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A photonic versatile waveform generator based on phase modulation in a Sagnac loop is proposed and experimentally verified. A continuous-wave light is modulated by a sinusoidal signal in a phase modulator to generate optical sidebands. Combined with a polariser, the Sagnac loop is used to manipulate the carrier of the modulated signal. Then, a fibre Bragg grating is applied to attenuate one of the...
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