Carmel4
The ‘Carmel4’ is a 400Gbps Photonic Integrated Circuit (PIC) engine supporting four optical transmit lanes operating at 100Gbps per lane with PAM-4 modulation (53.125 Gbaud). It is based on Silicon Photonics (SiPho) technology and includes an integrated Continuous Wave (CW) laser, four low-loss Mach-Zehnder Modulators (MZMs), low speed phase shifters, and power monitors. The block diagram of the PIC engine is shown below.
The PIC dies are sold post burn-in, and are both electrically and optically tested.
About this product
- Small footprint silicon photonics transmit-side PIC
- Integrated laser using DustPhotonics Low-Loss Laser Coupling (L3CTM) process
- Superior link budget due to low modulation insertion loss and excellent laser coupling efficiency
- Modulators are continuously self-calibrated using integrated power monitors TEC-less operation
- 90 Ω typical differential input impedance
- Compatible with immersion cooling
Optical Interface
DR4 (4X100G)
Data Rate
400G
Integrated / External Laser
Integrated
Engine / Chip
Engine
Applications
400G – DR4 QSFP and OSFP
800G-DR8/DR8+ QSFP or OSFP using two Carmel4 devices
Short Reach AOC or transceiver applications
FRO, LRO and LPO applications
PIC die dimensions
5 mm x 5.3 mm
Laser Configuration
1 integrated laser
Optical Lanes
4
Fiber Coupling
Butt coupling
Cooling Compatibility
Immersion cooling supported (butt coupling configuration)
DPST-41DR-1BC
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