Base-order radial polarization laser multiplexing equipment for high-capacity space communication

A technology of space communication and multiplexing equipment, applied in the field of atmospheric laser communication, to achieve the effect of expanding channel capacity, improving channel capacity, and avoiding crosstalk

Active Publication Date: 2021-04-30
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional polarization multiplexing equipment, two lasers with orthogonal polarization directions are used for co-channel transmission to avoid polarization crosstalk. The channel capacity can only be expanded for a limited number of times, and only two channels of signals can be accommodated.

Method used

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  • Base-order radial polarization laser multiplexing equipment for high-capacity space communication
  • Base-order radial polarization laser multiplexing equipment for high-capacity space communication
  • Base-order radial polarization laser multiplexing equipment for high-capacity space communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 A basic-order radial polarization laser multiplexing device for large-capacity space communication is shown, including a signal encoder 1, a signal modulation module, a carrier signal transmitting module, a signal receiving module, a signal demodulation module and a signal decoding 9; the signal encoder 1 converts the information to be sent into a corresponding electrical signal, and sends it to the signal modulation module; the carrier signal transmitter module produces a radially polarized laser with a wavelength of 1970nm as the carrier signal; the signal modulation module sends the signal according to the signal encoder 1 The electrical signal generates the corresponding signal, the corresponding signal is selected through the polarization state of the polarizer, and the corresponding modulated laser is generated, and the modulated laser is coupled into the carrier signal. The signal receiving module receives the corresponding laser and sends it to t...

Embodiment 2

[0114] Such as Figure 4 A fundamental-order radially polarized laser generating device shown includes a 1700nm wavelength single-mode fiber laser 101 , a one-way lens 102 , a thulium-doped disordered gain medium 103 , a reflective W-shaped axicon 104 and an output coupling mirror 105 .

[0115] 1700nm wavelength single-mode fiber laser 101, wavelength 1700nm, single-mode fiber laser, power adjustable from 0 to 12W;

[0116] One-way lens 102, one side is coated with an anti-reflection coating, the effective wavelength is 1680 to 1720nm, one side is coated with a reflective coating, and the effective wavelength is in the 2μm band;

[0117] Thulium-doped disordered gain medium 103, Tm:CYA crystal, length, width and height are 6mm*3*mm*3mm;

[0118] Reflective W-shaped axicon 104, made of glass, processed by diamond turning technology, the processing accuracy is 0.5mm, and the internal test is gold-plated;

[0119] Output coupling mirror 105, output efficiency 5%;

[0120] The...

Embodiment 3

[0123] Based on the structure of Embodiment 1, the basic-order radially polarized laser multiplexing method for large-capacity space communication is as follows:

[0124] (1) The signal encoder 1 converts the information to be sent into a corresponding electrical signal and sends it to the signal modulation module;

[0125] (2) carrier signal transmitting module 2 produces radially polarized laser as carrier signal;

[0126] (3) According to the electrical signal generated by the signal encoder 1, the first adjustable laser 31, the second adjustable laser 32, the third adjustable laser 33, the fourth adjustable laser 34, the fifth adjustable laser 35, the sixth After receiving the corresponding control instruction, the modulatable laser 36 controls the output of the laser. When the modulatable laser is turned on, the output laser passes through the corresponding first polarizer 41, second polarizer 42, and third polarizer respectively. 43. The fourth polarizer 44, the fifth p...

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Abstract

The invention discloses base-order radial polarization laser multiplexing equipment for high-capacity space communication. The base-order radial polarization laser multiplexing equipment comprises a signal encoder, a signal modulation module, a carrier signal transmitting module, a signal receiving module, a signal demodulation module and a signal decoder. The signal encoder converts to-be-sent information into an electric signal and sends the electric signal to the signal modulation module, the carrier signal emission module emits radial polarization laser with an intermediate infrared wavelength as a carrier signal, and the signal modulation module sends linear polarization laser with different polarization angles according to a control signal and sends the linear polarization laser to the carrier signal; the signal receiving end receives the modulated carrier signal and sends the modulated carrier signal to the signal demodulator, and the signal demodulator demodulates the signal, converts the signal into an electric signal and sends the electric signal to the signal decoder to complete space communication. Radial polarization vector lasers are used as carriers for polarization multiplexing, crosstalk in polarization beam coupling and propagation based on scalar beam carriers is overcome, and meanwhile the channel capacity is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of atmospheric laser communication, in particular to a basic-order radial polarization laser multiplexing device for large-capacity space communication. Background technique [0002] Atmospheric laser communication refers to a communication method that uses laser to transmit information through the atmosphere. It includes two parts: sending and receiving. The basic principle is that the carrier optical signal passes through the atmosphere as a transmission channel to complete point-to-point or point-to-multipoint information transmission. With the development and improvement of technology, atmospheric laser communication technology has become a hot technology in today's information technology. [0003] The current society has entered the "information age". The development of high-tech marked by communication technology and computer technology has brought about rapid changes in people's lives. diversificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/532H04B10/54H04B10/11H04B10/118
CPCH04B10/503H04B10/532H04B10/54H04B10/11H04B10/118
Inventor 周伟鲜安华柳阳雨曹雪王敬如康健陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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