Irreversible optical device utilizing optical frequency shift

Details Irreversible optical device utilizing optical frequency shift Irreversible optical device utilizing optical frequency shift

1997-09-25

2000-07-18

Lee, John D.

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 27, 356349, 359238, G02F 1225

Patent

active

060918659

ABSTRACT:
An irreversible optical device using an optical frequency shift. The invention provides an irreversible phase shifter including frequency shifters. An irreversible interferometer is also provided which includes the irreversible phase shifter. The invention also provides an irreversible interferometer using a twin-mode optical fiber. In addition to the twin-mode optical fiber, this irreversible interferometer includes mode/frequency shifters and LP11 mode strippers. The irreversible interferometer exhibits a light transmissivity varying in accordance with the advancing direction of light, so that it can have the same functions as conventional optical isolators or circulators. In accordance with the invention, it is possible to configure a comb filter by incorporating passive mode couplers to the irreversible interferometer. It is also possible to vary the transmissivity and transmitting direction of light or to shift the comb position of the comb filter from a wavelength range, using electrical signals. Since the irreversible optical device of the invention uses optical fibers, it exhibits a small insertion loss and has features capable of achieving a phase shift or transmissivity modulation of light and a variation in the transmissivity of light depending on the wavelength of the light.

REFERENCES:
patent: 4215936 (1980-08-01), Winocur
patent: 4615582 (1986-10-01), Lefevre et al.
patent: 4802149 (1989-01-01), Moore
patent: 5040863 (1991-08-01), Kawakami et al.
patent: 5182610 (1993-01-01), Shibata
patent: 5757489 (1998-05-01), Kawakami

Affiliated with

Also associated with

Rating

Irreversible optical device utilizing optical frequency shift does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Irreversible optical device utilizing optical frequency shift, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Irreversible optical device utilizing optical frequency shift will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2045837