ECTC)

Year: 2017 | Conference Paper |

>1-Tb/s on-board optical engine for high-density optical interconnects

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atushi Izawa;Yozo Ishikawa

2017 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2017 | Conference Paper |

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We demonstrate a >1-Tb/s VCSEL-based on-board optical engine for high-density optical interconnects. The optical engine integrates 28-Gb/s × 24-channel transmitter and receiver into one package of 1-inch2 footprint. Hence, the total data rate is as high as 1.34 Tb/s. The thermal simulation is performed when operating all 24 channels with the total power of 9.1 W with CDR and 6.0 W without CDR, ass...Show More

>1-Tb/s on-board optical engine for high-density optical interconnects

Hideyuki Nasu;Kazuya Nagashima;Toshinori Uemura;Atushi Izawa;Yozo Ishikawa

2017 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2017 | Conference Paper |

Thermal design of 28-Gb/s × 24-channel CDR-integrated VCSEL-based transceiver module

Toshinori Uemura;Kazuya Nagashima;Naoya Nishimura;Atsushi Izawa;Yozo Ishikawa;Hideyuki Nasu

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

Cited by: Papers (2)

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We report the thermal design of 28-Gb/s × 24-channel CDR-integrated VCSEL-based transceiver optical module for high density optical interconnects. The transceiver module realizes a very high data rate density of 1346 Gb/s/inch2 at a total power consumption of 9.1 W. A unique design of this optical module realizes to use the whole top surface for thermal dissipation. We performed thermal simulation...Show More

Thermal design of 28-Gb/s × 24-channel CDR-integrated VCSEL-based transceiver module

Toshinori Uemura;Kazuya Nagashima;Naoya Nishimura;Atsushi Izawa;Yozo Ishikawa;Hideyuki Nasu

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

28-Gb/s ×4-channel solderable optical transceiver module for QSFP28

Hideyuki Nasu;Kazuya Nagashima;Yozo Ishikawa;Atsushi Izawa;Yoshinobu Nekado;Tomofumi Kise

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

Cited by: Papers (6)

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A solderable 28-Gb/s × 4-channel VCSEL-based optical transceiver module was designed for QSFP28 MPO-type transceiver and AOC applications. The module exhibits 28.05-Gb/s × 4-channel simultaneous operation with a jitter margin of -0.4 U.I. at the case temperature of 70 °C. The 4-channel module can be simply mounted on a PCB in compliance with the standard of QSFP28 edge connector, together with oth...Show More

28-Gb/s ×4-channel solderable optical transceiver module for QSFP28

Hideyuki Nasu;Kazuya Nagashima;Yozo Ishikawa;Atsushi Izawa;Yoshinobu Nekado;Tomofumi Kise

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

4-Channel miniature solderable optical modules with an integrated CDR circuitry for 100-Gb/s short reach applications

Kazuya Nagashima;Tomofumi Kise;Yozo Ishikawa;Hideyuki Nasu

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

Cited by: Papers (3)

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We demonstrate 4-channel miniature solderable VCSEL-based optical modules with an integrated clock-data-recovery (CDR) circuitry for 100-Gb/s applications. We also propose to use a 1060-nm VCSEL-based optical link using the module and a conventional OM2 fiber cable to reduce the total link cost. When operating the module by a bit stream of 28.05-Gb/s, 231-1 PRBS in the built link system, we observ...Show More

4-Channel miniature solderable optical modules with an integrated CDR circuitry for 100-Gb/s short reach applications

Kazuya Nagashima;Tomofumi Kise;Yozo Ishikawa;Hideyuki Nasu

2016 IEEE CPMT Symposium Japan (ICSJ)

Year: 2016 | Conference Paper |

28-Gb/s × 24-channel CDR-integrated VCSEL-based transceiver module for high-density optical interconnects

Kazuya Nagashima;Naoya Nishimura;Atsushi Izawa;Tomofumi Kise;Hideyuki Nasu

2016 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2016 | Conference Paper |

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We demonstrate a very high density 28-Gb/s × 24-channel CDR-integrated VCSEL-based optical transceiver module. The optical module achieves a very high data rate density of 1344 Gb/s/inch2 (2.08 Gb/s/mm2). An optical link employing the optical module achieved a jitter margin of 0.48 U.I. at a BER of 10-12 at case temperatures ranging from 31 °C to 70 °C with a very low link power of 13.5 mW/channel...Show More

28-Gb/s × 24-channel CDR-integrated VCSEL-based transceiver module for high-density optical interconnects

Kazuya Nagashima;Naoya Nishimura;Atsushi Izawa;Tomofumi Kise;Hideyuki Nasu

2016 Optical Fiber Communications Conference and Exhibition (OFC)

Year: 2016 | Conference Paper |

A Record 1-km MMF NRZ 25.78-Gb/s Error-Free Link Using a 1060-nm DIC VCSEL

Kazuya Nagashima;Tomofumi Kise;Yozo Ishikawa;Hideyuki Nasu

IEEE Photonics Technology Letters

Year: 2016 | Volume: 28, Issue: 4 | Journal Article |

Cited by: Papers (25)

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We report successful achievement of a record long distance error-free transmission of 1000-m 50- $\mu \text{m}$ -core multi-mode fiber (MMF) in a non-return-to-zero 25.78-Gb/s modulated vertical cavity surface emitting laser-based optical link using four-channel miniature parallel-optical modules. The optical power is centralized within the core of MMF by an active alignment assembly. The restrict...Show More

A Record 1-km MMF NRZ 25.78-Gb/s Error-Free Link Using a 1060-nm DIC VCSEL

Kazuya Nagashima;Tomofumi Kise;Yozo Ishikawa;Hideyuki Nasu

IEEE Photonics Technology Letters

Year: 2016 | Volume: 28, Issue: 4 | Journal Article |

A fully engineered QSFP AOC using solderable 4-channel optical transceiver modules

Hideyuki Nasu;Yozo Ishikawa;Naoya Nishimura;Masao Shinoda;Atsushi Izawa;Kazuya Nagashima;Yoshinobu Nekado;Tomofumi Kise

2015 IEEE CPMT Symposium Japan (ICSJ)

Year: 2015 | Conference Paper |

Cited by: Papers (5)

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We report a solderable 4-channel VCSEL-based optical transceiver module perfect for high-volume production of QSFP AOCs. The 4-channel module can be simply mounted on a PCB together with other electronics components through a solder reflow process. We fabricated a PCBA in compliance with the standard of QSFP edge connector. The PCBA has an MCU written with a firmware included with a look-up table ...Show More

A fully engineered QSFP AOC using solderable 4-channel optical transceiver modules

Hideyuki Nasu;Yozo Ishikawa;Naoya Nishimura;Masao Shinoda;Atsushi Izawa;Kazuya Nagashima;Yoshinobu Nekado;Tomofumi Kise

2015 IEEE CPMT Symposium Japan (ICSJ)

Year: 2015 | Conference Paper |

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