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Proceedings Article

All-fiber 194 W single-frequency single-mode Yb-doped master-oscillator power-amplifier

[+] Author Affiliations
M. D. Mermelstein, K. Brar, M. J. Andrejco, A. D. Yablon, M. Fishteyn, C. Headley III, D. J. DiGiovanni

OFS Labs.

Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68730L (February 22, 2008); doi:10.1117/12.767490
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From Conference Volume 6873

  • Fiber Lasers V: Technology, Systems, and Applications
  • Jes Broeng; Clifford Headley III
  • San Jose, CA | January 19, 2008

abstract

A four-stage all-fiber single-frequency single-mode continuous-wave (cw) master-oscillator power-amplifier (MOPA) at 1083 nm is presented. Small mode area (SMA) and large mode area (LMA) amplifier stages are mode matched with a fiber mode converter (MC) and the signal and pumps are combined with tapered fiber bundles (TFBs). The final power stage uses a LMA Yb doped SBS-suppressing fiber. A single-frequency output power of 194 W is demonstrated with optical net and slope efficiencies of 73% and 80%, respectively. Numerical simulations for the signal output power and the SBS-induced Stokes backscattered power in the 4th stage amplifier agree with the experimental results. Pulse amplifier measurements showed a 400 W peak power output that was limited by the forward output ASE. The SBS reflectivity at 400 W output was only 2.75 x 10-4.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

M. D. Mermelstein ; K. Brar ; M. J. Andrejco ; A. D. Yablon ; M. Fishteyn, et al.
"All-fiber 194 W single-frequency single-mode Yb-doped master-oscillator power-amplifier", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68730L (February 22, 2008); doi:10.1117/12.767490; http://dx.doi.org/10.1117/12.767490


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