US4838630A
Expired / Lapsed
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Holographic planar optical interconnect
Assignee: Sanwa Bank California
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Filing: 1987-12-21
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Granted: 1989-06-13
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Expires: 2007-12-21
Abstract
Abstract An optical interconnect employing planar volume Bragg hologram technology in two dimensions comprises a dichromated gelatin planar volume Bragg hologram (22) disposed in a glass planar optical path (24). Multiplexed Bragg plane sets selectively diffract information-bearing light signals such as voice, image, or computer data signals in a VLSI system from a laser diode or LED source (26) coupled to the planar optical path (24) toward high-speed photodiodes. The holographic planar optical interconnect can interconnect up to 1000 different signals between VLSI microelectronic components and systems.
Inventors
- 👤 Tomasz P. Jannson
- 👤 Joanna L. Jannson
- 👤 Peter C. Yeung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:07
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G02B6/00; G02B6/24; G02B6/42; G02B6/43
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
49 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, and a planar volume Bragg hologram disposed in the planar optical path, the Bragg hologram comprising Bragg surfaces which diffract the planar light waves from the input portion to the output portion.
Claim 2
Dependent Claim
49 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, and a planar volume Bragg hologram disposed in the planar optical path, the Bragg hologram comprising Bragg surfaces which diffract the planar light waves from the input portion to the output portion.
Claim 3
Dependent Claim
16 words
The invention as defined in claim 1, wherein the Bragg hologram is made of dichromated gelatin.
Claim 4
Dependent Claim
16 words
The invention as defined in claim 1, wherein the planar optical path is made of glass.
Claim 5
Dependent Claim
38 words
The invention as defined in claim 1, wherein both the planar optical path and the planar volume Bragg hologram comprise the same optical material and wherein the material in the area of the Bragg hologram is additionally sensitized.
Claim 6
Dependent Claim
29 words
The invention as defined in claim 1, wherein the hologram comprises curved Bragg surfaces which focus and diffract the light waves from the input portion to the output portion.
Claim 7
Dependent Claim
31 words
The invention as defined in claim 1, wherein the planar Bragg hologram comprises sets of Bragg planes which diffract a single wavelength clock signal to discrete locations in the output portion.
Claim 8
Dependent Claim
37 words
The invention as defined in claim 1 wherein the planar Bragg hologram comprises sets of Bragg planes which diffract each component wavelength of light in a multiplexed multi-wavelength light signal to discrete locations in the output portion.
Claim 9
Dependent Claim
101 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, means for coupling 3-D light waves incident the input portion into the planar optical path and transforming the 3-D light waves into planar light waves, a planar volume Bragg hologram disposed in the planar optical path, the hologram comprising Bragg surfaces which diffract the planar light waves from the input portion to the output portion, and means for transforming the diffracted planar light waves at the output portion into 3-D light waves and coupling the 3-D light waves out of the planar optical path.
Claim 10
Dependent Claim
101 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, means for coupling 3-D light waves incident the input portion into the planar optical path and transforming the 3-D light waves into planar light waves, a planar volume Bragg hologram disposed in the planar optical path, the hologram comprising Bragg surfaces which diffract the planar light waves from the input portion to the output portion, and means for transforming the diffracted planar light waves at the output portion into 3-D light waves and coupling the 3-D light waves out of the planar optical path.
Claim 11
Dependent Claim
20 words
The invention as defined in claim 8, wherein the means for coupling and transforming is a total internal reflection hologram.
Claim 12
Dependent Claim
20 words
The invention as defined in claim 8, wherein the means for transforming and coupling is a total internal reflection hologram.
Claim 13
Dependent Claim
74 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, a source of 3-D light waves, functionally connected to the input portion, a planar volume Bragg hologram disposed in the planar optical path, the Bragg hologram comprising Bragg surfaces which diffract the light waves from the input portion to the output portion, and means for detecting the diffracted planar light waves functionally connected to the output portion.
Claim 14
Dependent Claim
74 words
An optical interconnect comprising a planar optical path for planar light waves, having input and output portions, a source of 3-D light waves, functionally connected to the input portion, a planar volume Bragg hologram disposed in the planar optical path, the Bragg hologram comprising Bragg surfaces which diffract the light waves from the input portion to the output portion, and means for detecting the diffracted planar light waves functionally connected to the output portion.
Claim 15
Dependent Claim
23 words
The invention as defined in claim 11, wherein the signal light source is not located in the plane of the planar optical path.
Claim 16
Dependent Claim
15 words
The invention as defined in claim 11, wherein the means for detecting is a photodiode.
Claim 17
Dependent Claim
21 words
The invention as defined in claim 11, wherein the means for detecting is not in the plane of the optical path.
Claim 18
Dependent Claim
16 words
The invention as defined in claim 11, wherein the signal light source is a laser diode.
Claim 19
Dependent Claim
15 words
The invention as defined in claim 11, wherein the signal light source is an LED.
Claim 20
Dependent Claim
75 words
An optical interconnect comprising a plurality of spaced, parallel planar optical paths for the propagation of planar light waves, each having input and output portions, and means disposed in each planar optical path for diffracting the planar light waves from the input portion to the output portion of a planar optical path and for diffracting the planar light waves from the means in one planar optical path to the means in another planar optical path.
Claim 21
Dependent Claim
75 words
An optical interconnect comprising a plurality of spaced, parallel planar optical paths for the propagation of planar light waves, each having input and output portions, and means disposed in each planar optical path for diffracting the planar light waves from the input portion to the output portion of a planar optical path and for diffracting the planar light waves from the means in one planar optical path to the means in another planar optical path.
Claim 22
Dependent Claim
99 words
In a system containing a plurality of VLSI integrated components, means for functionally interconnecting the components comprising a planar optical path containing the components thereon, means for converting the electronic signals generated by the components to light signals, input means for coupling the light signals into the planar optical path, output means for coupling the light signals out of the planar optical path, planar volume holographic means for diffracting the light signals from the input means to the output means, and means for converting the light signals at the output means into electronic signals for use by the components.
Claim 23
Dependent Claim
99 words
In a system containing a plurality of VLSI integrated components, means for functionally interconnecting the components comprising a planar optical path containing the components thereon, means for converting the electronic signals generated by the components to light signals, input means for coupling the light signals into the planar optical path, output means for coupling the light signals out of the planar optical path, planar volume holographic means for diffracting the light signals from the input means to the output means, and means for converting the light signals at the output means into electronic signals for use by the components.
Claim 24
Independent Claim
85 words
A method of interconnecting electronic signals generated by a plurality of VLSI integrated components comprising converting the electronic signals to light signals, coupling the light signals into a planar optical path, diffracting the coupled light signals in a planar volume Bragg hologram recorded with a plurality of Bragg plane sets, and disposed in the planar optical path, coupling the diffracted light signals out of the planar optical path and converting the decoupled light signals to electronic signals, and routing the electronic signals to VLSI components.
Claim 25
Independent Claim
85 words
A method of interconnecting electronic signals generated by a plurality of VLSI integrated components comprising converting the electronic signals to light signals, coupling the light signals into a planar optical path, diffracting the coupled light signals in a planar volume Bragg hologram recorded with a plurality of Bragg plane sets, and disposed in the planar optical path, coupling the diffracted light signals out of the planar optical path and converting the decoupled light signals to electronic signals, and routing the electronic signals to VLSI components.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |