Abstract

In order to reduce the size of an optical head, we have proposed an on-silicon LD/PD hybrid module, which is an integration of an LD chip on a PD substrate.¹ In this module, an LD chip is mounted in front of an etched mirror. However, in the conventional structure of that module, the optical signal of a rewritable optical head was influenced by the beam front diffracted at mirror edges and the incidence of stray beams into the elements of the PD. In this paper we report on the optimization of the LD/PD hybrid structure for obtaining the LD/PD module available to hologram optical heads for rewritable optical disk systems.

© 1995 IEEE