Lightmatter introduced the Guide light engine, built on its new Very Large Scale Photonics (VLSP) laser architecture, targeting the next phase of co-packaged optics (CPO) and near-package optics (NPO) for AI data centers. The company positions VLSP as a shift from discrete indium phosphide (InP) laser assemblies toward highly integrated, semiconductor-style photonic manufacturing, aimed at increasing bandwidth density and deployment scalability while improving wavelength stability.
Lightmatter’s new Guide platform addresses a key bottleneck in CPO systems: laser power scaling. Today’s external laser small form factor pluggable (ELSFP) modules face thermal and reliability limits as optical power rises, constraining bandwidth growth and driving up cost, power consumption, and rack space. Lightmatter says VLSP overcomes these limits by integrating lasers at scale, reducing component count and enabling tighter wavelength control for dense wavelength division multiplexing (DWDM).
According to Lightmatter, the first Guide validation platform enables up to 100 Tbps of switch bandwidth in a compact 1RU system—capacity that would otherwise require roughly 18 conventional ELSFP modules across 4RU. The Guide light engine is designed to scale from 1 to 64 wavelengths and beyond, and to interoperate with third-party CPO and NPO solutions.
- Initial optical bandwidth density improvement of up to 8× compared with discrete laser approaches
- Up to 51.2 Tbps per laser module for CPO and NPO applications
- Minimum optical output power of 100 mW per fiber
- 16 wavelengths generated with multiplexing
- Closed-loop wavelength control with dual 400 GHz grids interleaved at 200 GHz offset and ±20 GHz accuracy, achieving up to 0.1 dB channel power uniformity in fiber
- Validation platforms support up to 100 Tbps switch bandwidth in 1RU
- Sampling now as part of Lightmatter’s Passage L-Series and M-Series rack-scale validation systems
- Evaluation kits available on a priority basis to selected partners
“Our customers are building infrastructure for MoE and world models at scales that demand semiconductor-grade integration everywhere—including the light source,” said Nick Harris, co-founder and CEO of Lightmatter. “Scalable lasers unlock scalable CPO. Guide delivers massive bandwidth density through integration.”
🌐 Analysis
The Guide launch builds directly on Lightmatter’s Passage co-packaged optics roadmap, extending integration beyond optical engines to the laser source itself—a step many in the CPO ecosystem view as necessary as electrical I/O scaling slows. Recent industry work on 224G electrical interfaces, tighter DWDM spacing, and rack-scale optical fabrics has increased focus on laser density and wavelength control, where discrete ELSFP architectures face practical limits. Competitors across silicon photonics and optical module suppliers continue to explore external and integrated laser strategies, but VLSP positions Lightmatter to vertically integrate a critical part of the CPO stack as hyperscalers evaluate production-scale CPO deployments later this decade.
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