Nonlinear optical switch

Details Nonlinear optical switch Nonlinear optical switch

1997-10-09

2000-04-11

Lee, John D.

Optical waveguides

With optical coupler

Switch

385 24, 385122, 359332, G02B 635

Patent

active

060496428

ABSTRACT:
An optically controlled optical switch operating at a high speed and at a high efficiency can be realized with a simple construction. An optical signal exiting from a nonlinear optical waveguide is passed through an optical frequency filter and then guided into an optical output signal port. The optical frequency filter is a band-pass filter for passing only optical signal pulses having a center frequency of .omega.1. Where the center frequency .omega.0 of controlling light is set within the absorption region of the nonlinear optical waveguide, optical controlling pulses are absorbed, and carriers are excited. This results in a change in the refractive index. Consequently, the center frequency .omega.1 of only the optical signal pulses entered simultaneously with the optical controlling pulses is shifted to .omega.2. The optical frequency filter blocks optical signal pulses whose center frequency has been shifted to .omega.2. Thus, a gate-type optical switching action is accomplished.

REFERENCES:
patent: 5369519 (1994-11-01), Islam
patent: 5596667 (1997-01-01), Watanabe
patent: 5742415 (1998-04-01), Manning et al.
Applied Physics Letters, vol. 70, No. 26 pp. 3498-3500 (Published Jun. 30, 1997) S. Nakamura and K. Tajima.
T. Morioka et al., "All-Optical Kerr Switching Techniques and Applications", Institute of Electrical and Electronics Engineers, vol. 2, No. 2, Dec. 1990, pp. 1311-1317.
D.M. Patrick et al., "Demultiplexing Using Crossphase Modulation-Induced Spectral Shifts and Kerr Polarisation Rotation in Optical Fibre", Electronics Letters, vol. 29, No. 2, Jan. 21, 1993, pp. 227-229.
S. Nakamura et al., "Ultrafast all-optical gate switch based on frequency shift accompanied by semiconductor band-filling effect", Appl. Phys. Lett., vol. 70, No. 26, Jun. 30, 1997, pp. 3498-3500.
"Ultafast Optical Techniques", edited by Tatsuo Yajima, Chapter 5, p. 121, 1990.
"A.M. Weiner et al., High-resolution femtosecond pulse shaping", Journal of Optical Society of America, B, vol. 5, No. 8, Aug. 1998, pp. 1563-1572.

Affiliated with

Also associated with

Rating

Nonlinear optical switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1182804