Yüksek güçlü fiber lazer uygulamaları için CO2 lazer cam işleme

High power lasers have been extensively used in industry, military, astrophysics and medicine for decades. Thanks to developments in optical fiber technology in terms of transmittance, heat resistance, robustness, stability and power endurance, fiber lasers have recently become more favourable compared to conventional laser types such as gas and solid state lasers. Furthermore, high power fiber lasers possess advantageous features like compactness, robustness, all-fiber and alignment-free operation. Besides advances in high power fiber lasers, the structure and power endurance of the critical components as well as their integration quality have been improved. CO2 laser is one the most effective source in glass processing of optical fibers since it provides stable and homogenous laser radiation resulting in a clean process. We have tailored optical fibers to attain low-loss, high quality, mechanically stable integration points by using CO2 laser radiation. Moreover, we have produced high power fiber laser components such as end-cap and ball lens for manipulating the output beam. By tapering the optical fibers, we have fabricated pump and signal combiners which have mode field adapting properties. The 7x1 pump combiner was integrated to the high power fiber laser system we have developed in our laboratory. Pump source limited power handling capacity of this pump combiner was measured as 850 W with an overall efficiency of 98 percent. In addition, the same pump combiner was adapted to a high power fiber laser system which was built by using an in-house fabricated active fiber. Finally, we have fabricated a 3x1 laser combiner to combine two in-house fiber lasers with an output power of 1 kW and 690W at 1080nm wavelength. The maximum combined power was measured as 893 W by using two ports of this combiner with a launched power of approximately 500 W from each of them. The overall efficiency of the combiner was calculated as 93 percent. On the whole, we have performed successful glass processing by using CO2 laser radiation. As a consequence of optimized, high quality tapering and splicing of optical fibers, we have fabricated critical components for high power fiber lasers such as end-cap, ball lens, pump and laser combiners.