External Laser Source (ELS)
A key component solving CPO's thermal and serviceability challenges. By separating lasers from the ASIC package into front-panel pluggable modules, it enables thermal management and hot-swap serviceability. ELSFP (External Laser Source SFP) form factor is the standard. Lumentum leads with UHP (Ultra-High-Power) 1310nm lasers, sampling in 2026 Q1. A tollgate that is essential regardless of which platform wins.
Investment Confidence
Theme Analysis
Key Drivers
- CPO thermal management -- laser separation essential
- ELSFP form factor standardization progressing
- Serviceability and hot-swap requirements -- data center operational convenience
- Lumentum UHP laser 2026 Q1 sampling
Risk Factors
- Competition with CPO integrated laser approach
- ELS pricing and power efficiency issues
- Standard competition -- potential coexistence of multiple form factors
Catalysts
- Lumentum ELSFP mass production begins
- Coherent ELS product lineup announcement
- CPO platform ELS dependency confirmed
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