The design, manufacture, and test of a 1 × 4 micro-optical fiber switch for multimode fibers with 600-μm core diameters are described. Microlens array telescopes allow for variable and fast beam deflection when the positions of the cylindrical microlens arrays relative to each another are altered by specially designed piezomechanical actuators. Standard achromats are used for collimation of light emitted by the input multimode fiber and for focusing of the deflected light onto a linear array of output multimode fibers. Design and assembly of micro-optical as well as of optomechanical components are discussed. Insertion loss and cross talk are measured, and the results are compared with those of numerical optical simulations. Measurements of switching time and long-term stability, as well as of thermal behavior, are also presented.
© 2003 Optical Society of America
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(220.4880) Optical design and fabrication : Optomechanics
(230.6120) Optical devices : Spatial light modulators
(350.3950) Other areas of optics : Micro-optics
Jacques Duparré, Bernt Götz, and Rolf Göring, "Micro-Optical 1 × 4 Fiber Switch for Multimode Fibers with 600- μm Core Diameters," Appl. Opt. 42, 6889-6896 (2003)