Patent Number: 6,166,756

Title: Multiple channel data writing device

Abstract: An integrated optoelectronic chip 116 produces multiple modulatable outputs in a read write head. An array of light guides in a light guide switchyard has some terminations at output apertures and some at beam dumps within the read/write head. The beam dumps absorb and dissipate any light conveyed to them. The beam switches allow control of the direction of light emitted from an on-board laser 106 which enters the array of light guides. By switching between a respective beam dump and a respective output aperture, the beam switch is used to modulate the output from the aperture. The light emitted can be imaged onto a target surface by a lens system or a single holographic element. In an alternative embodiment, instead of dumping the light to a beam dump, it can also be directed away from the target surface. An optoelectronic chip for modulating multiple outputs can be formed without an embedded laser. Instead, a separate laser may be connected to a chip having light guides, optoelectronic switches, and beam dumps, only.

Inventors: White; Robert Courtney (Fairfax, VA), Drobot; Adam Thomas (Annandale, VA), Wyeth; Newell Convers (Oakton, VA), Green; Albert Myron (Alexandria, VA)

Assignee: Science Applications International Corporation

International Classification: G11B 7/12 (20060101); G11B 7/00 (20060101); G11B 7/0033 (20060101); G11B 7/14 (20060101); B41J 002/47 ()

Expiration Date: 12/26/2017