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Low cost and compact optical phased array with electro-optic beam steering

An array and optical technology, applied in the field of optical phased array ToFLIDAR sensor, can solve the problem of overall power consumption

Inactive Publication Date: 2019-07-09
高能技系统股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, in automotive applications overall power dissipation can be difficult

Method used

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  • Low cost and compact optical phased array with electro-optic beam steering
  • Low cost and compact optical phased array with electro-optic beam steering
  • Low cost and compact optical phased array with electro-optic beam steering

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Experimental program
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Embodiment Construction

[0014] figure 1 The schematic diagram depicts the top view of the optical phased array. It is based on a substrate 10 with a waveguide input 11 into which light from an external source is coupled. Alternatively, an integrated light source can be used to generate light. The light is split by one or more splitters 12 to form split signals. An array of waveguides receives the split signals. The array of waveguides comprises a phase tuning region 13 comprising electrodes 14 and 15 . The electrodes 14 and 15 are subjected to the electro-optic effect based on the phase tuning control circuit 13'.

[0015] At the phase tuning region 13, the waveguide spacing is chosen such that device elements such as electrodes and trenches can be fabricated in this region. Also, a large waveguide spacing such as >10 μm is designed to minimize electrically related crosstalk in the array of waveguides. Therefore, the waveguide spacing in the phase-tuned region is an order of magnitude larger th...

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Abstract

An apparatus has a waveguide input to receive light. An optical splitter is connected to the waveguide input to form split signals. An array of waveguides receives the split signals. A phase tuning region includes electrodes within a cladding surrounding the array of waveguides. The phase tuning region produces an electro-optic effect under the control of a phase tuning control circuit applying anelectric field to the electrodes to render phase difference split signals within the array of waveguides. Output array waveguides emit the phase difference split signals as steered beams based on relative phase differences among the phase difference split signals.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application No. 15 / 342,958 filed November 3, 2016, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to the field of environment sensing using time-of-flight (ToF) LIDAR sensors. More specifically, the present invention is a low cost and compact optical phased array ToF LIDAR sensor with electro-optical beam steering. Background technique [0004] Optical phased arrays (OPAs) have been investigated for the manipulation of small beams (eg, laser beams). OPA represents an evolution of the well-developed Radio Frequency (RF) counterpart. Several groups have investigated optical phased arrays based on various technologies such as liquid crystals (LC), microelectromechanical systems (MEMS) and optical waveguide devices. [0005] One application of OPA is in light detection and ranging (LIDAR) sensors for automot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/88G01S17/89G01S7/481G01S17/93G01S17/10G02B6/12G02F1/137G02F1/29G01S7/4865
CPCG01S7/4814G01S7/4817G02F1/2955G01S7/4818G01S7/4865
Inventor J·福吉塔L·艾尔达达
Owner 高能技系统股份有限公司