Raman Frequency Shifting in a CH(4):H(2):Ar mixture pumped by the fourth harmonic of a Nd:YAG Laser.
Mixtures of methane, hydrogen, and argon (CH(4):H(2):Ar) were studied as UV Raman shifters for ozone differential absorption lidar application. They have higher photochemical stability than pure CH(4) and the capability to produce, with high enough efficiency, either first CH(4) Stokes or, simultaneously, CH(4) and H(2) first Stokes with equal energies. These mixtures can be used as an inexpensive replacement for D(2) or a more stable substitute for pure CH(4) in single-pass high-power Raman shifters.
Simeonov
V
V
Mitev
V
V
van den Bergh
H
H
Calpini
B
B