We will cover intensity modulation formats like Non-Return-to-Zero (NRZ) on-off keying and multi-level Pulse Amplitude Modulation (PAM4), phase-based modulation schemes such as Binary and Quadrature Phase-Shift Keying (BPSK, QPSK), and advanced combinations like Quadrature. We will cover intensity modulation formats like Non-Return-to-Zero (NRZ) on-off keying and multi-level Pulse Amplitude Modulation (PAM4), phase-based modulation schemes such as Binary and Quadrature Phase-Shift Keying (BPSK, QPSK), and advanced combinations like Quadrature. In optical fiber communication, optical fiber modulation is the process of “loading data into optical signals”. Light itself is a single waveform and cannot directly carry complex information. Therefore, certain characteristics of light (such as brightness and vibration state) need to be adjusted. Fiber optic modulators alter optical signals to carry information, converting electronic data into an optical format for transmission through fiber optic cables. This give-and-take. Optical modulators are devices that modify the properties of light, such as its amplitude, phase, frequency, or polarization, in response to an external signal.
