ABSTRACT
We report a novel hybrid integrated optic device consisting of AlGaInAs/InP electroabsorption modulators and a four-arm silica-on-silicon planar lightwave circuit optical interferometer. The device is designed for generation of high spectral efficiency optical modulation formats. We demonstrate generation of 21.4 Gb/s quadrature phase shift keyed optical signals with electrical data drives of 2V(pp) amplitudes, achieving a bit error rate of 10(-9) with the required optical signal to noise ratio of ~18 dB in a 0.1 nm resolution bandwidth.
Subject(s)
Electronics/instrumentation , Models, Theoretical , Optics and Photonics/instrumentation , Signal Processing, Computer-Assisted/instrumentation , Transducers , Computer Simulation , Equipment Design , Equipment Failure Analysis , Light , Scattering, RadiationABSTRACT
We give experimental results for amplitude and phase modulation by free-carrier injection in planar and rib waveguides at a wavelength of 10.6 microm. These waveguides have been formed by metal-organic chemical-vapor deposition of InP and GalnAs layers on InP substrates. Absorptions of 95% associated with phase shifts greater than 3pi have been measured for injection-current densities below 1 A/cm(2) with a planar guiding structure and drive currents of approximately 10 mA for typical channel waveguides.
