Dispersion compensation for a photorefractive self-pumped phase conjugator with femtosecond pulses is analyzed. The self-pumped phase conjugator consists of a pair of dynamic gratings coupled by total internal reflections at the crystal surfaces (cat conjugator). The negative angular dispersions of refraction at the air–crystal interface and the gratings inside the crystal compensate for the positive dispersion of the finite crystal path. The experimental results show that with partial dispersion compensation the width of the self-pumped phase conjugation at 450 nm of femtosecond pulses is narrower than that of the transmitted pulses.
© 1999 Optical Society of America
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(070.5040) Fourier optics and signal processing : Phase conjugation
(320.2250) Ultrafast optics : Femtosecond phenomena
Changxi Yang, "Dispersion compensation for a femtosecond self-pumped phase conjugator," Opt. Lett. 24, 31-33 (1999)