公开(公告)号：US3822929A

公开(公告)日：1974-07-09

申请号：US14748671

申请日：1971-05-27

Applicant: IBM

Inventor： LEAN E ,  HEIDRICH P ,  KUHN L

IPC: G02F1/125 ,  G02F1/16

CPC classification number: G02F1/125

Abstract: A tunable optical filter suitable for use in integrated optical circuits including the combination of a substrate having an optical waveguide such as a thin film thereon. Means such as an optical fiber or grating is provided for introducing light waves in a first mode into the waveguide. An acoustic transducer driven by a tunable electronic signal source is used to propagate acoustic waves on the surface of the waveguide. The optical and acoustic waves interact to produce another optical wave having a mode different than the original optical wave when phase matching conditions are satisfied. A mode filter is located in the waveguide to block the original optical wave and pass the second optical wave.

Abstract translation: 一种适用于集成光电路的可调光滤波器，包括其上具有薄膜等光波导的基板的组合。 提供诸如光纤或光栅的装置用于将第一模式的光波引入到波导中。 由可调电子信号源驱动的声换能器用于在波导表面上传播声波。 当满足相位匹配条件时，光和声波相互作用以产生具有与原始光波不同的模式的另一光波。 模式滤波器位于波导中以阻挡原始光波并通过第二光波。

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。

公开(公告)号：CA930437A

公开(公告)日：1973-07-17

申请号：CA113590

申请日：1971-05-21

Applicant: IBM

Inventor： TSENG S ,  SADAGOPAN VARADACHARI ,  LEAN E

IPC: G11C21/02 ,  H03H9/42 ,  H03K5/15

Abstract: An integrated acoustic surface wave device is provided by this disclosure wherein a piezoelectric field associated with an acoustic surface wave causes a material adjacent to the surface to transform from one physical state to another physical state. The changes in state due to the presence of the piezoelectric wave are utilized to detect, amplify and store information. The presence of the piezoelectric wave controls external physical quantities, e.g., voltage and current, for information processing and storage. In particular, an amorphous semiconducting material is deposited on the surface of a piezoelectric surface wave acoustic delay line at a location where the presence of the traversing piezoelectric wave is to be detected. Contact electrodes are provided on the amorphous material and are connected to an external electrical circuit wherein there is a voltage source and a load means. The voltage source provides an electric field in the amorphous material of a value below that necessary to achieve the threshold value for switching the material from a high-voltage and low-current state to a high-current and low-voltage state. In this manner, the piezoelectric field of the acoustic surface wave which transiently appears at the amorphous material when added to the externally applied electric field causes it to switch states and thereby gives rise to a pulse indication in the external electrical circuit.

公开(公告)号：SE367525B

公开(公告)日：1974-05-27

申请号：SE845071

申请日：1971-06-30

Applicant: IBM

Inventor： LEAN E ,  SADAGOPAN V ,  TSENG S

IPC: G11C21/02 ,  H03H9/42 ,  H03K5/15 ,  H03H9/30

Abstract: An integrated acoustic surface wave device is provided by this disclosure wherein a piezoelectric field associated with an acoustic surface wave causes a material adjacent to the surface to transform from one physical state to another physical state. The changes in state due to the presence of the piezoelectric wave are utilized to detect, amplify and store information. The presence of the piezoelectric wave controls external physical quantities, e.g., voltage and current, for information processing and storage. In particular, an amorphous semiconducting material is deposited on the surface of a piezoelectric surface wave acoustic delay line at a location where the presence of the traversing piezoelectric wave is to be detected. Contact electrodes are provided on the amorphous material and are connected to an external electrical circuit wherein there is a voltage source and a load means. The voltage source provides an electric field in the amorphous material of a value below that necessary to achieve the threshold value for switching the material from a high-voltage and low-current state to a high-current and low-voltage state. In this manner, the piezoelectric field of the acoustic surface wave which transiently appears at the amorphous material when added to the externally applied electric field causes it to switch states and thereby gives rise to a pulse indication in the external electrical circuit.