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EP0588014A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Optical bus with optical transceiver modules and method of manufacture

Assignee: Motorola Solutions Inc
•
Filing: 1993-07-15
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Granted: —
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Expires: 2013-07-15
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Abstract

Abstract An optical bus (10) including two identical transceiver modules (12) each including transmitter and receiver circuitry and light detectors and light generators (70). The light detectors and generators (70) are coupled, optically, to the ends of an optical fiber ribbon (13) by a molded waveguide (40) and, electrically, to the transmitter or receiver by conductors (26, 31, 32) in a mounting board (25). The receiver circuitry contains a burst mode, non-linear receiver (80) and the transmitter contains CMOS circuits (38) to increase the simplicity and speed of the module.

Inventors

  • 👤 Michael S. Lebby
  • 👤 Davis H. Hartman

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 00:57
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/40; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/24; G02B6/26; G02B6/30; G02B6/42; G02B6/4201; G02B6/4246; G02B6/4249

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 578 words
An optical transceiver module characterized by: a light detector (72) having an optical input (74) and an electrical terminal (65) positioned on a first surface (75) thereof; a light generator (72) having an optical output (74) and an electrical terminal (65) positioned on a first surface (75) thereof; an optical waveguide (40) including a plurality of spaced apart light conducting cores (45) each having first and second ends optically accessible at opposite ends of the waveguide, a plurality of electrical conductors (50) each being associated with a different one of the plurality of cores (45) and having an externally accessible contact (52) positioned in a first end (55) of the waveguide adjacent the first end of the associated core (45) and an externally accessible portion (58) positioned on an external surface of the optical waveguide (40), the waveguide (40) further having a plurality of alignment ferrules (16) formed in a second end of the waveguide (40) opposite the first end (55); the light detector (72) being affixed to the end of the waveguide (40) with the optical input (74) substantially aligned with the first end of a first core (45) of the plurality of cores and the electrical terminal (65) in electrical contact with the externally accessible contact (52) of the electrical conductor (50) associated with the first core (45); the light generator (72) being affixed to the end of the waveguide (40) with the optical output (74) substantially aligned with the first end of a second core (45) of the plurality of cores and the electrical terminal (65) in electrical contact with the externally accessible contact (52) of the electrical conductor (50) associated with the second core; a first integrated circuit (36) including a transmitter with electrical input and output terminals (26, 31); a second integrated circuit (37) including a receiver with electrical input and output terminals (26, 32); an electrical interconnect and mounting board (25) including a first mounting area (27) having the optical waveguide (35) mounted thereon with the second end of the waveguide being positioned adjacent an external edge of the board and facing outwardly therefrom, a second mounting area (28) having the first integrated circuit (36) mounted thereon and including electrical conductors (31) extending from adjacent the first mounting area (27) to adjacent the second mounting area (28), and a third mounting area (29) having the second integrated circuit mounted thereon and including electrical conductors (32) extending from adjacent the first mounting area (27) to adjacent the third mounting area (29), the board (25) further including electrical input and output terminals (18); and the electrical conductors (31) extending from adjacent the first mounting area (27) to adjacent the second mounting area (28) being connected in electrical contact with the electrical output terminal of the transmitter and the externally accessible portion (58) of the electrical conductor (50) associated with the first core (45), and the electrical input terminal of the transmitter being connected in electrical contact with an input terminal (18) of the electrical interconnect and mounting board (25), the electrical conductors (32) extending from adjacent the first mounting area (27) to adjacent the third mounting area (29) being connected in electrical contact with the electrical input terminal of the receiver and the externally accessible portion (58) of the electrical conductor (50) associated with the second core (45), and the electrical output terminal of the receiver being connected in electrical contact with an output terminal (18) of the electrical interconnect and mounting board (25).
Claim 2
Dependent Claim 26 words
An optical transceiver module as claimed in claim 1 further characterized in that the light detector and light generator are provided in a single unit (70).
Claim 3
Dependent Claim 28 words
An optical transceiver module as claimed in claim 1 further characterized in that the first (36) and second (37) integrated circuits are provided on a single semiconductor chip.
Claim 4
Dependent Claim 21 words
An optical transceiver module as claimed in claim 1 further characterized in that the transmitter includes a CMOS gate circuit (38).
Claim 5
Dependent Claim 38 words
An optical transceiver module as claimed in claim 4 further characterized in that the light generator includes an ultra-low threshold laser and the CMOS gate circuit included in the transmitter is connected directly to the ultra-low threshold laser.
Claim 6
Dependent Claim 108 words
An optical transceiver module as claimed in claim 1 further characterized in that the receiver in the second integrated circuit (37) includes an input stage (82) having an input terminal (84) for receiving non-linear input signals and an output terminal supplying output signals indicative of the front and rear edges of non-linear input signals received, an amplifier (88) coupled to receive the output signals from the input stage and provide amplified output signals at an output terminal thereof, and a hysteresis stage (90) coupled to receive the amplified output signals from the output terminal of the amplifier (88) and regenerate an amplified replica of the non-linear input signals.
Claim 7
Dependent Claim 97 words
An optical transceiver module as claimed in claim 1 further characterized by a reference electrical conductor (46) formed in the optical waveguide (40) with an externally accessible contact (59) positioned in the end (60) of the waveguide (40) adjacent the first end of the core (45) and an externally accessible portion (62) positioned on an external surface of the waveguide (40) and the light detector and light generator (70) each have a reference terminal (64) positioned on the first surface (75) thereof and in contact with the externally accessible contact (55) of the reference electrical conductor (46).
Claim 8
Dependent Claim 23 words
An optical transceiver module as claimed in claim 1 further characterized in that the light generator includes a vertical cavity surface emitting laser.
Claim 9
Dependent Claim 43 words
An optical transceiver module as claimed in claim 7 further characterized in that the transmitter included in the first integrated circuit is a single gate circuit (38) with the electrical output terminal direct coupled to the electrical terminal of the light generator (39).
Claim 10
Dependent Claim 29 words
An optical transceiver module as claimed in claim 7 further characterized in that the receiver included in the second integrated circuit is a non-linear burst mode data receiver (80).

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