And a further reminder of POET'S differentiation from the competition

POET’s Dielectric Interposer Differentiators taken from corporate presentation

Relative to Silicon Photonics

• Ultra Low Loss Material - <0.5dB/cm loss demonstrated
• Gain - SOA’s can be integrated for gain
• Roadmap to Athermal Lasing - Enables tight wavelength spacings for future scaling
• Low Loss Coupling - low coupling losses from laser to waveguides, low coupling losses to the fiber with fiber matched waveguide mode
• External Modulators - electro-absorption modulators possible versus TW MZI
• Directly Modulated Laser compatibility
• WDM - Reach / Performance

Relative to Silica AWGs

• Tighter Bend Radius - Substantially smaller Mux/De-Mux footprint
• Enables LAN WDM wavelength spacing - Single chip quad channel lasers possible
• InP Integration - capable of integration directly on InP, athermal gratings and filters on chip
• Flexible mode matching capabilities - Multi waveguide structures possible for both chip side and fiber side mode matching, Variable and customizable refractive indices
• Readily scalable to 12 inch Silicon Wafers
• Low Stress - up to 20um Dielectric deposited with little to no stress
• Manufacturable Mode Convertors

Waveguide Integration

Optical interposer

• Dielectric waveguides on TOP of active or passive CMOS
• No compromise in waveguide design versus CMOS design
• Bulk silicon wafer promotes better laser thermal management
• Interposers are largely passive wafers (high manufacturing yield) 

Silicon Photonics

• Si Waveguides in same layer as active CMOS
• SOI thickness for CMOS not compatible with SOI thickness for transistors
• Thermal management difficult – impacts laser reliability/cost
• Silicon waveguides are lossy and not athermal 

See images of slides describing key architectural and functional differences of POET vs competitors.