Broadband light is fed into the input optical fiber and the fiber is placed adjacent an input port of a waveguide device. An aperture plate with a suitably sized aperture is placed between the relevant output ports of the waveguide device and a light intensity detector. The light intensity detector is...http://www.google.de/patents/US20030174329?utm_source=gb-gplus-sharePatent US20030174329 - System and method for aligning a first optical device with an input port of a second optical device
