 Metal silicide texturizing technique |
| The present invention is a process for texturizing a semiconductive material coated with a metal ... |
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| Multilayer interconnection structure for a semiconductor device |
| In view of the foregoing, an object of the present invention is to provide an interconnection ... |
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| Method for production of SOI transistor device having a storage cell |
| A first object of the present invention is to provide a method of production of an SOI transistor ... |
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| Planar waveguides |
| An object of the invention is to minimise or to overcome these advantages. A further object of the ... |
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| Semiconductor integrated circuit arrangement fabrication method |
| What is claimed is: 1. An integrated circuit device fabrication method, comprising the following ... |
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| Silicon layer having increased surface area and method for manufacturing |
| A silicon layer having an increased surface area in a highly granulated form, and a method for ... |
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| Process for forming a thin oxide layer |
| A process for fabricating a high integrity silicon dioxide layer is described. The oxide formed can ... |
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| Planarization process for wide trench isolation |
| It is a primary object of this invention to provide an improved method for planarizing wide ... |
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Optical digital memory system
| Details |
Inventors: Edelman, Seymour;
Assignee:
Primary Examiner: Ullah; Akm E.
Assistant Examiner:
Attorney, Agent or Firm: Birch, Stewart, Kolasch & Birch
An optical memory having a light valve for each memory bit. Each bit is programmed in a WRITE mode to pass or inhibit optical energy emitted from a local source of illumination and thus store a binary value of "1" or "0". A short length of optical fiber guides light from the light valve in a READ mode to the core of a transmission fiber which acts as a series transmission line for an optical pulse sequence when each of a plurality of the light valves is illuminated by a respective optical source, e.g., a light emitting diode. An optical energy absorbing termination is located at one end of the series transmission fiber while an optical amplifier device is located at the opposite or output end and, where necessary in between, with the amplified pulse sequence from the transmission fiber being thereafter coupled to one or more individual optical receiver and transducer units which generate respective corresponding electrical utilization signals. |
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DETAILED DESCRIPTION OF THE INVENTION Referring now to the drawings wherein like reference numerals refer to like components throughout, reference is first made to FIG.
1.
Shown thereat is a simplified block diagram depicting the inventive concept of the subject invention including, among other things, a binary signal transmission line assembly 9 including an optical fiber transmission line 10, the details of which are shown in FIG.
2, and which will be subsequently considered.
The optical transmission line 10 is shown receiving optical energy from a plurality of light modules 11.
sub.
1, 11.
sub.
2 .
.
.
11.
sub.
n including respective optical fiber or liquid crystal optical coupler elements 12.
sub.
1, 12.
sub.
2, .
.
.
12.
sub.
n which are located adjacent a respective number of bistable optical light valves 14.
sub.
1, 14.
sub.
2, .
.
.
14.
sub.
n.
The light valves are electrically set in one of two stable binary states, i.
e.
light transmissive or light inhibiting, during a WRITE mode.
Behind each of the light valves 14.
sub.
1 .
.
.
14.
sub.
n is a respective source of illumination 16.
sub.
1, 16.
sub.
2, .
.
.
16.
sub.
n which is adapted to be energized during a READ mode.
Upon energization of the light sources 16.
sub.
1, .
.
.
16.
sub.
n, light energy will be coupled in the form of light pulses to the optical transmission line 10 depending upon the state of the bistable light valves 14.
sub.
1 .
.
.
14.
sub.
n where a particular light valve, for example, valve 14.
sub.
1, is set to a transmissive state, a light pulse, i.
e.
a binary "1", will be transmitted to the optical fiber transmission line 10 via the coupler 12.
sub.
1.
If on the other hand the light valve 14.
sub.
2 is set into a light blocking state, light energy from the source 16.
sub.
2 will be inhibited and no pulse will be coupled to the transmission line 10 via the optical coupler 12.
sub.
2 and being indicative of a binary "0" as shown.
Accordingly, a series of optical pulses or the absence thereof coupled to the optical fiber output transmission line 10 comprises a multibit digitally coded optical pulse train which is fed to one end thereof which may be coupled to an output light amplifier apparatus 18
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