Bragg grating add-drop optical multiplexers tor InP-based optoelectronic integrated circuits

We have recently reported the design and operation1,2 of guided wave InP based Optoelectronic Integrated Circuit (OEIC's) for optical subscriber access links. OEIC technology has the potential for achieving the functionality required in such optical terminals at low cost, as all components, and their optical interconnections, are fabricated monolithically. Our current subscriber access chip incorporates a wavelength duplexer, to coarsely separate the 1300nm and 1550nm spectral windows. As the optical access network matures extra capacity will be required for bidirectional or distributive optical circuits. Such circuits are likely to be separated by WDM or dense WDM techniques. In this paper we present results on the design and fabrication of Bragg grating optical 'add-drop' multiplexers compatible with our demonstrated OEIC subscriber access circuits. Optical filter/multiplexer bandwidths in the range > 5nm to <0.1 nm are likely to be required to separate coarse WDM through dense WDM channels.