Patent ID: 6307677
Filing Date: 2001-10-23
Classification: G02B,H04J

Abstract:
A dense wavelength division multiplexer for separating an optical signal into optical channels, comprising:means for inputting an optical signal, the optical signal comprising a plurality of optical channels;birefringent plate optically coupled to the inputting means and an outputting means;a first and second half-wave plates, each partially optically coupled to the birefringent plate on a side opposite than the inputting and outputting means, such that the first and second half-wave plates each is capable of intercepting approximately one-half of a signal from the birefringent plate;a lens optically coupled to the birefringent plate and to the first and second half-wave plates on a side opposite to the birefringent plate;a birefringent wedge optically coupled to the lens on a side opposite to the first and second half-wave plates; anda non-linear interferometer optically coupled to the birefringent wedge on a side opposite to the lens; andmeans for outputting the separated plurality of optical channels along a plurality of optical paths.