Near- and middle-ultraviolet reconfigurable Raman source using a record-low UV/visible transmission loss inhibited-coupling hollow-core fiber

We report on two types of Raman laser sources emitting in the near and middle ultraviolet spectral ranges by use a solarization-resilient gas-filled inhibited-coupling (IC) hollow-core photonic-crystal fiber (HCPCF) with record low transmission loss (minimum 5 dB/km at 480 nm). The first source type emits comb generated hydrogen-filled HCPCF pumped 355 nm wavelength microchip nanosecond pulsed laser. lines span from 270 to near-infrared region no less than 20 270–400 range. second stands for dual-wavelength tuned ozone absorption band ultraviolet. Such either 266 289 nm, or 299 nm. relative power pair components is set optimize sensitivity detection differential lidar (DIAL). source’s physical package represents more 10-fold size-reduction current DIAL lasers, thus opening new opportunities on-field monitoring mapping. Both exhibit very small footprint are solarization-free.