title: Efficient generation of tunable photon pairs at 0.8 and 1.6 microm.
abstract: We demonstrate efficient generation of collinearly propagating, highly nondegenerate photon pairs in a periodically poled lithium niobate cw parametric downconverter with an inferred pair generation rate of 1.4x10(7)/s/mW of pump power. Detection of an 800-nm signal photon triggers a thermoelectrically cooled 20%-efficient InGaAs avalanche photodiode for the detection of the 1600-nm conjugate idler photon. Using single-mode fibers as spatial mode filters, we obtain a signal-conditioned idler-detection probability of ~3.1%.
authors.forename: Elliott J
authors.initials: EJ
authors.lastname: Mason
authors.forename: Marius A
authors.initials: MA
authors.lastname: Albota
authors.forename: Friedrich
authors.initials: F
authors.lastname: König
authors.forename: Franco N C
authors.initials: FN
authors.lastname: Wong