High Brightness Diodes and 600 W 60 Efficient Low SWaP Fiber-coupled Package Enabled by Reduced-mode (REM) Diodes

摘要

In this paper, we show results of further brightness improvement and power-scaling enabled by both the rise inchip brightness/power and the increase in number of chips coupled into a given numerical aperture. We report a new chiptechnology using x-REM design providing a record ~340 W output from a 2×12 nLIGHT element® in 105 μm diameterfiber. These diodes will allow next generation of fiber-coupled product capable of >250W output power from 105μm/0.15 NA beam at 915 nm. There is also an increasing demand for low SWaP fiber-coupled diodes for enablingcompact high energy laser systems for defense applications. We have demonstrated 600 watts and 60% efficiency at15C in 220 μm/0.22 NA fiber resulting in specific mass and volume of 0.44 kg/kW and of 0.5 cm3/W respectively.