Optical tap

Details Optical tap Optical tap

1994-04-05

1995-09-12

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

G02B 600, G02B 636

Patent

active

054505127

ABSTRACT:
An optical tap for selecting a signal of only a certain wavelength from transmitted signals which are wavelength division-multiplexed. The tap transmits signals of other wavelengths as they are. The tap has an input optical fiber for receiving the wavelength division-multiplexed signals, a first diffraction grating for dispersing the incident light through a different angle for each different wavelength, a reflecting mirror for reflecting the certain wavelength of the dispersed light signal to select this wavelength, a first output fiber for delivering only the selected light, a second diffraction grating which concentrates the unreflected light, and a second output fiber for delivering the unselected wavelengths.

REFERENCES:
patent: 3905676 (1975-09-01), Ulrich
patent: 3975081 (1976-08-01), Kato et al.
patent: 4125860 (1978-11-01), Ishii et al.
patent: 5040165 (1991-08-01), Toshiaki

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