Vertical cavity surface emitting laser with phase shift mask

Details Vertical cavity surface emitting laser with phase shift mask Vertical cavity surface emitting laser with phase shift mask

1997-07-17

1999-06-29

Bovernick, Rodney

Coherent light generators

Particular resonant cavity

Distributed feedback

372 45, 372 46, 372 50, 372 29, 372 92, H01S 3085

Patent

active

059178485

ABSTRACT:
A vertical cavity surface emitting laser (VCSEL) with an integrated phase shift mask for use in an optical pickup head for high density optical storage applications and a method of fabrication. The VCSEL is capable of emitting a power output of at least 10 mW. The phase shift mask is integrated with the VCSEL to allow for a 180.degree. shift in light emitted therethrough, thereby creating a reduced focal spot size for high density data write applications. The VCSEL with integrated phase shift mask is utilized in an optical pickup head capable of high density read and write applications for both CDs and DVDs.

REFERENCES:
patent: 4805176 (1989-02-01), Botez et al.
patent: 5493577 (1996-02-01), Choquette et al.
patent: 5732101 (1998-03-01), Shin

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