Performance improvements to wavelength stabilized high power 885nm diode laser modules

There is an increasing demand for high power diode laser packages with stabilized wavelength in the range of 878 nm to 888 nm for DPSS laser pumping applications. In this paper we present nLIGHT’s most recent development of wavelength-stabilized high power, single emitter laser diode packages, elementTM , for DPSS laser pumps. We will report on how we have scaled single emitter power from 10 W per emitter with our prior generation of 200 μm wide and 3.8 mm long devices to 15 W per emitter for next generation of 5 mm cavity length device for 200 μm - 0.22 NA fiber products. The improvement in power at the chip-on-submount level results in approximately 40% increase in wavelength-stabilized power out of 200 μm fiber excited with a 0.19 NA beam, compared to the current generation elementTM products. Additionally, we will report on the improvements to wavelength-stabilization utilizing volume Bragg gratings, and chip-on-submount reliability for these new 885 nm devices, which drives the overall package reliability.