<title>Advances in monolithic InP grating-based WDM components</title>

Abstract

This paper reviews the state-of-the-art of monolithic integration of InP grating-based WDM components. We will discuss the two basic types of InP integrated wavelength demultiplexers: the etched reflection grating spectrograph and the phased-array demultiplexer. They will be compared in terms of their performance and ease of fabrication. Current trends and examples of integration with active components will be presented. In addition, the crucial issue of the wavelength precision of these devices will be addressed.