Patent ID: 6792211
Filing Date: 2004-09-14
Classification: G02B,H04J

Abstract:
A system for selectively adding and selectively dropping a wavelength from a sequence of wavelengths carried by an optical fiber structure, the system comprising:an optical fiber channel, having a first channel end and a second channel end and including an optical filter positioned between the first and second channel ends that transmits substantially all incident light having a wavelength &lgr; equal to one of a group of selected wavelengths, &lgr;k1 (1&lE;k1&lE;K1), and that reflects substantially all incident light having a wavelength in a selected sequence, &lgr;â€²k2 (1&lE;k2&lE;K2; K2&gE;2), that differs from each of the wavelengths &lgr;k1; a first dual fiber collimator, having first and second optical fibers connected to the first channel end, to deliver a light beam to the channel and to receive a light beam from the channel, respectively, having at least one of the wavelengths &lgr;â€²1, &lgr;â€²2, . . . , &lgr;â€²K2; and a second dual fiber collimator, having third and fourth optical fibers connected to the second channel end, to receive a light beam from the channel and to deliver a light beam to the channel, respectively, having at least one of the wavelengths &lgr;k1, whereby light having the wavelength &lgr;k1 can be dropped from a light beam having the wavelength &lgr;k1 and light having the wavelength &lgr;k1 can be added to a light beam that does not have the wavelength &lgr;k1.