Abstract

Integrated optical polarisation splitters are important devices in optical communication, e.g., in coherent optical detection schemes [1]. Polarisation splitters based on various materials are described in literature [2-6]. In this paper we present a polarisation splitter realised on a conventional DH InGaAsP/InP structure. Compared with a former design of the mode converting polarisation splitter [7], this device has larger polarisation splitting ratio and lower excess losses. The device based on ridge waveguides is easy to fabricate; only one etching step is required. Furthermore, this device has the advantage that no metallic layer is required [3, 5]. Finally, the fabrication tolerances of this device are relaxed compared with the classical type of polarization splitters based on interference.

© 1995 Optical Society of America