In addition to common parameters like wavelength, output power and brightness, requirements in defense vary from industrial products. Contrary to industrial applications, where key requirements are total cost of ownership and lifetime measured in operating hours, defense applications use size, weight and power (SWaP) as the key performance metrics. In addition, overall system efficiency is a crucial factor in saving space and weight. Reliability is typically measured in years of service with comparatively low overall laser on time and not in laser operating hours. We present new products based on the Coherent FACTOR series of fiber coupled high power diode laser modules, optimized for defense applications. Modules at 793 nm for Thulium fiber laser pumping and modules at 976 nm for Ytterbium fiber laser pumping are presented. Compared to industrial FACTOR series modules, these devices are optimized for highest output power and low weight compared to their industrial counter parts. Modules are designed, qualified and tested to ensure reliable operation in the demanding environmental conditions of defense applications. Modules at 793 nm ranging from 100 W to 500 W of output power are shown. The FACTOR-16 module is rated at 100 W from a 100 µm 0.22 NA fiber. 500 W are achieved from a T-Bar based packaged equipped with a 200 µm 0.2 NA fiber. At 976 nm, the new lightweight FACTOR-16 package with 150 W from a 100 µm 0.22 NA fiber is shown. In addition, power scaling results from FACTOR-22 and FACTOR-44 modules with power levels of 400 W and 600 W respectively are presented.
In this paper, we present the new FACTOR-series of fiber coupled high power diode lasers based on single emitters. While fiber coupled modules at DILAS and COHERENT have mostly been based on high power diode laser bars in the past, increased output power, advances in automated alignment processes and reduction in cost of optical components have tipped the scale towards single emitter-based packages in certain areas. The product portfolio includes emission wavelengths between 790 nm and 1060 nm with output power of up to 600 W. Fiber core sizes of 100 µm and 200 µm are offered. All products are available with optional wavelength stabilization to reduce the spectral line width and minimize the wavelength shift over varying output power and temperature. We present Ytterbium pump modules at 976 nm with up to 600 W output power, modules for Thulium pumping at 793 nm with up to 250 W and modules near 880 nm optimized for different absorption peaks of Vanadate, ranging in output power between 65 W and 150 W. In addition to pump modules, industrial turnkey systems for polymer welding and soldering have been developed based on the same product line. Up to 100 W of output power are offered from a 3 HU - ½ 19” rack mountable chassis including the power supply, diode controller, a pilot beam and safety features complying with performance level ‘e’.
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