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INFRASTRUCTURE

Quality Engineer, Optics

Photonics Challenges for DC Optics

Vincent Zeng

• Facebook Data Center In Scale

• PIC Opportunity and Challenges

• Wafer Level

• Packaging

• Bath Tube Challenges

• Interoperability

Agenda

Facebook Data Center In Scale

Papillion, NE

Fort Worth, TX

Prineville, OR Forest City, NC Luleä, Sweden Altoona, IA

Clonee, Ireland Los Lunas, NM Odense, Denmark

New Albany, OH Henrico, VA Newton County, GA

Huntsville, AL

Eagle Mountain, UT

Singapore

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100G Optical Transceiver Quality Performance

• DOA- almost all failures were

reported within 3months after power

on

• Among those failures, 97% comes

from laser related

• We should have more stringent

screening or Burn In process on

laser

Yield Management- Starts From Wafer

Level

• Fully rely on post

burn-in Process

• Volume Drives

• Laser Integration

• RF management

• Optical coupling and

alignment

Packaging Challenges

• Standard process

• Automation

Co-packaged Optical Solution

• Conventional

pluggable optics-

not scalable

• On-board optics

• Co-packaged optics• Wafer level integration/test

• Packaging challenge to wafer

• Better process control

Infant Mortality and Wear Out Reliability Concern

• Too early to Consider

Reliability when

• Less Stringent BI

Screening

• Less wafer level Process

Control

• Classic GR468 ONLY

Laser BI

Optimization

DOA

Challenges

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Facebook Network Fabric Topology

Interoperability challenges

Questions

Thank you