Multi-carrier code division multiplexing light transmission system and method based on ultra dense wavelength division multiplexing
A technology of wavelength division multiplexing and transmission method, which is applied in the field of optical communication, and can solve problems such as limited radio frequency signals and short transmission distances
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Embodiment 1
[0054] Such as figure 1 As shown, this embodiment provides a multi-carrier code division multiplexing optical transmission system based on ultra-dense wavelength division multiplexing, including a multi-carrier light source generation part, a modulation part, a multiplexing part, and a demultiplexing part connected in sequence , a demodulation part and a signal processing part, the multi-carrier light source generating part utilizes a single-frequency light source to generate a multi-carrier light source for transmission; the modulation part is used to modulate each branch electrical signal to the multi-carrier light source generating part generated on the corresponding optical carrier; the multiplexing part is used to multiplex the optical carriers modulated by the modulation part into a fiber channel; the demultiplexing part is used to separate the optical carriers in the signal transmitted by the optical fiber, respectively Perform signal recovery; the demodulation part is ...
Embodiment 2
[0068] The structure of this embodiment is the same as that of Embodiment 1 except for the following features: this embodiment is based on ultra-dense wavelength division multiplexing. multi-carrier methods such as Figure 7 As shown, the multi-carrier light source generation part is composed of a coupler, an I / Q modulator, a first erbium-doped fiber amplifier, a filter, a second erbium-doped fiber amplifier and a phase controller closed loop, and the input terminals of the coupler are respectively connected to the phase The controller is connected to the laser, and the output end is respectively connected to the I / Q modulator and the signal output end, and the I / Q modulator is driven by two radio frequency signals with the same amplitude and 90-degree phase difference.
[0069] In the optical transmission method based on the above-mentioned multi-carrier code division multiplexing optical transmission system based on ultra-dense wavelength division multiplexing, the method ba...
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