US6614964B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical communication apparatus
Assignee: Sumitomo Electric Industries Ltd
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Filing: 2001-01-24
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Granted: 2003-09-02
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Expires: 2021-01-24
Abstract
Abstract A transmitting and receiving module helps reduce electrical crosstalk and noise during transmitting and/or receiving signals. Electrical isolation among metallized electrodes in a surface-mounted module with an optical fiber and an optical device can be achieved by using a low resistivity Si substrate, providing ground terminals on the surface of the Si substrate, and grounding the Si substrate. Noise and crosstalk during transmitting and receiving signals can be reduced by providing a copper contact adhered to the bottom surface of the Si substrate and by grounding.
Inventors
- 👤 Yoshiki Kuhara
- 👤 Hiromi Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4246; G02B6/4219; G02B6/4236; G02B6/4245; G02B6/4274
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
An optical communication apparatus comprising: a Si substrate having resistivity below 1 Ωcm and connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; and at least one ground terminal on the same surface of the Si substrate as the insulating layer.
Claim 2
Dependent Claim
77 words
An optical communication apparatus comprising: a Si substrate having resistivity below 1 Ωcm and connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; and at least one ground terminal on the same surface of the Si substrate as the insulating layer.
Claim 3
Dependent Claim
96 words
An optical communication apparatus comprising: a Si substrate having resistivity below 1 Ωcm and connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; electrode patterns for optical devices on the insulation layer on the surface of the Si substrate; and a ground terminal on an uninsulated surface of the Si substrate and shaped like a comb-tooth among the electrode patterns.
Claim 4
Dependent Claim
96 words
An optical communication apparatus comprising: a Si substrate having resistivity below 1 Ωcm and connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; electrode patterns for optical devices on the insulation layer on the surface of the Si substrate; and a ground terminal on an uninsulated surface of the Si substrate and shaped like a comb-tooth among the electrode patterns.
Claim 5
Dependent Claim
20 words
An optical communication apparatus according to claim 2 wherein the resistivity of the Si substrate is 0.1 Ωcm or less.
Claim 6
Dependent Claim
24 words
An optical communication apparatus according to claim 2 further comprising an optical system including an optical wave-guide in a portion of the insulating layer.
Claim 7
Dependent Claim
23 words
An optical communication apparatus according to claim 2 further comprising a metallic grounding contact adhered to a bottom surface of the Si substrate.
Claim 8
Dependent Claim
53 words
An optical communication apparatus according to claim 2 comprising: a SiO2-based wave-guide formed on the Si substrate; and a laser diode comprising InGaAsP and a photo diode comprising InGaAsP mounted on the Si substrate; wherein the apparatus is arranged for transmitting and receiving optical signals having wavelengths from 1.3 μm to 1.55 μm.
Claim 9
Dependent Claim
20 words
An optical communication apparatus according to claim 6 wherein the resistivity of the Si substrate is 0.1 Ωcm or less.
Claim 10
Dependent Claim
22 words
An optical communication apparatus according to claim 7 comprising a metallic grounding contact adhered to a bottom surface of the Si substrate.
Claim 11
Dependent Claim
22 words
An optical communication apparatus according to claim 6 wherein the Si substrate has a thickness of from 1.0 mm to 1.5 mm.
Claim 12
Dependent Claim
22 words
An optical communication apparatus according to claim 9 comprising a metallic grounding contact adhered to a bottom surface of the Si substrate.
Claim 13
Dependent Claim
22 words
An optical communication apparatus according to claim 2 comprising a copper grounding contact adhered to a bottom surface of the Si substrate.
Claim 14
Independent Claim
111 words
An apparatus comprising: a silicon substrate having a resistivity of less than 1 Ωcm and coupled to a ground potential level; an insulation layer on a portion of the surface of the silicon substrate; at least one optical device mounted on the insulation layer; at least one optical fiber positioned so that light can be transmitted between the at least one optical fiber and the at least one optical device; electrodes for the at least one optical device provided on the insulation layer; a ground terminal on an uninsulated surface of the silicon substrate extending among the electrodes; and a metallic grounding contact coupled to a surface of the silicon substrate.
Claim 15
Independent Claim
111 words
An apparatus comprising: a silicon substrate having a resistivity of less than 1 Ωcm and coupled to a ground potential level; an insulation layer on a portion of the surface of the silicon substrate; at least one optical device mounted on the insulation layer; at least one optical fiber positioned so that light can be transmitted between the at least one optical fiber and the at least one optical device; electrodes for the at least one optical device provided on the insulation layer; a ground terminal on an uninsulated surface of the silicon substrate extending among the electrodes; and a metallic grounding contact coupled to a surface of the silicon substrate.
Claim 16
Dependent Claim
20 words
The apparatus of claim 12 wherein the at least one optical device includes a laser diode and a photo diode.
Claim 17
Dependent Claim
31 words
The apparatus of claim 13 including a first optical fiber positioned to receive light from the laser diode and a second optical fiber positioned to transmit light to the photo diode.
Claim 18
Dependent Claim
77 words
The apparatus of claim 13 including a first optical wave-guide formed on the silicon substrate and positioned to receive light from the laser diode; a second wave-guide formed on the silicon substrate and positioned to guide light to the photo diode; and an optical coupler positioned to direct light from the first optical wave-guide to the at least one optical fiber and to direct light received from the at least one optical fiber to the photo diode.
Claim 19
Dependent Claim
33 words
The apparatus of claim 13 including an optical fiber positioned within a ferule that is positioned in a groove in the silicon substrate, wherein the optical fiber is aligned with the optical device.
Claim 20
Dependent Claim
90 words
An optical communication apparatus comprising: a Si substrate connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; electrode patterns for optical devices on the insulation layer on the surface of the Si substrate; and a ground terminal on an uninsulated surface of the Si substrate and shaped like a comb-tooth among the electrode patterns.
Claim 21
Dependent Claim
90 words
An optical communication apparatus comprising: a Si substrate connected to a ground potential level; an insulation layer provided at least on a portion of the surface of the Si substrate; at least one optical device selected from the group of a laser diode and a photo diode, and mounted on the insulation layer; electrode patterns for optical devices on the insulation layer on the surface of the Si substrate; and a ground terminal on an uninsulated surface of the Si substrate and shaped like a comb-tooth among the electrode patterns.
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) | 2006-09-01 | 2007-03-03 | 2007-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-01 | 2011-03-03 | 2011-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-01 | 2015-03-03 | 2015-09-02 | $7700.00 | Window Closed / Lapsed |