Gc. Bhar et al., DISPERSION-MATCHED UP-CONVERSION OF INFRA RED RADIATION IN A BETA-BARIUM BORATE CRYSTAL, Kvantovaa elektronika, 24(1), 1997, pp. 47-51
A large phase-matched spectral bandwidth of 220 nm with simultaneous a
ngular acceptance reaching 83 mrad was achieved in detection of near-i
nfrared radiation by critically phase-matched up-conversion utilising
for the Dst time the technique of dispersion matching in a beta barium
berate crystal and the commonly available YAG:Nd laser radiation as t
he pump.