Patent
1987-05-11
1989-05-23
Sikes, William L.
350 9629, G02B 626, G02B 602
Patent
active
048324370
ABSTRACT:
An optical fiber is subjected to a series of traveling flexural waves propagating along a length of the fiber. At least a portion of an optical signal propagating within the optical fiber in a first propagation mode is coupled to a second propagation mode. The optical signal in the second propagation mode has a frequency which is equal to either the sum of or the difference between the frequency of the optical signal in the first propagation mode and the frequency of the traveling flexural waves. The frequency of the optical signal in the second propagation mode is shifted upward or downward from the frequency of the optical signal in the first propagation mode as determined by the direction of propagation of the first optical signal with respect to the direction of propagation of the traveling flexural waves, and as also determined by whether the phase propagation velocity of the optical signal in the first propagation mode is greater than or less than the propagation velocity of the optical signal in the second propagation mode.
REFERENCES:
patent: 3406358 (1968-10-01), Seidel et al.
patent: 3625589 (1971-12-01), Snitzer
patent: 3645603 (1972-02-01), Smith
patent: 3931518 (1976-01-01), Miller
patent: 3936144 (1976-02-01), Caton
patent: 4067643 (1978-01-01), Sugimura et al.
patent: 4086484 (1978-04-01), Steensma
patent: 4236786 (1980-12-01), Keck
patent: 4312562 (1982-01-01), Segawa et al.
patent: 4319186 (1982-03-01), Kingsley
patent: 4684215 (1987-08-01), Shaw et al.
patent: 4729620 (1988-03-01), Pavlath
patent: 4735484 (1988-04-01), Fesler
patent: 4735485 (1988-04-01), Shaw et al.
Taylor et al., "Acousto-Optic Phase Modulator Single Mode Optical Fiber", Navy Technical Disclosure Bulletin, vol. 11, No. 2, Dec. 1985, pp. 65-70.
Kino et al., "Acoustic Modulators for Optical Fibres", Revue de Physique Appliquee, vol. 20., No. 6, Paris, France, Jun. 1985, pp. 333-340.
R. N. Thurston, "Elastic waves in rods and clad rods", J. Acous. Soc. America, 64(1), Jul. 1978, pp. 1-37.
Lardat et al., "Applications of Edge-Bonded Transducers to SAW Components", Proceedings of the IEEE, vol. 64, No. 5, May 1976, pp. 627-630.
D. Bancroft, "The Velocity of Longitudinal Waves in Cylindrical Bars", Physical Review, vol. 59, Apr. 1, 1941, pp. 588-593.
H. McSkimin, "Propagation of Longitudinal Waves and Shear Waves in Cylindrical Rods at High Frequencies", J. Acoustical Soc. of America, vol. 28, No. 3, May 1956, pp. 484-494.
L. Pochhammer, "Ueber die Fortpflanzungsgeschwindigkeiten Kleiner Schwingungen in Einem Unbegrenzten Isotropen Kreiscylinder", Journal Fur Reine Und Angewandte Mathematik, vol. 81 (1876), pp. 324-326.
Meeker et al., "Guided Wave Propagation in Elongated Cylinders and Plates", Physical Acoustics-Principles and Methods, vol. 1A, W. P. Mason, Editor, Academic Press, New York, 1964, pp. 111-167.
R. Davies, "A Critical Study of the Hopkinson Pressure Bar", Philosophical Transactions of the Royal Society of London, vol. 240, Jan. 8, 1948, pp. 375-457.
Martin Redwood, Mechanical Waveguides, Pergamon Press, 1960, pp. 135-173.
Cook et al., "Surface Waves at Ultrasonic Frequencies", ASTM Bulletin, May 1954, pp. 81-84.
Gfeller, "Electroacoustic Transducers for Optical Fiber Modulator and Tap", IBM Technical Disclosure Bulletin, vol. 21, No. 2, Jul. 1978, pp. 813-814.
Gfeller et al., "Modulator and Tap for Optical Fiber Systems", IBM Technical Disclosure Bulletin, vol. 21, No. 5, Oct. 1978, pp. 2014-2015.
Layton et al., "Optical Fiber Acoustic Sensor Utilizing Mode-Mode Interference", Applied Optics, vol. 18, No. 5, Mar. 1, 1979, pp. 666-670.
