ELSFP (External Light Source Fixed Pointer) modules provide continuous-wave lasers to CPO switches. Rather than integrating lasers inside the switch package, ELSFP places lasers in a separate, accessible module connected via fiber arrays.
This architecture simplifies switch thermal management — lasers are external — but requires high-performance thermal substrates to manage heat from dense multi-wavelength laser arrays.
Industry-standard architecture for 8-channel CW laser arrays in ELSFP modules.
Each ELSFP module typically contains 8 CW-DML lasers at 100Gb/s each = 800Gb/s per module.
8 high-power CW lasers in dense footprint. Heat flux exceeds 500 W/cm².
Handles extreme heat flux from dense multi-channel laser arrays
Multi-layer copper for laser electrode fan-out and grounding
Multi-channel configurations for dense laser arrays
Direct replacement for ELSFP-02.0 standard submounts
Sign in to see the full spec table, standard sizes, thermal/electrical properties, and OIF-ELSFP-02.0 compatibility matrix. Custom DFM available for unique laser array geometries.