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Multichannel spectral signal channel selection and reception system used for wireless optical communication

A wireless optical communication and signal channel technology, which is applied in the field of wireless optical communication, can solve the problems of inability to select multi-spectral signals, and achieve the effect of ensuring signal validity and reducing crosstalk

Inactive Publication Date: 2015-03-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the traditional optical wavelength division multiplexing receiver is separated by the wave splitter, it is directly detected by the multi-channel detection unit, and it is impossible to select the multi-spectral signal

Method used

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  • Multichannel spectral signal channel selection and reception system used for wireless optical communication
  • Multichannel spectral signal channel selection and reception system used for wireless optical communication
  • Multichannel spectral signal channel selection and reception system used for wireless optical communication

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Experimental program
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Effect test

Embodiment approach 1

[0035] see figure 2 , in this example, the incident spectrum signal 7 selects 5 lights with different wavelengths, which are red (such as the peak wavelength is 638.5nm ~ 639nm), yellow (such as the peak wavelength is 595nm ~ 597nm), green (such as the peak wavelength is 517.5nm nm~518.5nm), blue (such as the peak wavelength is 463nm~464nm), purple (such as the peak wavelength is 415nm~417nm), the receiving detector array selects APD or PIN array 6 to receive each spectral signal, and the detector array contains 5 Unit detectors, in which 3 visible light detectors are used to receive red, yellow and green spectral signals, and 2 blue light enhanced detectors are used to receive blue and violet light signals.

[0036] Five kinds of incident spectral signals are incident on the liquid crystal module 1 at a certain angle and separated in space, forming five spatially separated irradiation spots on the liquid crystal module, namely: incident spectral signal spot 8, wherein the in...

Embodiment approach 2

[0039] The second embodiment is a multi-channel single-spectrum selective receiving embodiment of space division multiplexing, and the placement positions of the main components are the same as those described in the first embodiment. The incident spectral signal is a single spectral signal of 5-way space division multiplexing. In this embodiment, 5 channels of red (eg, peak wavelength 638.5nm-639nm) optical signals are selected, and 5 visible light unit detectors are selected for the array.

[0040] see Figure 4 According to the 5 incident spectral signal spots 10 formed by the 5 red spectral signals on the liquid crystal module 1, the liquid crystal can be divided into 5 spectral signal selection areas 11, each spectral selection area is a rectangular area, and the divided rectangular area Contains the light spots formed by various red light signals on the liquid crystal module. Input the display command in the remote control visual interface on the industrial computer to...

Embodiment approach 3

[0042]Embodiment 3 is a multi-channel single-spectrum selective receiving embodiment of space-division multiplexing, wherein the incident spectral signal is 8-channel space-division multiplexed single-spectrum signal. In this embodiment, 8 channels of red (for example, peak wavelength 638.5 nm to 639 nm) optical signals are selected. see Figure 5 According to the 8 incident spectral signal spots 12 formed by the 8-way red spectral signal on the liquid crystal module 1, the liquid crystal can be divided into 8 spectral signal selection areas 13, each spectral selection area is a rectangular area, and the divided rectangular area Contains the light spots formed by various red light signals on the liquid crystal module. Through the remote control system, the 8 rectangular areas of the liquid crystal can be controlled to display, so as to gate each red light signal.

[0043] In the above three implementation modes, 5 or 8 channels of incident spectral signals are selected. In a...

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Abstract

The invention discloses a multichannel spectral signal channel selection and reception system used for wireless optical communication. The multichannel spectral signal channel selection and reception system comprises a spectral signal channel selection system and a reception system, wherein the spectral signal channel selection system comprises a liquid crystal module, a liquid crystal drive circuit and a remote control system; and the reception system comprises a detector array, a detector drive and a signal processing circuit. The multichannel spectral signal channel selection and reception system used for wireless optical communication is mainly used for the wireless optical communication, and is capable of implementing selection and reception of optical communication signals at a plurality of spectrum sections by adopting liquid crystal devices and carrying out selection and reception on multichannel single spectral signals for space division multiplexing.

Description

Technical field: [0001] The invention belongs to the field of wireless optical communication, in particular to a multi-spectral wavelength division multiplexing signal selective receiving system used in the field of wireless optical communication. Background technique: [0002] Wireless optical communication is a way of using light waves as carriers to communicate directly in free space. The traditional optical wavelength division multiplexing technology divides the wavelength of optical communication into several bands, and each band is used as an independent channel to transmit an optical signal of a predetermined wavelength. At the sending end of the wavelength division multiplexing transmission system, multiple signals are multiplexed by using a multiplexer to multiplex multiple optical carrier signals, and at the receiving end the optical signals of different wavelengths are separated by a splitter, and then passed through the multi-channel detection unit The restored ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11
Inventor 唐义崔璐黄河清朱庆炜张学斌
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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