Abstract

A dual-wavelength injection-seeded $Q$-switched Ho:YLF laser for ${{\rm CO}_2}$ differential absorption lidar pumped by the thulium-doped fiber laser was demonstrated. The single-frequency Ho:YLF seed laser was achieved by a pair of highly anti-misalignment corner cubes. The wavelength of an online seed laser was corrected to the P12 ${{\rm CO}_2}$ absorption line at 2064.414 nm by using a ${{\rm CO}_2}$ absorption cell. At the pulse repetition frequency of 100 Hz, the single-frequency pulsed energy was 16.1 mJ with the pulse width of 221.3 ns after a single-pass amplifier. The full width at half-maximum of a single-frequency pulsed spectrum was about 3.87 MHz, and the fluctuation of center frequency was 2.8 MHz in 30 min.

© 2019 Optical Society of America

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