Method of implementing precoding based modulator for carrier suppression return-to-zero optical signals
A technology of carrier suppression and implementation method, which is applied in the direction of electromagnetic wave transmission system, electrical components, transmission system, etc., can solve the problems of high cost and complexity of implementation, and achieve the effects of easy integration, simple implementation, and reduced cost and complexity
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[0018] Such as figure 1 As shown, the components used in the embodiments of the present invention relate to precoders, lasers, Mach-Zehnder optical modulators and drivers. The precoder processes the input data and the half-rate clock to form a pulse-weighted three-level signal, which is sent to the driver for amplification, and then input to the radio frequency (RF) port of the Mach-Zehnder optical modulator to modulate the optical carrier to form a carrier-suppressed normalized signal. Zero (CSRZ) optical modulation signal. The specific implementation steps are as follows:
[0019] (1) if figure 2 As shown, the realization of the precoding process involves 3dB power divider, phase shifter, XOR gate, analog subtractor and low-pass filter. The input half-rate clock (such as image 3 As shown in a) First, it is divided into two channels with the same power through a 3dB power divider (which can be implemented directly on the PCB or adopts Picosecond’s Model5331), and one of...
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