Abstract
A high-speed broadband tunable microwave source utilizing the wavelength tunable characteristics of distributed Bragg reflector (DBR) laser is proposed and demonstrated. The wavelength tuning of the laser is achieved instantaneously by controlling the voltage of the phase section of the DBR laser. By means of optical delay self-heterodyne technology, the microwave signal with the property of frequency broadband tuning is generated. Sweep speeds of 5 and 40 μs of the sweep-frequency source prototype were achieved and the maximum tuning range was up to 38.45 GHz.
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