Patent ID: 6608719
Filing Date: 2003-08-19
Classification: G02B,H04J

Abstract:
A comb wavelength division multiplexer having an input side including an input device, said multiplexer comprising:a first polarization splitter (2) optically coupled to the input device; a first &lgr;/2 phase delay means (4) optically coupled to said polarization splitter; a birefringent crystal filter (5) optically coupled to said &lgr;/2 phase delay means and said first polarization splitter; and a reflective polarization splitter device (6) including a second polarization splitter (6-1), said reflective polarization splitter device being optically coupled to said birefringent crystal filter for splitting an incident light beam from the birefringent crystal filter into respective polarized beams, and reflecting said respective polarized beams back through said birefringent crystal filter and said first polarization splitter to an output device on the input side, wherein a three-core collimator and trapezoid prism provides the input device and said output device.