Patent US5857047A successfully refreshed from Google Patents.
US5857047A
Expired / Lapsed
US
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Automated fiber pigtailing machine
Assignee: University of California
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Filing: 1996-03-20
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Granted: 1999-01-05
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Expires: 2016-03-20
Abstract
Abstract The Automated Fiber Pigtailing Machine (AFPM) aligns and attaches optical fibers to optoelectonic (OE) devices such as laser diodes, photodiodes, and waveguide devices without operator intervention. The so-called pigtailing process is completed with sub-micron accuracies in less than 3 minutes. The AFPM operates unattended for one hour, is modular in design and is compatible with a mass production manufacturing environment. This machine can be used to build components which are used in military aircraft navigation systems, computer systems, communications systems and in the construction of diagnostics and experimental systems.
Inventors
- 👤 Oliver T. Strand
- 👤 Mark E. Lowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:18
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4219; G02B6/422; G02B6/4227; G02B6/4221; G02B6/4224
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
205 words
An automated fiber pigtailing machine, comprising: means for aligning an optical fiber sufficiently close (few microns) to an optoelectronic device to couple light between said fiber and said device, wherein said means for aligning an optical fiber comprise: a first high precision stage operatively connected to said fiber optic; a second high precision stage operatively connected to said optoelectronic device; a computer system comprising memory, input/output devices and an object-recognition algorithm; a first fiducial placed on said optical fiber; a second fiducial placed on said optoelectronic device; and a camera operatively located to view said optical fiber and said optoelectronic device, wherein said camera is electrically connected to send a real time view of said optical fiber and said optoelectronic device to said computer system wherein said object-recognition algorithm locates said first fiducial and said second fiducial in space such that precise Cartesian coordinates are then generated by said object-recognition algorithm and used by said computer system to generate position commands that precisely move said optical fiber to where it needs to be to couple light to and/or from said optoelectronic device; means for maximizing the light coupled between said fiber and said device; and means for attaching said optical fiber to said optoelectronic device.
Claim 2
Dependent Claim
205 words
An automated fiber pigtailing machine, comprising: means for aligning an optical fiber sufficiently close (few microns) to an optoelectronic device to couple light between said fiber and said device, wherein said means for aligning an optical fiber comprise: a first high precision stage operatively connected to said fiber optic; a second high precision stage operatively connected to said optoelectronic device; a computer system comprising memory, input/output devices and an object-recognition algorithm; a first fiducial placed on said optical fiber; a second fiducial placed on said optoelectronic device; and a camera operatively located to view said optical fiber and said optoelectronic device, wherein said camera is electrically connected to send a real time view of said optical fiber and said optoelectronic device to said computer system wherein said object-recognition algorithm locates said first fiducial and said second fiducial in space such that precise Cartesian coordinates are then generated by said object-recognition algorithm and used by said computer system to generate position commands that precisely move said optical fiber to where it needs to be to couple light to and/or from said optoelectronic device; means for maximizing the light coupled between said fiber and said device; and means for attaching said optical fiber to said optoelectronic device.
Claim 3
Dependent Claim
51 words
The automated fiber pigtailing machine of claim 1, wherein said means for maximizing the light coupled between said fiber and said device comprise an active feedback system to perform sub-micron alignment wherein a series of peak-finding motions are performed until said light coupled between said fiber and said device is maximized.
Claim 4
Dependent Claim
27 words
The automated fiber pigtailing machine of claim 1, wherein said means for attaching said optical fiber to said optoelectronic device comprise an epoxy dispensing and curing system.
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) | 2002-01-04 | 2002-07-06 | 2003-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-04 | 2006-07-06 | 2007-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-04 | 2010-07-06 | 2011-01-05 | $7700.00 | Window Closed / Lapsed |