New developments in high power eye-safe LMA fibers

K. Tankala; B. Samson; A. Carter; J. Farroni; D. Machewirth; N. Jacobson; U. Manyam; A. Sanchez; M-Y. Chen; A. Galvanauskas; W. Torruellas; Y. Chen

doi:10.1117/12.646663

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23 February 2006 New developments in high power eye-safe LMA fibers

K. Tankala, B. Samson, A. Carter, J. Farroni, D. Machewirth, N. Jacobson, U. Manyam, A. Sanchez, M-Y. Chen, A. Galvanauskas, W. Torruellas, Y. Chen

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Proceedings Volume 6102, Fiber Lasers III: Technology, Systems, and Applications; 610206 (2006) https://doi.org/10.1117/12.646663
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

In this paper we present advances made in the development and fabrication of highly efficient, large-mode area fibers for eye-safe wavelengths (1.55 μm, 2.0 μm). LMA Er/Yb co-doped and Tm doped fibers have been successfully fabricated, with 25 μm core and 250 to 300 μm clad diameters, that are suitable for nanosecond pulsed amplification in LIDAR applications as well as high power CW amplification. Manufacturing challenges for these novel fibers are discussed. Measured and modeled data, for both types of fibers, are presented. The development of non-PM and PM-LMA fibers for eye-safe applications is expected to spur rapid progress in power scaling at these wavelengths, similar to that witnessed by the industry at 1.06 μm.

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K. Tankala, B. Samson, A. Carter, J. Farroni, D. Machewirth, N. Jacobson, U. Manyam, A. Sanchez, M-Y. Chen, A. Galvanauskas, W. Torruellas, and Y. Chen "New developments in high power eye-safe LMA fibers", Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 610206 (23 February 2006); https://doi.org/10.1117/12.646663

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