INTEGRABLE SEMICONDUCTOR OPTICAL CORRELATOR, PARAMETRIC SPECTROMETER FOR COMMUNICATION-SYSTEMS

A broad-band integrable waveguide correlator and parametic spectrometer is analyzed both theoretically and experimentally. The correlator can measure pulsewidths from subpicosecond to tens of picoseconds centered at wavelengths of 1.06 to 1.7-mu-m without any mechanical alignment. The parametric waveguide spectrometer is shown to not only resolve mode of a 1.3-mu-m Fabry-Perot laser diode but also the shift of the modes as a function of bias current. The improvement of these integrable waveguide structures and their possible use in laser stabilization, defining fixed frequency channels, and other applications for coherent communication systems are also discussed.