Optical waveguides – With optical coupler – Particular coupling function
Patent
1991-12-20
1993-05-04
Gonzalez, Frank
Optical waveguides
With optical coupler
Particular coupling function
385 31, 385 33, G02B 626
Patent
active
052088812
ABSTRACT:
An optical beam is made closer to diffraction limited by coupling it into a multi-mode guide, such as an optical fiber, of sufficient length to generate a stimulated Brillouin scattering (SBS) return beam with improved divergence. For this purpose the term .DELTA.kL is made substantially greater than .pi., where .DELTA.k is the difference in propagation vectors between the input and SBS beams, and L is the mutual interaction length of the input and SBS beams within the fiber. Beam amplification can also be provided by coupling a plurality of low power input beams that have respective wavelengths within the fiber's SBS linewidth into the fiber so that each of the input beams transfers energy into the SBS beam, which emerges with a power greater than that of any of its inputs. The beam cleanup and amplification functions are capable of operating with continuous wave or pulsed inputs.
REFERENCES:
patent: 4778238 (1988-10-01), Hicks
patent: 4807953 (1989-02-01), Smith et al.
patent: 4922481 (1990-05-01), Hicks
E. B. Aleksandrov, et al. "Stimulated Raman and Brillouin Scattering in Selective Resonators", Soviet Physics JETP 22, 986-992 (1966).
Serebryakov and Cheertkov, "Wavefront Reversal of Microsecond Radiation in Fiber Waveguides", Soviet Journal of Quantum Electronics, vol. 17, 1987, pp. 493-495.
Ippen and Stolen, "Stimulated Brillouin Scattering in Optical Fibers", Applied Physics Letters, vol. 21, 1972, pp. 539-541.
Cotter, "Stimulated Brillouin Scattering in Monomode Optical Fiber", Journal of Optical Communications, vol. 4, 1983, pp. 10-19.
Tsubokawa and Sasaki, "Coherent FSK Transmission Experiment Using Brillouin Amplification in a Single-Mode Fiber", Journal of Optical Communications, vol. 10, 1989, pp. 42-47.
Denson-Low W. K.
Duraiswamy V. D.
Gonzalez Frank
Hughes Aircraft Company
LandOfFree
Method and apparatus for optical beam combination and cleanup us does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for optical beam combination and cleanup us, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optical beam combination and cleanup us will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1980688