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Optical Receiver Utilizing Wavelength Tunable Filters

A technology of optical receivers and filters, applied in electromagnetic receivers, instruments, optics, etc., can solve the problems of easy temperature stability of adhesives and the inability to use epoxy, etc., and achieve fast wavelength variable characteristics, easy Adjust wavelength, apply easy effects

Active Publication Date: 2022-04-19
光速株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this temperature is very high, and the temperature stability of polymer adhesives such as epoxy is likely to cause problems, which makes it impossible to use epoxy when assembling wavelength tunable filters.

Method used

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  • Optical Receiver Utilizing Wavelength Tunable Filters
  • Optical Receiver Utilizing Wavelength Tunable Filters
  • Optical Receiver Utilizing Wavelength Tunable Filters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0068] Hereinafter, non-limiting preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0069] figure 2 This is a conceptual diagram showing the process of selecting a desired optical channel in a conventional optical receiver using a wavelength tunable filter. figure 2 In order to facilitate the understanding of the present invention, an optical channel having four wavelengths is used, the frequency interval of each channel is exemplified as 200 GHz, and the four optical channels are respectively named a, b, c, and d for description.

[0070] figure 2 (a) It shows the state in which four optical channels a, b, c, and d are arranged at a frequency interval of 200 GHz. figure 2 (b) The transmission characteristic of the conventional wavelength tunable filter is illustrated. When the conventional wavelength tunable filter has the transmission characteristic of the frequency indicated by the solid line (left...

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Abstract

The present invention relates to an optical receiver capable of changing the selected wavelength by utilizing a wavelength tunable filter having a plurality of transmission wavelength characteristics, comprising: a tunable filter for transmitting laser light diverged from an optical fiber; a photodiode for receiving Laser light passing through a wavelength-tunable filter; the wavelength-tunable filter is a Fabry-Perot etalon filter with multiple transmission wavelengths. Moreover, in the optical receiver of the present invention, a thermoelectric element is arranged on the upper part of the base base, a photodiode chip for receiving light is arranged on the upper part of the thermoelectric element, and a transmitted wavelength is arranged on the upper part of the photodiode chip according to the temperature of the thermoelectric element. The wavelength variable filter that changes with temperature, so that the selected wavelength is changed according to the thermoelectric element, can obtain faster wavelength variable characteristics, and improve the quality of signal transmission.

Description

technical field [0001] The present invention relates to an optical receiver, and more particularly to an optical receiver using a wavelength tunable filter capable of changing a selected wavelength by using a wavelength tunable filter having a characteristic of a plurality of transmission wavelengths. Background technique [0002] Recently, communication services with a very large communication capacity have appeared, including video services such as smartphones. Therefore, it is necessary to greatly increase the conventional communication capacity, and one of the methods for increasing the communication capacity is the DWDM (Dense Wavelength Division Multiplexing) communication method using conventionally laid optical fibers. The DWDM utilizes the fact that lasers with different wavelengths do not interfere with each other. Even if optical signals of multiple wavelengths are transmitted through one optical fiber at the same time, there is no interference between the signals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/60G02F1/01G02F1/015
CPCH04B10/60G02F1/0147G02B26/001G02F1/015G02F1/0151G02F1/213H04B10/675G02F1/13629G02F1/1345G02F1/13458G02F1/136286G09G3/36G09G3/3648G09G2300/0408G09G2300/0426G09G2320/0209G09G2320/0223H01L27/1218H01L27/124H01L27/1244H01L27/1248
Inventor 金定洙
Owner 光速株式会社
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