Lumentum L4-series diode lasers offer up to 10 W of power from a 105 μm fber. The L4 is a
revolutionary platform based on a long history of existing fber-coupled L2 and L3 packages,
incorporating a highly reliable design into a scalable commercial product.

L4 multimode pump modules offer high brightness, a small
footprint, and simplifed thermal management by distributing the
diodes (heat sources), allowing the use of either air- or watercooled architectures with predictable high reliability.

Lumentum leverages existing manufacturing facilities around the
world to offer a cost-effective solution with all the necessary and
ideal attributes for the laser pump market.

Key Features
• 10 W output power
• High reliability
• 105 μm aperture
• 0.22 or 0.15 NA
• Isolated electrical contacts
• L4i full-fber feedback protection
Applications
• Fiber laser pumping
• Material processing
• Graphic arts
• Medical
• Remote power generation
• Pyrotechnic ignition