Abstract

The AlGaInP visible semiconductor laser diode is a key device for high density optical disk memory and laser beam printers. In these cases, small beam astigmatism is an essential property in improving focusing performance, Recently, a 2-μm beam astigmatism was reported for a AlGaInP laser using a self-aligned slab waveguide structure.¹ The beam astigmatism of a self-aligned buried-ridge waveguide structure, widely used in AlGaInP laser diodes, >5 μm (Ref. 2) and varies with the output power.

© 1992 Optical Society of America