In degenerate four-wave mixing, the interaction of three input beams with a nonlinear medium generates a fourth coherent signal beam. The coherent nature of the signal beam offers several advantages in minor species detection in hostile or luminous environments. Prior experiments using ultraviolet input beams to detect OH or NH radicals in flames1,2 and NO as a low pressure gas3 readily demonstrated good background discrimination and high signal collection efficiency.

© 1991 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription