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Phase error compensating apparatus

a phase error and compensating device technology, applied in the field of optical communication devices, can solve the problems of phase error of light signals passing through the awg, loss and crosstalk,

Inactive Publication Date: 2017-10-12
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a device that can fix a problem where signals are out of phase. This device can make sure that the signals are always in the correct place, even if the cause of the problem is not fixed.

Problems solved by technology

A loss and a crosstalk may occur due to a phase error while a plurality of light signals is passing through the waveguides.
The phase error of the light signals passing through the AWG may occur due to, for example, a distortion of a radiation pattern at an input port of the AWG, a distortion occurring in a boundary between the waveguide array and a free propagation region, and a distortion occurring due to an interference among the waveguides included in the waveguide array.

Method used

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Examples

Experimental program
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Embodiment Construction

[0021]Hereinafter, some example embodiments will be described in detail with reference to the accompanying drawings. Regarding the reference numerals assigned to the elements in the drawings, it should be noted that the same elements will be designated by the same reference numerals, wherever possible, even though they are shown in different drawings. Also, in the description of embodiments, detailed description of well-known related structures or functions will be omitted when it is deemed that such description will cause ambiguous interpretation of the present disclosure.

[0022]Various alterations and modifications may be made to the examples. Here, the examples are not construed as limited to the disclosure and should be understood to include all changes, equivalents, and replacements within the idea and the technical scope of the disclosure.

[0023]Terms such as first, second, A, B, (a), (b), and the like may be used herein to describe components. Each of these terminologies is not...

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PUM

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Abstract

Provided is a phase error compensating apparatus. The phase error compensating apparatus may include a waveguide array disposed between a first free propagation region and a second free propagation region and configured to allow a light signal passed through the first free propagation region to move toward the second free propagation region, in which a length of each of the waveguides included in the waveguide array may be adjusted to compensate for a phase error of light signals passed through the waveguides.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims the priority benefit of Korean Patent Application No. 10-2016-0043580 filed on Apr. 8, 2016, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference for all purposes.BACKGROUND1. Field[0002]One or more example embodiments relate to an optical communication device, and more particularly, to an arrayed waveguide grating (AWG).2. Description of Related Art[0003]In optical communications, wavelength-division multiplexing (WDM) is a transmission method that may allocate a plurality of signals to different wavelength bands, and simultaneously transmit the signals through a single optical fiber. An arrayed waveguide grating (AWG) may be necessary for the WDM, and include an arrayed waveguides (also referred to as a waveguide array herein) including a plurality of waveguides having different lengths each. The AWG may distribute a light signal to each of the waveguides based...

Claims

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Application Information

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IPC IPC(8): G02B6/12G02B27/00
CPCG02B6/12011H04J14/02G02B27/0012G02B6/12016G02B5/3083G02B6/12033G02B26/06
Inventor PARK, HEUKKANG, SAE KYOUNGCHUNG, HWAN SEOK
Owner ELECTRONICS & TELECOMM RES INST