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Optical phased array and phase modulation method thereof

An optical phased array and phase modulation technology, applied in the optical field, can solve the problems of the design and processing difficulty of the beam splitter

Pending Publication Date: 2020-07-28
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this modulation method has a large number of antennas, the system has extremely high requirements on the splitting accuracy of the beam splitter, which brings great difficulties to the design and processing of the beam splitter.

Method used

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  • Optical phased array and phase modulation method thereof
  • Optical phased array and phase modulation method thereof
  • Optical phased array and phase modulation method thereof

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Embodiment Construction

[0019] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0020] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...

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Abstract

The invention discloses an optical phased array and a phase modulation method thereof. The optical phased array comprises L levels of optical splitters, L levels of phase controllers, and an antenna array; the numbers of waveguide groups from the first level to the Lth level are sequentially n1 to nL; and the number N of antenna in the antenna array is a product of n1 to nL; as for light beams ineach waveguide in the i-th level, ni-1-1 optical splitters and ni-1-1 phase controllers are needed in the (i-1)-th level to obtain ni-1 light beams through splitting; each split light beam enters onewaveguide; the light splitting precision of the optical splitter in the (i-1)-th level is 1 / ni-1, and i is a positive integer between 2 and (L-1). The optical splitters and the phase controllers are divided into different levels, so that the light splitting precision required by each optical splitter is reduced, thus, the requirements of a system on the optical splitters are lowered, and the expandability of the caliber of the system can be greatly improved.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an optical phased array and a phase modulation method thereof. Background technique [0002] Optical Phased Array (Optical Phased Array, OPA) controls the wavefront of the outgoing beam by changing the phase delay of the light in the array unit (that is, phase modulation), so as to achieve the purpose of deflecting the beam at any position. Its working principle is that the light emitted by the laser passes through the beam splitter to divide the light intensity equally, and the beam after each light intensity equalization is phase-modulated and input to the corresponding antenna in the antenna array through the corresponding waveguide, and finally achieves the purpose of beam deflection. [0003] At present, the commonly used phase modulation method is stacked, that is, the light in each waveguide is phase-modulated on the basis of the previous waveguide. However, when the num...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/29
CPCG02F1/292G02F1/2955
Inventor 赵复生王硕王斌王宇
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI