Title :
The distributed feedback waveguide modulator
Author :
Gomatam, Badri N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
Abstract :
A novel waveguide electroabsorption modulator structure is proposed. In this structure, the resonator properties of a quarter-wave phase-shifted grating are combined with the electroabsorption properties of a multiple-quantum-well (MQW) waveguide. The theory and design considerations for such a distributed feedback MQW modulator are discussed. The performance characteristics of this structure are studied theoretically and compared with conventional MQW waveguide modulators. It is found that increased modulation bandwidth and reasonable optical bandwidths can be obtained over a device without feedback, and design tradeoffs are identified and explored.<>
Keywords :
diffraction gratings; electro-optical devices; electroabsorption; feedback; integrated optics; optical modulation; optical resonators; optical waveguides; MQW waveguide modulators; distributed feedback MQW modulator; distributed feedback waveguide modulator; increased modulation bandwidth; modulator design; optical bandwidths; performance characteristics; quarter-wave phase-shifted grating; resonator properties; waveguide electroabsorption modulator structure; Bandwidth; Distributed feedback devices; Gratings; Optical devices; Optical feedback; Optical modulation; Optical resonators; Optical waveguide theory; Optical waveguides; Quantum well devices;
Journal_Title :
Photonics Technology Letters, IEEE
