Electro-optic modulator
US-9195112-B2 · Nov 24, 2015 · US
Polarization multiplexing optical receiving device and polarization multiplexing optical receiving method
US9020366B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9020366-B2 |
| Application number | US-201213977937-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 20, 2012 |
| Priority date | Jan 24, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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Provided are a polarization multiplexing optical receiving device and a polarization multiplexing optical receiving method with which a mismatch of optical intensity between polarized signals accumulated in an optical transmission path of an optical receiving system can be compensated with high precision, and a high-quality polarized optical signal can be received. A polarization multiplexing optical receiving device according to the present invention includes: a semiconductor optical element for adjusting the optical signal intensity of each of a TE mode and a TM mode of a polarization-multiplexed optical signal; a polarization beam splitter for spectrally separating the polarization-multiplexed optical signal into the TE mode optical signal and the TM mode optical signal; and a control circuit for calculating the optical intensity ratio between the TE mode optical signal and the TM mode optical signal, which have had the optical signal intensity thereof adjusted by the semiconductor optical element and which have been spectrally separated by the polarization beam splitter, and for performing feedback control of the semiconductor optical element so that the calculated optical intensity ratio reaches a desired value.
First claim
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The invention claimed is: 1. A polarization multiplexing optical receiving device comprising: a semiconductor optical element which adjusts optical signal intensity of each of a transverse electric(TE) mode and a transverse magnetic(TM) mode of a polarization-multiplexed optical signal; a polarization beam splitter which spectrally separates the polarization-multiplexed optical signal into the TE mode optical signal and the TM mode optical signal; and a control circuit which c…
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- What does patent US9020366B2 cover?
- Provided are a polarization multiplexing optical receiving device and a polarization multiplexing optical receiving method with which a mismatch of optical intensity between polarized signals accumulated in an optical transmission path of an optical receiving system can be compensated with high precision, and a high-quality polarized optical signal can be received. A polarization multiple…
- Who is the assignee on this patent?
- Okamoto Takeshi, Nec Corp
- What technology area does this patent fall under?
- Primary CPC classification G02F1/015. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 28 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).