title: Enhanced signal coupling into periodically poled lithium niobate with microlens arrays.
abstract: The return signal frequency of an eye-safe ladar system is upconverted from the infrared to the visible through sum-frequency generation by incorporation of periodically poled LiNbO3 into the receiver. A quantitative analysis of the angular acceptance and the quantum efficiency is then presented for a single macroscopic receiver optic and a multiaperture microlens array. Comparing both results, a 6x increase in the receiver field of regard and an 18% increase in beam coupling were realized for the microlens design over the macroscopic system.
authors.affiliation: christopher.brewer@wpafb.af.mil
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Brewer
authors.forename: Peter E
authors.initials: PE
authors.lastname: Powers
authors.forename: Sean M
authors.initials: SM
authors.lastname: Kirkpatrick
authors.forename: Edward A
authors.initials: EA
authors.lastname: Watson