Monolithic narrow linewidth pulsed fiber laser transmitters in the C- and L-band for coherent LIDAR applications

摘要

In summary, we have successfully fabricated large core SM PM highly Er/Yb co-doped phosphate glass fibers 25/400 and 30/250. By using these new specialty fibers in the 2nd power amplifier stage, we have achieved the highest peak power of 2.02 kW for 105 ns pulses at 1530 nm with transform-limited linewidth; the corresponding pulse energy is about 0.212 mJ, which is the highest value for monolithic fiber laser pulses with longer ns pulse width and transform-limited linewidth.