Optical switch
US-9467755-B2 · Oct 11, 2016 · US
Optical Switch
US2016286288A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016286288-A1 |
| Application number | US-201414778041-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 28, 2014 |
| Priority date | Nov 8, 2013 |
| Publication date | Sep 29, 2016 |
| Grant date | — |
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Abstract
Official abstract text for this publication.
An optical switch with a flat transmission property is provided. The optical switch includes an input port, an output port, a diffractive grating configured to perform wavelength demultiplexing on an optical signal from the input port, and LCOS configured to deflect the wavelength-demultiplexed optical signal to the output port. The diffractive grating is pre-arranged such that a shape of the optical signal as entering the LCOS is asymmetric with respect to an axis in the LCOS surface that is orthogonal to a wavelength axis of the diffractive grating.
First claim
Opening claim text (preview).
1 . An optical switch comprising: at least one input port; at least one output port; a wavelength demultiplexing section configured to perform wavelength demultiplexing on an optical signal from the input port; and a spatial light modulating section configured to deflect the wavelength-demultiplexed optical signal to the output port, and wherein the wavelength demultiplexing section is pre-arranged such that a shape of the optical signal of entering the spatial light modulating section is asymmetric with respect to an axis in the surface of the spatial light modulating section, the axis being orthogonal to a wavelength axis of the wavelength demultiplexing section. 2 . The optical switch according to claim 1 , wherein the spatial light modulating section is a spatial phase modulating element with a plurality of pixels. 3 . The optical switch according to claim 1 , wherein an intensity distribution corresponding to a monochromatic component forming the optical signal entering the spatial light modulating section is set such that a ridge line resulting from joining of maximum points of the intensity distribution is distributed with respect to the wavelength axis. 4 . The optical switch according to claim 1 , wherein the optical signal includes a principal ray and a marginal ray, and the wavelength demultiplexing section is arranged such that the principal ray and the marginal ray are incident at different angles. 5 . The optical switch according to claim 1 , wherein the optical switch comprises a lens having optical power only in a direction of a switch axis, the switch axis being an axis in the surface of the spatial light modulating section, and the lens is provided between the wavelength demultiplexing section and the spatial light modulator. 6 . The optical switch according to claim 1 , wherein a control pattern for the spatial light modulating section is set according to channel boundaries for a wavelength division multiplexing signal.
Assignees
Inventors
Classifications
- H04Q11/0003Primary
Details · CPC title
the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device (MEMS devices in general B81B; manufacture of MEM devices in general B81C; micromechanical devices controlling the direction of light G02B26/0833) · CPC title
by controlled diffraction or phased-array beam steering (controlled diffraction for optical switching G02F1/31) · CPC title
Switch and router aspects · CPC title
spatial light modulator · CPC title
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Frequently asked questions
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- What does patent US2016286288A1 cover?
- An optical switch with a flat transmission property is provided. The optical switch includes an input port, an output port, a diffractive grating configured to perform wavelength demultiplexing on an optical signal from the input port, and LCOS configured to deflect the wavelength-demultiplexed optical signal to the output port. The diffractive grating is pre-arranged such that a shape of the o…
- Who is the assignee on this patent?
- Nippon Telegraph & Telephone, Ntt Electronics Corp
- What technology area does this patent fall under?
- Primary CPC classification H04Q11/0003. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).