Patent ID: 6301032
Filing Date: 2001-10-09
Classification: G02B,H04J

Abstract:
A light demultiplexing device that receives wavelength multiplexed light and demultiplexes light of a first wavelength and light of a second wavelength from the wavelength multiplexed light, comprising:an optical device, connected to first, second and third light transmission paths, introducing the wavelength multiplexed light from the first light transmission path to the second light transmission path;a first reflecting element, connected to the second light transmission path and a fourth light transmission path, receiving the wavelength multiplexed light via the second transmission path and reflecting light of the first wavelength to the optical device via the second transmission path; anda second reflecting element, connected to the fourth light transmission path, receiving the wavelength multiplexed light via the second and fourth transmission paths and reflecting light of the second wavelength to the optical device via the fourth and second transmission path; whereinthe optical device introduces the light of the first wavelength and the light of the second wavelength from the second transmission path to the third transmission path, and whereinthe length of the fourth light transmission path is determined based on a transmission rate or a signal frequency.