Speckle Noise Reduction of a Dual-Frequency Laser Doppler Velocimeter Based on an Optically Injected Semiconductor Laser


We develop and investigate a dual-frequency Laser Doppler Velocimeter (DF-LDV) based on an optically injected semiconductor laser. By operating the laser in a period-one oscillation (P1) state, the laser can emit light with two coherent frequency components separated by about 11.25 GHz. Through optical heterodyning, the velocity of the target can be… (More)

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