Patent ID: 8538210
Filing Date: 2013-09-17
Classification: G02B

Abstract:
1. An optical assembly comprising: at least a common collimator; a substrate; an array of channel collimators including an upper set of collimators and a lower set of collimators, wherein the upper set of collimators coupled to a first set of I/O fibers are mounted on a top of the substrate, and the lower set of collimators coupled to a second set of I/O fibers are mounted on a bottom of the substrate, wherein both of the first and second sets of I/O fibers are disposed on one side of the optical assembly; and a single beam folding component mounted near an end of the substrate, wherein the beam folding component turns a light beam traveling through a first one of the upper set of collimators via a first filter to a first one of the lower set of collimators via a second filter, wherein the first filter reflects a signal at a first wavelength and passes a first transmitted signal, and the second filter reflects a signal at a second wavelength from the first transmitted signal and passes a second transmitted signal; and the single beam folding component turning the second transmitted signal via a third filter to another one of the upper set of collimators, wherein the third filter reflects a signal at a third wavelength and passes a third transmitted signal that again is turned by the single beam folding component to another one of the lower set of collimators via a fourth filter that reflects a signal at a fourth wavelength from the third transmitted signal and passes a fourth transmitted signal, wherein all of the collimators and the common collimator are on one side of the beam folding components.