This paper describes a solid state high speed fiber-optic switch based on dynamically alterable magnetic stripe domains that occur naturally in epitaxial films of rare-earth iron garnet. The array of stripe domains acts collectively as a Faraday effect phase diffraction grating that deflects visible and infrared radiation. Electrically derived magnetic fields in the plane of the film steer incident light from an input fiber to one of several output fibers. Reciprocity and wavelength sensitivity can be exploited for systems applications. Both theoretical and experimental results are presented.
A combination of laser welding and gradient index (GRIN) lenses has been used to package commercial lasers, ELEDs and detectors for wide temperature range military environments.Both pigtailed single mode fiber packages and SMA connectorized multimode fiber packages have been developed which have high and stable coupling efficiency from -55 to 125°C.For example, a typical single mode laser package has a coupling efficiency o 40% with a variation over this temperature range. A multimode laser package has a typical coupling efficiency of 70% into 1O0jm graded index fiber with a variation over temperature. Room temperature coupling efficiency into 50/nu graded index fiber averaged 48% with a standard deviation of 2.36% for 140 devices sampled. Packages have been built for both 9mm and 5.6mm diameter commercial devices in configurations suited to circuit card or bulkhead mounting.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.