Generation of bright and dark pulses with doubled repetition rate using direct external nonlinear modulation

A simple technique for the generation of bright and dark pulses train from continuous-wave (cw) light is presented. The principle is based on direct external nonlinear modulation and a simple theoretical explanation was given. Conversion between bright and dark pulses can be obtained by simple adjustment of the bias level and modulation depth of the modulator. The repetition rate of the pulses is twice the driven signal frequency.

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