US5214726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain isolated integrated optic chip package
Assignee: Viavi Solutions Inc
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Filing: 1991-10-07
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Granted: 1993-05-25
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Expires: 2011-10-07
Abstract
Abstract A package for an IOC fabricated from an anisotropic material, such as X-cut lithium niobate or lithium tantalate, having identical thermal expansion coefficients in the X and Y directions and a different thermal expansion in the Z direction, or for an IOC fabricated from an isotropic material, such as gallium arsenide or silicon, includes an IOC enclosure having a planar mounting surface which has identical thermal expansion coefficients in the X and Y directions. The coefficients of the planar mounting surface are relatively similar to the thermal expansion coefficients of a planar surface of the IOC. A planar surface of the IOC is attached to the planar mounting surface of the package.
Inventors
- 👤 Bruce D. Hockaday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:25
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/008; G02B6/00; G02B6/24; G02B6/26; G02B6/30
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
Apparatus, comprising: a integrated optic chip, having a waveguide formed on, or imbedded in, a major surface, and having one or more planar side surfaces; a housing, fabricated from a material having isotropic thermal expansion coefficients, having a planar pedestal mounting surface fabricated therein, said integrated optic chip being mounted within said housing such that one of said one or more planar side surfaces is mounted to said planar pedestal mounting surface.
Claim 2
Dependent Claim
72 words
Apparatus, comprising: a integrated optic chip, having a waveguide formed on, or imbedded in, a major surface, and having one or more planar side surfaces; a housing, fabricated from a material having isotropic thermal expansion coefficients, having a planar pedestal mounting surface fabricated therein, said integrated optic chip being mounted within said housing such that one of said one or more planar side surfaces is mounted to said planar pedestal mounting surface.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1, wherein said one of said one or more planar side surfaces is mounted to said planar pedestal mounting surface with a compliant material.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1, wherein said housing comprises a tubular-shaped housing, having an opening formed therein for access to said integrated optic chip.
Claim 5
Dependent Claim
32 words
The apparatus of claim 3, further comprising an outer cylindrical-shaped tube, disposed to cover said housing so as to form a hermetic seal for said integrated optic chip disposed within said housing.
Claim 6
Dependent Claim
24 words
The apparatus of claim 3, further comprising a viscous material disposed to fill a portion of all of any air space within said housing.
Claim 7
Dependent Claim
42 words
The apparatus of claim 1, further comprising one or more optical fibers, each of said fibers being disposed within said housing and being connected to a predetermined location on said integrated optical chip at said waveguide and being connected to said housing.
Claim 8
Dependent Claim
57 words
The apparatus of claim 6, wherein each of said one or more optical fibers is conformed to a relatively curved path so as to allow for movement of said fiber due to thermal expansion and mechanical bending of said housing without disturbing the integrity of said fiber connections to said integrated optic chip and to said housing.
Claim 9
Dependent Claim
23 words
The apparatus of claim 1, further comprising a thermal coefficient transformer disposed between said planar side surface and said pedestal planar mounting surface.
Claim 10
Dependent Claim
13 words
The apparatus of claim 8, wherein said thermal coefficient transformer comprises anisotropic material.
Claim 11
Dependent Claim
12 words
The apparatus of claim 9, wherein said anisotropic material comprises pyrolytic graphite.
Claim 12
Dependent Claim
11 words
The apparatus of claim 9, wherein said anisotropic material comprises calcite.
Claim 13
Dependent Claim
12 words
The apparatus of claim 9, wherein said anisotropic material comprises barium titanate.
Claim 14
Dependent Claim
12 words
The apparatus of claim 9, wherein said anisotropic material comprises crystal quartz.
Claim 15
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises anisotropic material, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 16
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises isotropic material, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 17
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises lithium niobate, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 18
Dependent Claim
31 words
The apparatus of claim 1, wherein said integrated optic chip comprises X-cut lithium niobate, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 19
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises lithium tantalate, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 20
Dependent Claim
31 words
The apparatus of claim 1, wherein said integrated optic chip comprises X-cut lithium tantalate, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 21
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises gallium arsenide, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 22
Dependent Claim
31 words
The apparatus of claim 1, wherein said integrated optic chip comprises X-cut gallium arsenide, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 23
Dependent Claim
29 words
The apparatus of claim 1, wherein said integrated optic chip comprises silicon, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
Claim 24
Dependent Claim
30 words
The apparatus of claim 1, wherein said integrated optic chip comprises X-cut silicon, each of said one or more planar side surfaces having identical thermal expansion coefficients in each direction.
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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |