| abstract |
PCT No. PCT/GB91/00616 Sec. 371 Date Dec. 17, 1992 Sec. 102(e) Date Dec. 17, 1992 PCT Filed Apr. 19, 1991 PCT Pub. No. WO91/16657 PCT Pub. Date Oct. 31, 1991.A non-linear optical device comprises a crystalline, second harmonic generator material mounted in the optical path of a laser, in which the crystalline material consists of a slat of a chiral carboxylic acid and an organic nitrogenous base which has a noncentrosymmetric crystal structure. |