US4834485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated fiber optics transmitter/receiver device
Assignee: Pencom International Corp
•
Filing: 1988-01-04
•
Granted: 1989-05-30
•
Expires: 2008-01-04
Abstract
Abstract An integrated transmitter/receiver system which uses a hybrid component for both the light source and the light detector, with holographic optical elements for dividing the light beam into two or more beams. The hybrid component contains a laser diode and a detector mounted on the same mechanical structure. This invention allows the placement of all the components substantially along a single optical axis. This arrangement reduces alignment problems and vibrational errors.
Inventors
- 👤 Wai-Hon Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/40; H04J; H04J14/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
87 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; at least one photodetector; a diffraction grating disposed between said laser beam source and said fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a diffracted beam to hit said photodetector; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beam onto said photodetector.
Claim 2
Dependent Claim
87 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; at least one photodetector; a diffraction grating disposed between said laser beam source and said fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a diffracted beam to hit said photodetector; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beam onto said photodetector.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 further comprising a second photodetector for receiving a second diffracted beam from said diffraction grating, said first-mentioned and second photodetectors being mounted on opposing sides of said laser beam source.
Claim 4
Dependent Claim
55 words
The apparatus of claim 1 wherein said laser beam source is mounted at an angle to an optical axis through said lens means, said diffraction grating and said end of said fiber optic cable, said photodetector being mounted at an identical angle to said optical axis on an opposite side from said laser beam source.
Claim 5
Independent Claim
15 words
The apparatus of claims 2 or 3 wherein said lens means is a single lens.
Claim 6
Independent Claim
47 words
The apparatus of claims 2 or 3 wherein said lens means comprises first and second collimating lenses, said first lens being positioned between said laser beam source and said diffraction grating, and said second collimating lens being positioned between said diffraction grating and said fiber optic cable.
Claim 7
Independent Claim
16 words
The apparatus of claims 2 or 3 wherein said laser beam source comprises a laser diode.
Claim 8
Independent Claim
16 words
The apparatus of claims 2 or 3 wherein said diffraction grating is a holographic diffraction grating.
Claim 9
Independent Claim
17 words
The apparatus of claims 2 or 3 wherein said diffracted beam is a first order diffracted beam.
Claim 10
Dependent Claim
18 words
The apparatus of claim 3 wherein said diffraction grating is constructed to suppress a 0 order diffraction beam.
Claim 11
Dependent Claim
130 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; a first photodetector located on a first side of said laser beam source; a second photodetector mounted on an opposing side of said laser beam source from said first photodetector; a holographic diffraction grating disposed between said laser beam source and the fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a first 1st order diffraction beam to hit said first photodetector and a second 1st order diffraction beam to hit said second photodetector; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beams onto said photodetectors.
Claim 12
Dependent Claim
130 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; a first photodetector located on a first side of said laser beam source; a second photodetector mounted on an opposing side of said laser beam source from said first photodetector; a holographic diffraction grating disposed between said laser beam source and the fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a first 1st order diffraction beam to hit said first photodetector and a second 1st order diffraction beam to hit said second photodetector; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beams onto said photodetectors.
Claim 13
Dependent Claim
131 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; a photodetector; a holographic diffraction grating disposed between said laser beam source and said fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a first order diffraction beam to hit said photodetector, said holographic diffraction grating being constructed to suppress a 0 order beam; lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beam onto said photodetector; and said laser beam source and said photodetector being mounted at identical angles to an optical axis through said lens means, said diffraction grating and said end of said fiber optic cable.
Claim 14
Dependent Claim
131 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam; a photodetector; a holographic diffraction grating disposed between said laser beam source and said fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause a first order diffraction beam to hit said photodetector, said holographic diffraction grating being constructed to suppress a 0 order beam; lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beam onto said photodetector; and said laser beam source and said photodetector being mounted at identical angles to an optical axis through said lens means, said diffraction grating and said end of said fiber optic cable.
Claim 15
Dependent Claim
125 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam along a single optical axis; first and second photodetectors placed along substantially the same single optical axis on which the laser beam source is located in substantially the same plane as said laser beam sources on opposite sides of said laser beam source; a diffraction grating disposed between said laser beam source and the fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause diffracted beams to hit said photodetectors; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beams onto said photodetectors.
Claim 16
Dependent Claim
125 words
A transmitter/receiver for coupling to an end of a fiber optic cable, comprising: a laser beam source for generating a source laser beam along a single optical axis; first and second photodetectors placed along substantially the same single optical axis on which the laser beam source is located in substantially the same plane as said laser beam sources on opposite sides of said laser beam source; a diffraction grating disposed between said laser beam source and the fiber optic cable for diffracting a beam from said end of said fiber optic cable to cause diffracted beams to hit said photodetectors; and lens means for converging said source laser beam onto said end of said fiber optic cable and converging said diffracted beams onto said photodetectors.
Claim 17
Dependent Claim
32 words
The apparatus of claim 12 wherein the laser beam source is positioned along the optical axis and the photodetectors are approximately 1 mm from said laser beam source off the optical axis.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |