公开(公告)号：US3791715A

公开(公告)日：1974-02-12

申请号：US3791715D

申请日：1972-12-11

Applicant: IBM

Inventor： LEAN E ,  PENNINGTON K

IPC: G02B6/30 ,  G02F1/335 ,  G02B5/14

CPC classification number: G02B6/30 ,  G02F1/335

Abstract: A coupler for optical guided waves is described which is electronically switchable and wherein light traveling in a fiber optic waveguide can be coupled into a thin film waveguide. The coupler consists of a substrate which in one embodiment is triangular in shape, with a thin film waveguide and an acoustic transducer on one surface thereof. The transducer is designed to produce an acoustic wave across the surface of the substrate and beneath the thin film waveguide. The output light from the optical fiber is introduced via a lens into a Fabry-Perot cavity formed by placing two high reflectivity mirrors located on the other two sides of the substrate. The light from the optical fiber is reflected back and forth in the cavity by being reflected from the surface on which the thin film is located. When the acoustic transducer is operated at the proper frequency, the light in the cavity is coupled into the thin film waveguide. Another embodiment is also shown wherein the fiber optic is connected directly into the substrate which is not triangular in shape.

Abstract translation: 描述了用于光学导波的耦合器，其可电子切换，并且其中在光纤波导中传播的光可以耦合到薄膜波导中。 耦合器由在一个实施例中为三角形的衬底，其一个表面上具有薄膜波导和声换能器组成。 换能器被设计成在衬底表面和薄膜波导之下产生声波。 来自光纤的输出光通过透镜被引入通过放置位于衬底的另外两侧上的两个高反射率镜形成的法布里 - 珀罗腔。 来自光纤的光通过从薄膜所在的表面反射而在空腔中来回反射。 当声换能器以适当的频率操作时，空腔中的光耦合到薄膜波导中。 还示出了另一实施例，其中光纤直接连接到不是三角形形状的衬底中。