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www.luxtera.comLuxtera Proprietary
5th International Symposium for Optical Interconnect in Data Centres
Date: 19th September 2017Location: Meeting Room J2, ECOC Exhibition 2017
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www.luxtera.comLuxtera Proprietary
InP vs Silicon Photonics
Peter De DobbelaereLuxtera Inc.9/19/2017
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Founded in 2001, Luxtera has the world’s first Silicon Photonics platform proven in volume transceiver production
In continuous production since 2009, > 1Mu transceivers deployed
Strong demand for Luxtera’s 100G products: Cloud Operators require cost‐effective 100G Single Mode Optics at high volume
Luxtera Company Introduction
9/22/2017Page 3
Shipments of new 100G products started in Q1 2016, with now more than 300k units deployed leading the market on price/performance and availability. Scaling production of new 100G optics products (1M units/year)
Continuing R&D Investment: Roadmap supports 5 year hyper‐growth cycle of 25/50/100/400G SMF transceivers leading to broad scale SoCintegration.
Luxtera Inc. Proprietary
Photonic InterposersFor ASIC/SoC
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• Fabless approach leveraging semi‐conductor technology− Commercial semiconductor fabs− Commercial OSAT for assembly and test
• Advanced photonic device libraries are a must− State‐of‐the‐art transceiver performance is required− Many opportunities for improvement still to be explored
• In‐house electronic and photonic circuit design − Co‐design of electronics and photonics within a common EDA‐environment− Silicon Photonics allows new architectures and high level of integration
• Reliable and stable light source − Micro‐packed laser diode or remote light source
Luxtera’s Silicon Photonics
Luxtera Inc. Proprietary9/22/2017
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• Fabless approach leveraging IC technology− No “boutique” processes− Commercial fabs & OSAT for assembly and test− Over its history Luxtera worked with 3 fabs for silicon photonics wafer
manufacturing. March 2017 announcement: Luxtera works with TSMC on developing a 300 mm silicon photonics process
• Silicon photonics wafer yields are usually very high− Capable processes and tool sets in commercial fabs− Capable process monitors− Low density of photonic circuits
• Process Design Kit (PDK) allows IC design approach− Device Library p‐cells w/behavioral models based on measured performance− DRM/DRC Deck− LVS & Parasitic extraction− Co‐simulation photonics + electronics
Silicon Photonics Wafer Manufacturing
Luxtera Inc. Proprietary 9/22/2017Page 5
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• Advanced photonic device libraries are a mustState‐of‐the‐art transceiver performance is required, scaling to higher data rates requires:
− Higher signal to noise ratio: lower losses, higher modulation efficiency, higher detector responsivityo Losses of coupling in and out of the Si Photonics chip are one of the major challenges
− Higher bandwidth modulators− Higher bandwidth photodetectors
• Developing design devices in TSMC process− Advanced process:
o Enhanced device performanceo Process capabilities allow broader design space for photonic devices
− Streamlined supply chain:o Electronic and Photonic ICso TSV capability
Silicon Photonics Device Libary
Luxtera Inc. Proprietary 9/22/2017Page 6
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Monolithic Integration (4x14 Gbps IC)
Integration Photonics & Electronics
Luxtera Inc. Proprietary 9/22/2017Page 7
Hybrid Integration (4x28 Gbps ICs)
Luxtera commercialized both, each approach has merits, we opted for hybrid integration going forward:− Scalability− Product and development cost− Business/Supply chain considerations
Photonic IC
Micro‐bumps
Electronic IC
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• Co‐design of electronics and photonics within a common EDA‐environment
• Silicon Photonics allows new architectures and high levels of integration
System level simulation using behavioral models & parasitics of photonic devices and interconnects
In‐house electronic and photonic circuit design
Luxtera Inc. Proprietary 9/22/2017Page 8
TX output 26 GB PAM‐4, simulation vs actual:
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• Conventional InP laser diode in silicon micro‐package: − Mature InP laser diode technology− Faraday rotator as optical isolator for laser stability− Efficient coupling scheme− Delivered to module assembly line as known good light
source− Wafer level manufacturing:
Light Source Integration
Luxtera Inc. Proprietary 9/22/2017Page 9
• High wall‐plug efficiency: − > 15% (incl. coupling efficiency LD to Si P IC)− Single light source for 8 channels 25 Gbps (PSM‐4)
Reliable and stable light source − Micro‐packed InP laser diode for pluggable modules (require co‐packaging)− Remote light source for highly integrated and dense systems decouples light source and transceiver functions, e.g. ASIC integration (High T, serviceability, yield,…)
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Electronic IC to Photonic IC
Wafer Level Optical Assembly of Electronics and Photonics
Luxtera Inc. Proprietary 9/22/2017Page 10
Light Source to Photonic IC
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Silicon Photonics Optical Engine (100G TX+RX PSM‐4)
Luxtera Inc. Proprietary 9/22/2017Page 11
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High‐Speed Interconnect Implementations & Form Factors
Luxtera Inc. Proprietary 9/22/2017Page 12
CONTEMPORARY – TodayFront Pluggable Modules
EMERGING – 2017/18Embedded Optical Modules
Next– 2020+ASIC/SOC Integration
Embedded optical module FiberSwitch ASIC
PCBA
FiberSwitch ASIC w/ photonics
PCBA
Switch ASIC Re‐timer Optical Module
PCBA
ASIC with photonic I/O on interposer
QSFP28 Module
200 Gbps Mid‐Board Optics Module
TSV
MZI
PD
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Scales in Performance
• Advanced photonic device libraries allow link margin and performance needed for ever increasing data rates
• Latest CMOS technology nodes for electronic circuits required for electronic functions (28 nm, 7 nm)
• Density scaling in multiple dimensions: data rate, modulation, wavelength, spatial
• Enables SoC integration with ASICs:
− Very large scale integration of hundreds of transceiverson a single device
− Very harsh (hot) environment ‐> remote III‐V light source
Silicon Photonics is the winning technology for DC interconnect
Luxtera Inc. Proprietary9/22/2017
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Scales in Manufacturing
• Leverages semiconductor industry manufacturing infrastructure (fabless)
• Leverages semiconductor technology roadmap
• OSAT for Wafer Test & Assembly
• DFM, DFT, DFR
• Simplified and highly automated optical assembly
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www.luxtera.comLuxtera Proprietary
Acknowledgement:This presentation contains work of the entire
Luxtera team and its past and present technology partners, their contributions are greatly
acknowledged.
Thank you for your interest.