Ulrich et al., "Single-mode fiber-optical polarization rotator", Applied Optics, vol. 18, No. 11, Jun. 1, 1979, pp. 1857-1861.
Heismann et al., "Integrated-Optical Single-Sideband Modulator and Phase Shifter", IEEE J. of Quantum Electronics, vol. QE-18, No. 4, 4/82, pp. 767-771.
Kitayami et al., "Stress-induced frequency tuning for . . . single-mode fiber", Applied Physics Letters, vol. 41, No. 4, Aug. 1982, pp. 322-324.
Wong et al., "Electro-optic-waveguide frequency translator . . . exchange", Optics Letters, vol. 7, No. 11, Nov. 1982, pp. 546-548. (1982).
Onashi et al., "phase-matching light amplification by three-wave . . . stress", Applied Physics Letters, vol. 41, No. 12, Dec. 15, 1982, pp. 1111-1113.
Kingston et al., "Broadband guided-wave optical frequency translator . . . array", Applied Physics Letters, vol. 42, No. 9, May 1, 1983, pp. 759-761.
Nosu et al., "Acousto-optic Frequency Shifter for Single Mode Fibers", published at the 47th Int'l. Conf. on Integrated Optics . . . in Tokyo, Jun. 1983, Paper 29C5-3.
Nosu et al., "Acoustooptic Phase Modulator for Single Mode Fibers", published at the 47th Int'l. Conf. on Integrated Optics . . . in Tokyo, Jun. 1983, Paper 28C3-5.
Nosu et al., "Acousto-Optic Frequency Shifter for Single-Mode Fibers", Electronic Letters, vol. 19, No. 22, Sep. 29, 1985, pp. 816-818.
Youngquist et al., "Birefringent Fiber Polarization Coupler", Optics Letters, vol. 8, No. 12, Dec. 1983, pp. 656-658.
Risk et al., "Single-sideband frequency shifting in birefringent optical fiber", SPIE, Fiber Optic and Laser Sensors II, vol. 478, 1984, pp. 91-97.
Risk et al., "Acousto-Optic Birefringent Fiber Frequency Shifters", Integrated and Guided Wave Optics Conference, Kissimmee, Florida (4/84).
Youngquist et al., "Two-Mode Fiber Modal Coupler", Optics Letters, vol. 9, No. 6, Jun. 1984, pp. 249-251.
Brooks et al., "Active Polarization Coupler for Birefringent Fiber", Optics Letters, vol. 9, No. 6, Jun. 1984, pp. 249-251.
Youngquist, "Single Sideband Frequency Shifting", Ph.D. Thesis: Loss and Periodic . . . Couplers, Chapter 7, Stanford University, Jun. 1984, pp. 79-88.
Risk et al., "Acousto-optic frequency shifting in birefringent fiber", Optics Letters, vol. 9, No. 7, Jul. 1984, pp. 309-311.
Heismann et al., "Integrated-optical frequency translator with stripe waveguide", Applied Physics Letters, vol. 45, No. 5, Sep. 1, 1984, pp. 490-492.
Taylor, "Bending Effects in Optical Fibers", J. of Lightwave Technology, vol. LT-2, No. 5, Oct. 1984, pp. 617-628.
Risk et al., "Acoustic Fiber-Optic Modulators", Proceedings of the IEEE Ultrasonics Symposium, Nov. 14-16, 1984, pp. 318-327.
Johnson, L. M., "Integrated Optical Components for Fiber Gyroscopes", SPIE's 29th Annual Int'l. Tech. Symposium . . . San Diego, 1985, Paper 566-14.
Youngquist et al., "All-fibre components using periodic coupling", IEEE Proceedings, vol. 132, Pt. J. No. 5, Oct. 1985, pp. 277-286.
Kim et al., "All-fiber acousto-optic frequency shifter", Optics Letters, vol. 11, No. 6, Jun. 1986, pp. 389-391.
Sorin et al., "Highly selective evanescent modal filter for two-mode optical fibers", Optics Letters, vol. 11, No. 9, Sep. 1986, pp. 581-583.
Baer et al., "Conical transducer for generation of acoustic waves in fluids", Applied Physics Letters, vol. 42, No. 7, Apr. 1, 1983, pp. 573-574.
Blake James N.
Engan Helege E.
Kim Byoung Y.
Shaw Herbert J.
Sikes William L.
The Board of Trustees of the Leland Stanford Junior University
Ullah Akm E.
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