The Advantages Of Coherent Light Modules
The coherent optical communication system modulates the signal to the optical carrier by modulating the amplitude, phase and frequency of the signal in the way of external light modulation (such as DP-QPSK) at the sending end. Compared with the traditional direct detection system, coherent detection can obtain more signal information through the beat frequency of signal light and local vibration. After the signal arrives at the receiving end, by means of high-speed digital signal processing (DSP) technology, through front-end processing such as equalization, it enters the optical mixer and the optical signal generated by the local oscillator for coherent mixing, so as to realize signal reconstruction and distortion compensation. Coherent optics is available for both 100G and 400G applications , primarily because it enables service providers to send more data over existing optical fibers, reducing the cost and complexity of network upgrades for bandwidth expansion. Main advantages...