Optical modulator and optical transmission apparatus using same
US-11156857-B2 · Oct 26, 2021 · US
Optical modulator having screw-fastened protrusion
US11397341B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11397341-B2 |
| Application number | US-201916961419-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 11, 2019 |
| Priority date | Jan 12, 2018 |
| Publication date | Jul 26, 2022 |
| Grant date | Jul 26, 2022 |
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- Title
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Abstract
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An initial change and a secular change in an optical characteristic and a high frequency characteristic in a case where an optical modulator is mounted in a package of an optical transmission apparatus are suppressed while improving a space utilization rate in the package of the optical transmission apparatus. An optical modulator that is electrically connected to an electric circuit configured on a circuit board, includes: a package that houses an optical modulation element; and a signal input part or the like for inputting an electric signal for causing the optical modulation element to perform an modulation operation from the electric circuit, in which the package has, on a part of a bottom surface facing the circuit board, a first protrusion portion protruding from the bottom surface, and the signal input part is provided on an upper surface of the first protrusion portion.
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical modulator that is electrically connected to an electric circuit configured on a circuit board, the optical modulator comprising: a package that houses an optical modulation element; and a signal input part that inputs an electric signal for causing the optical modulation element to perform a modulation operation from the electric circuit, wherein the package has, on a part of a bottom surface facing the circuit board, a first protrusion portion protruding from the bottom surface, the signal input part is provided on an upper surface of the first protrusion portion, and the package has at least one screw hole, to be used to fix the first protrusion portion to the circuit board, on the upper surface of the first protrusion portion having the signal input part to which a radio frequency signal is input. 2. The optical modulator according to claim 1 , wherein the bottom surface of the package has at least one screw hole in a portion other than the first protrusion portion. 3. The optical modulator according to claim 1 , wherein the package has a second protrusion portion protruding from the bottom surface on a part of the bottom surface, and the first protrusion portion and the second protrusion portion have substantially the same height from the bottom surface. 4. The optical modulator according to claim 3 , wherein the package has at least one screw hole on an upper surface of the second protrusion portion. 5. An optical transmission apparatus comprising: the optical modulator according to claim 1 ; and the circuit board that outputs an electric signal for causing the optical modulator to perform a modulation operation. 6. The optical transmission apparatus according to claim 5 , further comprising: at least one spacer disposed between the bottom surface of the optical modulator and the circuit board and having a height equal to a height of the first protrusion portion from the bottom surface.
Assignees
Inventors
Classifications
- G02F1/2252Primary
in optical fibres · CPC title
Digital phase modulation · CPC title
using external modulation · CPC title
LiNbO3, LiTaO3 · CPC title
- G02F1/0305Primary
Constructional arrangements (G02F1/0327 - G02F1/05 take precedence) · CPC title
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- What does patent US11397341B2 cover?
- An initial change and a secular change in an optical characteristic and a high frequency characteristic in a case where an optical modulator is mounted in a package of an optical transmission apparatus are suppressed while improving a space utilization rate in the package of the optical transmission apparatus. An optical modulator that is electrically connected to an electric circuit configured…
- Who is the assignee on this patent?
- Sumitomo Osaka Cement Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02F1/2252. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 26 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).