Facet-Attached Micro-Lenses
Facet-Attached Micro-Lenses- the benefits
No need for active alignment
Adaptable for any design due to software defined additive fabrication
Compensates vertical and lateral alignment offsets by up to ± 15 µm with 1dB penalty
Flexibility to support standard and non-standard waveguide pitch
Scaling from low-volume prototyping up to high-volume mass production
Step 1: Drop dispense photoresist and passive detection of waveguide interfaces
Step 2: Automatic nanofabrication of micro optical elements
Step 3: Post development steps and cleaning of the assembly
Mode field matching from 2µm up to 10+ µm, with elliptical mode field compensation.
Compatible with SM/PM fibers with 8, 12, 24, 32+ channels
Compatible with a wide range of material platforms: silicon on insulator, silicon nitride, thin film lithium niobate (TFLN), indium phosphide, and more.
Back reflection: below -30dB
Operational range 530 nm to 2000 nm
Typical insertion loss down to 0.6 dB
High power operation >1 W @ 1550 nm
Material absorption negligible
Below 10% mode-field and focus length deviation
Below σ = 50 nm detection accuracy
Below ±100 nm shape accuracy
Less than 10 nm RMS-roughness
Environmental Stress Tests
Damp heat: 4000 hours at 85 °C/85 % RH
Thermal Cycling: >250 cycles -40 °C to 85 °C
Reflow soldering: 3 cycles, 270 °C
Die bonding 310 °C
Mechanical integrity Tests
Acceleration of up to 1500g
Vibration: 20 g, 20 to 2000 Hz 4 min/cycle, 4 cycle/axis
High Power Operation
>1 W at 1550 nm
Additional Tests
Operation at 4K. 10 Cryogenic cooling cycles