Abstract

Recently, a 3.5" magneto-optical disk drive has been developed for a compact data storage peripheral. In such a compact drive, a small optical head having a sufficient read out C/N ratio is necessary. Several types of compact head, using hybrid assembly technique, were proposed for a read only disk ^1),2). These optics consist of a few optical parts. A hybrid integration is used for a laser diode chip and a photodetector chip. Because the fluctuation range in optical parts position and the contributed parts number are small, stable operation is expected. For a magneto-optical disk head, however, there has been no report published on a hybrid assembly, owing to the complicated data signal detection optics required.

© 1991 Optical Society of America