According to scientists, stimulated Raman scattering is still one of the development challenges for multi kilowatt fiber lasers. To make an evolution in fiber laser technology towards multi kilowatt systems with the high-quality laser beam, fiber laser manufacturers should adopt stimulated Raman scattering mitigation strategies.
Stimulated Raman scattering is a nonlinear phenomenon. It appears when the optical intensity becomes more than the threshold value. Because most of the added energy provided to the fiber laser is wasted, the stimulated Raman scattering restraints the output power.
The optical feedback that reflects from the workpiece could be a reason for serious challenges like fiber laser instabilities or defects to a fiber laser’s pump diodes. The instability of the output power or laser beam can greatly influence the different industrial processes and change the quality of the product. When the effectiveness and the reliability of fiber lasers still are the main qualities for industrial applications.
Despite the enormous progress in Stimulated Raman scattering, the output power of single mode lasers hardly exceeds a few kilowatts. Transverse mode instability is another technical challenge that has a bad influence on the multi kilowatt system development. It is a nonlinear effect that appears in fiber lasers. Transverse mode instability occurs suddenly when the average power limit is reached.
The transverse mode instability is well-known for a long time so scientists could better study it and develop the most effective suppression schemes. The difficulty is that transverse mode instability suppression options often penalize Stimulated Raman scattering suppression. That is why it is necessary to find the right balance, while also paying attention to other standards like reliability considerations and technological limitations.
So the fiber lasers‘ power transcends the Stimulated Raman scattering threshold with the help of the applied traditional approaches. There is no comprehensive solution that is why the constant development helps in fiber lasers‘ understanding at multi kilowatt regimes. Still, there are some issues to be solved to produce reliable and highly efficient industrial fiber lasers.
Optromix Inc., headquartered in Cambridge, MA, USA, is a manufacturer of laser technologies, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of Fiber lasers, СО 2 lasers, Ti: Sapphire lasers, Dye lasers, and Excimer Lasers. We offer simple Erbium laser and Ytterbium laser products, as well as sophisticated laser systems with unique characteristics, based on the client’s inquiry.
We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are high-quality, high-precision, easily automated manufacturing solutions that provide repeatability and flexibility.
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