发明名称 |
HIGH-SPEED ELECTRO-OPTIC MODULATOR |
摘要 |
An optical modulator is provided to control the intensity of a transmitted o r reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with lo w polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotation. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high spee d modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.
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申请公布号 |
CA2328089(A1) |
申请公布日期 |
1999.12.29 |
申请号 |
CA19992328089 |
申请日期 |
1999.04.08 |
申请人 |
CORNING APPLIED TECHNOLOGIES |
发明人 |
MELMAN, PAUL;ZOU, KEVIN;TSANG, DEAN;JIANG, HUA;WANG, FEILING;WANG, GARY Y.;CHEN, QIUSHUI;ZHANG, RUN;ZHAO, JING |
分类号 |
G02F1/03;G02F1/055;(IPC1-7):G02F1/03 |
主分类号 |
G02F1/03 |
代理机构 |
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代理人 |
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主权项 |
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