We demonstrate electro-optic frequency shifting of 1.55-μm optical pulses by as much as 86 GHz in a polymer traveling-wave phase modulator. The optical pulses were modulated with the linear region of quasi-sinusoidal microwave pulses. In the implemented configuration the electro-optic frequency shifter does not require synchronization with the source of the optical pulses, making it transparent to the optical-pulse repetition rate and increasing its utility. Electro-optic frequency conversion has a number of advantages compared with other methods of all-optical frequency conversion, including no need for a second optical source, high conversion efficiency, and simple control of the output frequency.
© 2003 Optical Society of America
(060.5060) Fiber optics and optical communications : Phase modulation
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(230.2090) Optical devices : Electro-optical devices
(230.7020) Optical devices : Traveling-wave devices
(250.2080) Optoelectronics : Polymer active devices
Ilya Y. Poberezhskiy, Bartosz J. Bortnik, Seong-Ku Kim, and Harold R. Fetterman, "Electro-optic polymer frequency shifter activated by input optical pulses," Opt. Lett. 28, 1570-1572 (2003)