A Fundamental-Order Radial Polarization Laser Multiplexing Device for Large-Capacity Space Communications
A space communication, high-capacity technology, applied in free space transmission, satellite communication transmission, electrical components, etc., to avoid crosstalk, improve channel capacity, and expand channel capacity.
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Embodiment 1
[0054] like figure 1 A fundamental-order radially polarized laser multiplexing device for large-capacity space communication is shown, including a signal encoder 1, a signal modulation module, a carrier signal transmission module, a signal reception module, a signal demodulation module and a signal decoder 9 ; The signal encoder 1 converts the information to be sent into the corresponding electrical signal and sends it to the signal modulation module; the carrier signal emission module generates a radially polarized laser with a wavelength of 1970 nm as the carrier signal; the signal modulation module is based on the electrical signal sent by the signal encoder 1. , generate the corresponding signal, the corresponding signal is polarized through 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 the corresponding signal demodul...
Embodiment 2
[0114] like Figure 4 A fundamental-order radially polarized laser generating device shown includes a 1700 nm 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, 1700nm wavelength, single-mode fiber laser, adjustable power from 0 to 12W;
[0116] One-way lens 102, one side is coated with anti-reflection coating, effective wavelength is 1680 to 1720nm, one side is coated with reflective coating, effective wavelength is 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 process, processing accuracy of 0.5mm, gold-plated for internal measurement;
[0119] Output coupling mirror 105, output efficiency 5%;
[0120] The 1700nm wavelength single-mode fi...
Embodiment 3
[0123] Based on the structure of Embodiment 1, the fundamental-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) The carrier signal transmitting module 2 generates radially polarized laser light as a carrier signal;
[0126] (3) According to the electrical signal generated by the signal encoder 1, the first modulated laser 31, the second modulated laser 32, the third modulated laser 33, the fourth modulated laser 34, the fifth modulated laser 35, the sixth The modulated laser 36 controls the output of the laser after receiving the corresponding control command. When the modulated laser is in the on state, the output laser passes through the corresponding first polarizer 41, second polarizer 42, and third polarizer respectively. 43. The fourth polarizer 44, ...
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