Ostermayer F W, Benson W W
Appl Opt. 1974 Aug 1;13(8):1900-2. doi: 10.1364/AO.13.001900.
An integrating sphere for light scattered from fused silica optical fiber waveguides that is relatively simple to construct and easy to use is described. The novel feature is the use of a solid sphere of fused silica to facilitate coupling the scattered light out of the fiber cladding into the detector. The fiber is inserted into a slot in the sphere, and glycerine is used to index match between the fiber and sphere. The sphere is coated with high reflectivity barium sulfate, and a silicon photodiode detects the radiation in the sphere. The construction, operation, and performance tests on the sphere are described.
