Coherent Expands POLS Portfolio with Full C-Band Amplification for AI Datacenter Networks

What happened

Coherent announced expansion of its Pluggable Optical Line System portfolio with a full C-band, high-power variable-gain amplifier in QSFP form factor, supporting up to 32 DWDM wavelengths and 25.6Tbps across 2–200km, targeting 800G ZR/ZR+ coherent optics for AI datacenter traffic. This product enhancement aligns with the company's dominant Datacenter & Communications segment, which grew 41% Y/Y in Q3 FY26 and now represents 75% of total revenue. The announcement reinforces Coherent's vertical integration and photonics expertise but does not alter near-term financials; the stock already trades at 145x earnings and 49x EV/EBITDA based on July 2026 data. Investors should note that while this expands the addressable market for AI networking, the key execution metrics remain the 6-inch indium phosphide ramp, gross margin above 39.6%, and inventory stabilization. The master report had a WAIT rating with an attractive entry at $285 and trim above $390.

Implication

Over 6–18 months, successful commercial adoption of POLS with full C-band amplification could drive incremental AI datacenter revenue and strengthen Coherent's competitive position, but investors should demand evidence of margin expansion and cash conversion before paying a premium.

Thesis delta

The core investment thesis is unchanged: Coherent owns a real manufacturing edge in indium phosphide and is well positioned for AI optical demand, but the stock's valuation already discounts strong execution. This product announcement adds to the company's portfolio breadth but does not by itself alter the balance of risk and reward; the WAIT rating remains appropriate until gross margin and free cash flow confirm the ramp.