Abstract

The electrooptic modulators (EOMs), which contain the liquid-filled capillary optical fiber (OF), are very attractive as model systems in the investigation of the light manipulations in nonlinear waveguides and in the various fiber-based sensors. The marked properties of liquid-filled OF are the ideal step-index profile in a core and the possibility of mode content variation due to change of the core temperature. Moreover, there is a great number of the neat organic liquids with strongly different nonlinearities, which are suitable to these investigations. The key problem discussed is the role of real and imaginary components of the third- order susceptibility of the liquid core during the light pulse handling in the EOM by the external electric field. In the present paper the experimental results of an effective manipulation by the spatial, temporal, and spectral content for the picosecond light pulses (λ = 0,53 µm, Δt = 35 ps, P = 0,1 – 10⁴W) in the EOM were demonstrated. The typical dimensions of the inner core diameter and the capillary length were 50 µm and a few centimeters correspondingly. As a rule, the liquid derivatives of benzene and halogen-substituted methanes were used to hollow-core filling. The pulse energy and the spectra were registered in an ordinary manner. The amplitude and temporal characteristics of the ultrashort light pulses were measured using the streak camera with picosecond time resolution.

© 1994 IEEE