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公开(公告)号:EP1412809A2
公开(公告)日:2004-04-28
申请号:EP02749102.6
申请日:2002-07-31
申请人: Digilens, Inc.
IPC分类号: G02F1/035 , G02F1/1333
CPC分类号: G02F1/1326 , G02F1/0118 , G02F1/035 , G02F2203/06 , G02F2203/48
摘要: A layer (14) of optically active material overlaps the mode field of a single-mode optical waveguide (10) and has regions (16, 17) to which electric fields (E1, E2) can be applied by way of respective electrodes (18, 19) so as to vary the refractive index of the layer (14) in those regions. The regions (16, 17) are spaced apart longitudinally of the waveguide (10), and the fields (E1, E2) are so arranged that they extend at different angles to an interface (13) between the waveguide (10) and the layer (14) and act sequentially upon different polarisation components of radiation propagating along the waveguide (10). In one arrangement, the fields (E1, E2) are orthogonal to one another. In an alternative arrangement, a third field (E3) can be applied to a further longitudinally-spaced region of the layer (14) and the three fields (E1, E2 and E3) are arranged at (120°) to one another.
摘要翻译: 光学活性材料层(14)与单模光波导(10)的模场重叠并且具有区域(16,17),电场(E1,E2)可以通过各自的电极 ,19),以改变这些区域中层(14)的折射率。 区域(16,17)在波导(10)的纵向间隔开,并且场(E1,E2)被布置成使得它们以不同的角度延伸到波导(10)与层之间的界面(13) (14)并且依次作用于沿着波导(10)传播的辐射的不同偏振分量。 在一种配置中,场(E1,E2)彼此正交。 在一种替代的布置中,第三场(E3)可以被施加到层(14)的另一个纵向间隔的区域并且三个场(E1,E2和E3)彼此以(120°)被布置。