Generator for wholly optical tunable broadband linearly chirped signal

A generator for a wholly optical tunable broadband linearly chirped signal, comprising

• a mode-locked laser,
• a first optical coupler,
• a first optical filter,
• a first dispersion module,
• a second optical filter,
• a second dispersion module,
• a tunable time delay module,
• a second optical coupler,
• an optical amplifier, and
• a photodetector,
• wherein the first optical coupler is situated along a direction of an output light beam of the mode-locked laser;
• the first optical coupler splits an input light beam into a first light beam and a second light beam;
• the first optical filter, the first dispersion module, and the second optical coupler are successively situated along the first light beam;
• the second optical filter, the second dispersion module, the tunable time delay module, and the second optical coupler are successively situated along the second light beam;
• the second optical coupler combines the first light beam and the second light beam;
• and
• the optical amplifier and the photodetector are successively situated along an output direction of the second optical coupler.