Optical waveguides – With optical coupler – Particular coupling structure
Patent
1991-07-05
1992-09-08
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
385 24, 385122, 359337, G02B 626
Patent
active
051465175
ABSTRACT:
Transmission capabilities of optical fibers are enhanced with all-optical means for removing noise from signal pulses and for creating clean output pulses with specified characteristics. This is accomplished with a nonlinear interferometer that is designed to operate on an amplified optical signal in the manner of a threshold device. More specifically, the nonlinear interferometer is designed to have a relatively level region in its input/output transfer function in the neighborhood of the low input signal and in the neighborhood of the high input signal. Depending on the input signal characteristics, it is sometimes beneficial to design the interfereometer so that the nominal high level of the input signal falls approximately in the middle of its corresponding flat region. In another embodiment, a bandpass filter is included at the output of the interferometer to remove the excess bandwidth that is created by the preceding amplifiers and the interferometer itself. The filter also removes the out-of-band noise in the input signal.
REFERENCES:
patent: 5058986 (1991-10-01), Nayar et al.
"Pulse shaping, compression and pedestal suppression employing a nonlinear-optical loop mirror", Doran et al., Optics Letters, vol. 15, No. 22, Nov. 15, 1990, pp. 1294-1296.
Avramopoulos Hercules
Gabriel M. Christina
Whitaker, Jr. Norman A.
William French Paul M.
AT&T Bell Laboratories
Brendzel H. T.
Lee John D.
Ngo John
LandOfFree
Low distortion all-optical threshold device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low distortion all-optical threshold device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low distortion all-optical threshold device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-140284