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The first laser chain (LC1) is a key component to the JHPSSL scaleable architecture, which is designed to combine eight laser chains of four gain modules each. Each laser chain is a compact 15kW solid state laser and the entire system configuration has the potential to achieve greater than 100kW, the ultimate goal of the Phase 3 JHPSSL program. The company's scaleable approach achieves higher power as more chains are added.
The laser chain milestone was demonstrated on Dec. 20, 2007, two days ahead of schedule. Power reached 15.3kW, exceeding the target requirement of 12.7kW; vertical beam quality was measured at 1.58x diffraction limit, surpassing the 2.0 target; turn-on time was 0.8 seconds, below the 1.0 second target; LC1's run time was more than 300 seconds, far beyond the target of 200 seconds; and the Electo-Optical Efficiency was 19.5 percent.
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In 2008, the JHPSSL team will assemble and test Laser Chain 2 (LC2) and integrate it with LC1. The system alignment and phase control of the two chains will then be demonstrated as part of the next major milestone, IFM3. “Completion of the remaining six laser chains and their integration into the final system configuration is on track for a full power system demonstration of 100kW by the end of 2008,'' added Marmo.