title: Theory and optimization of hollow ducts.
abstract: Hollow ducts compressing and homogenizing the emission of laser diode arrays are cheap, low weight alternatives to lens ducts. An analytic model is presented describing hollow ducts including internal reflection losses, which is useful in optimizing these devices, especially in determining the optimum length for maximum transmission efficiency. As an example, a gold coated duct is presented showing high transmission efficiencies of >90% comparable to lens ducts.
authors.affiliation: French-German Research Institute of Saint-Louis ISL, 5, rue du Général Cassagnou, B.P. 70034, 68301 Saint-Louis Cedex, France. Marc.Eichhorn@isl.eu
authors.forename: Marc
authors.initials: M
authors.lastname: Eichhorn