We report on the first, to our knowledge, experimental observation of spectral Bloch oscillations in an optical fiber employing the interaction between a probe signal and a traveling-wave periodic potential. The spectrum of weak probe pulses is shown to oscillate on account of their group-velocity mismatch to the periodic field. The behavior of a cw probe spectrum reveals the actual discrete nature of the effect. Recurrences of the spectrum after one and two Bloch periods are demonstrated.
© 2009 Optical Society of America
Original Manuscript: March 24, 2009
Manuscript Accepted: June 11, 2009
Published: July 31, 2009
Christoph Bersch, Georgy Onishchukov, and Ulf Peschel, "Experimental observation of spectral Bloch oscillations," Opt. Lett. 34, 2372-2374 (2009)