LLNL installs record-setting laser diode arrays from Lasertel

Lawrence Livermore National Laboratory has installed high-powered laser diode arrays for the ELI high-rep-rate Petawatt laser system.

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Figure. One of the five arrays built by Lasertel for the ELI Petawatt laser system.

Lawrence Livermore National Laboratory (LLNL) has installed high-powered laser diode arrays developed by Lasertel (Tucson, AZ) that will act as the primary pump source for the High repetition-rate Advanced Petawatt Laser System (HAPLS), which will be installed at the Extreme Light Infrastructure (ELI) facility in the Czech Republic.

Constantin Haefner, HAPLS program director at LLNL says the laser diode arrays are the highest peak power modules ever produced and, as the primary pump source for the HAPLS laser, will be the enabling technology for this next-generation, high-rep-rate Petawatt laser system.

The LLNL-designed HAPLS laser will be capable of reaching peak powers greater than one petawatt. When installed at the ELI, the Petawatt laser will drive international scientific research in areas as diverse as advanced imaging, particle acceleration, medical applications, biophysics, chemistry and quantum physics in addition to national security applications and industrial processes such as laser peening and laser fusion.

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Each semiconductor laser diode array consists of multiple 888-nm laser diode bars mounted on water-cooled stacks. The array operates at a brightness of 10 kW/cm2, a world record, at a repetition frequency of 10 Hz. Each array operates at a total peak power of 800 kW, with four such arrays combined and used as the primary pump sources for the HAPLS laser. Over 500,000 combined laser diode emitters, the largest number ever assembled, create the combined total diode optical input power of 3.2 MW.

Source: Lasertel

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