A new type of pulsed (picosecond) nonlinear optical logic element, that exploits polarisation dichroism, is proposed and investigated experimentally. The device is based on a nonlinear Fabry-Pérot cavity and excite/probe operation. Unlike previous similar devices, it operates at a single wavelength and uses band-edge dichroism to distinguish the excite and probe pulses according to their polarisation. The concept has been tested using CdS as the dichroic nonlinear material and differential gain levels greater than unity have been observed. Experimental data are also included regarding the magnitudes of the nonlinear refractive cross-section and other relevant parameters in CdS. © 1992.
|Number of pages||8|
|Publication status||Published - 15 Jun 1992|