Multiple VSEL assembly for read/write and tracking applications

Details Multiple VSEL assembly for read/write and tracking applications Multiple VSEL assembly for read/write and tracking applications

1997-02-19

1999-04-13

Edun, Muhammad N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369116, G11B 700

Patent

active

058944672

ABSTRACT:
A read/write head assembly for use in optical disk drives and the like. The head assembly includes multiple vertical surface emitting lasers (VSELs) for reading and writing the optical disk. The reading and writing functions are provided by different VSELs. The VSELs are constructed on a common substrate together with one or more photodetectors for detecting light reflected from the disk. Multiple reading assemblies, each comprising a photodetector and VSEL, may be implemented on the same substrate thereby increasing the rate at which data may be read from the disk. In addition, multiple VSELs for writing the disk may be implemented on the common substrate thereby increasing the rate at which data is written to the disk.

REFERENCES:
patent: 5619521 (1997-04-01), Tanaka
patent: 5715227 (1998-02-01), Matsumoto
patent: 5757741 (1998-05-01), Jiang et al.

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