4 March 2015 Theoretical treatment of modal instability in high-power cladding-pumped Raman amplifiers
Author Affiliations +
Cladding-pumped Raman fiber amplifiers (RFA) have been proposed as gain media to achieve power scaling. It is well-known that the onset of the modal instability (MI) phenomenon is a limiting factor for achieving higher output powers in Yb-doped fiber amplifiers with good beam quality. In this paper, we present an analytical approach to the investigation of the MI phenomenon in high-power, cladding-pumped RFAs. By utilizing the conservation of the number of photons and the conservation of energy in the absence of loss, the nonlinear equations for the propagation of the pump power and the total signal power can be decoupled from one another. Decoupling lead to exact solutions for the pump power and transverse modes signal powers. Further we investigate various MI suppression techniques including increasing the seed power and gain-tailored design.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shadi Naderi, Shadi Naderi, Iyad Dajani, Iyad Dajani, Jacob Grosek, Jacob Grosek, Timothy Madden, Timothy Madden, "Theoretical treatment of modal instability in high-power cladding-pumped Raman amplifiers", Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93442X (4 March 2015); doi: 10.1117/12.2083038; https://doi.org/10.1117/12.2083038


The impact of RIN transfer on the optimization of bi...
Proceedings of SPIE (January 27 2006)
High peak power fiber laser based on a non filamented...
Proceedings of SPIE (February 21 2017)
Progress on high-power Yb, Tm and Raman fiber lasers
Proceedings of SPIE (May 03 2018)
Advances in holey fibers
Proceedings of SPIE (July 02 2003)
From S to C band amplification in a depressed...
Proceedings of SPIE (April 16 2006)
Fabrication method for LMA multi cald Yb doped silica PM...
Proceedings of SPIE (October 14 2010)

Back to Top