We demonstrate the capability for amplification of picosecond pulses in two bismuth-doped alumosilicate fibers. A spectrally filtered supercontinuum source is used to provide a train of picosecond pulses at discrete wavelengths within the gain bandwidth of bismuth fiber amplifiers. With a 30 m length of active fiber, a small signal gain at 1160 nm of over 20 dB is observed. In addition, we assess the viability of amplification of high repetition rate signals in such amplifiers, applying a 10 GHz modulation to a continuous wave Raman fiber laser operating at 1178 nm, finding that such signals are amplified without noticeable distortion.
© 2011 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: February 18, 2011
Manuscript Accepted: March 7, 2011
Published: April 13, 2011
B. H. Chapman, E. J. R. Kelleher, K. M. Golant, S. V. Popov, and J. R. Taylor, "Amplification of picosecond pulses and gigahertz signals in bismuth-doped fiber amplifiers," Opt. Lett. 36, 1446-1448 (2011)