A Fully-integrated Multi-λ Hybrid DML Transmitter

Liang, Di; Zhang, Chong; Roshan-Zamir, Ashkan; Yu, Kunzhi; Li, Cheng; Kurczveil, Géza; Hu, Yingtao; Shen, Wenqing; Fiorentino, Marco; Kumar, Satish; Palermo, Samuel; Beausoleil, Raymond G.

doi:10.1364/ofc.2018.th3b.5

Cited by 4 publications

(5 citation statements)

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“…Both designs will be implemented in QD version of devices soon. We note here that high-speed modulation to the MOS capacitor region (Design B) showed great potential for much higher modulation bandwidth [26]. This topic will be discussed in details in a future publication.…”

Section: Thermal Managementmentioning

confidence: 81%

“…Improved metallization in QD lasers is necessary to minimize joule heating effect and improve energy efficiency, and integrated thermal shunt structure will add another layer of positive thermal management to make it more robust. QD intrinsic material property-determined poor direct modulation bandwidth is hard to overcome, but higher-speed MOS capacitor modulation showing 15 GHz bandwidth in the same 50 μm diameter design [26] and photon-photon resonance [101], [10] are being explored to be efficient alternative solutions to reach 25 Gb/s target. New CMOS driver chips fabricated at 28 nm node were just arrived from the foundry during manuscript preparation.…”

Section: Discussionmentioning

confidence: 99%

“…To form the heterogeneous MOS capacitor, 20 nm-thick Al 2 O 3 bonding interface dielectric is sandwiched by lightly doped (5 × 10 16 cm −3 ) p-Si device layer and heavily doped n-InP (2 × 10 18 cm −3 ) layer. Since the fundamental microring resonator mode overlaps with this capacitor, charging or discharging it by applying voltage bias to capacitor anode P2 and common ground N introduces plasma dispersion [56], [57] and other useful electro-optic effects [23] for laser wavelength and output power tuning, and high-speed laser modulation in this new 3-terminal diode laser configuration [26].…”

Section: A Heterogeneous Mqw Microring Laser Arraymentioning

confidence: 99%

See 2 more Smart Citations

Fully-Integrated Heterogeneous DML Transmitters for High-Performance Computing

Liang

Roshan-Zamir

Fan

et al. 2020

J. Lightwave Technol.

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Optical connectivity, which has been widely deployed in today's datacenters and high-performance computing (HPC) systems, is a disruptive technological revolution to the IT industry in the new Millennium. In our journey to debut an Exascale supercomputer, a completely new computing concept, called memorydriven computing, was innovated recently. This new computing architecture brings challenges and opportunities for novel optical interconnect solutions. Here, we first discuss our strategy to develop appropriate optical link solutions for different data traffic scenarios in memory-driven HPCs. Then, we present detailed review on recent work to demonstrate fully photonics-electronicsintegrated single-and multi-wavelength directly modulated laser (DML) transmitters on silicon for the first time. Compact heterogeneous microring lasers and laser arrays were fabricated as photonic engines to work with a customized complementary metal-oxide semiconductor (CMOS) driver circuit. Microring lasers based on conventional quantum well and new quantum dot lasing medium were compared in the experiment. Thermal shunt and MOS capacitor structures were integrated into the lasers for effective thermal management and ultra low-energy tuning. It enables a

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Section: Thermal Managementmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: A Heterogeneous Mqw Microring Laser Arraymentioning

confidence: 99%

See 1 more Smart Citation

Fully-Integrated Heterogeneous DML Transmitters for High-Performance Computing

Liang

Roshan-Zamir

Fan

et al. 2020

J. Lightwave Technol.

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“…As shown in Fig. 18, a hybrid III-V silicon transmitter based on microring laser with thermal shunt, MOS capacitor and CMOS driver has been demonstrated [106,107]. The thermal shunt is used to transfer the Joule heat directly to substrate by good thermal conductivity metals.…”

Section: Hybrid Electro-optic Modulatorsmentioning

confidence: 99%

Modulation on Silicon for Datacom: Past, Present, and Future (Invited Review)

Wang¹,

Huang²,

Chen³

et al. 2019

PIER

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Datacenters become an important part of technical infrastructure. The Datacom traffic grows exponentially to satisfy the demands in IT services, storage, communications, and networking to the growing number of networked devices and users. High bandwidth and energy efficient optical interconnects are critical to improve overall productivity and efficiency in data centers. Mega-data centers are expected to address the power consumption and the cost in which optical interconnects contribute quite a large part. Silicon photonics is a promising platform to offer savings in power and potential increase in bandwidth for Datacom. Several modulation techniques are developed in silicon photonics to reduce the optical mode volume or enhance the light matter effect to further improve the modulation efficiency. Many other materials such as III-V and LiNbO 3 are integrated on silicon photonics to maximize the optical link performance. This paper reviews several modulation techniques for Datacom, from vertical-cavity surface-emitting laser (VCSEL) direct modulation to silicon photonics modulators then to hybrid silicon modulators.

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“…Directly modulated microring laser array on silicon, in particular, is attractive for its compactness, low power consumption, and natural wavelength division multiplexing (WDM) architecture [14]. They are ideal to provide an energy-efficient and low latency interconnect solution in our high-performance computing systems to handle medium bandwidth traffic (e.g., less than 200 Gb/s per fiber) between computing nodes within a few tens of meters.…”

Section: Introductionmentioning

confidence: 99%