Abstract

We report on wavelength shifting in a polydiacetylene -poly(3-BCMU)- planar waveguide. The effect, of relevance in the manipulation of optical signals, is obtained through nearly-degenerate frequency mixing (NDFM) and is based on the nonresonarit third order nonlinearity of the polymer. Starting from a pulse s at frequency ω_s, the generation of the frequency-shifted pulse f at ω_f and the simultaneous amplification of s occur at the expenses of the pump p according to the relation ω_p + ω_p = ω_s+ ω_f. We define as the “conversion efficiency” η the ratio of the energy of pulse f at the output to s at the input.

© 1998 IEEE