Rapid-tuning device for CO2 heterodyne detection lidar

A device for rapid‐tuning cw, Q‐switched lasers for a CO2 heterodyne detection lidar is presented. It is shown that it is possible to utilize galvanometer‐driven mirrors to rapidly switch wavelengths over randomly selected lasing transitions in the 9–11 μm portion of the spectrum. Both a transmitter and a local oscillator are simultaneously switched between transitions while still achieving the frequency stability typically required for a coherent lidar system.

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