Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Reexamination Certificate
2005-06-07
2005-06-07
Glick, Edward J. (Department: 2882)
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
C359S308000, C359S285000
Reexamination Certificate
active
06904188
ABSTRACT:
This invention relates to an acousto-optical tunable filter generally of the kind described in U.S. Pat. No. 6,266,462. More specifically, the invention relates to a filter and its construction, the filter including a support, first and second mounts at spaced locations on the support, an optical fiber having first and second mounted portions secured to the first and second mounts respectively and a filtering section between the first and second mounted portions, a signal generator operable to generate a periodic signal, and an electro-acoustic transducer having a terminal connected to the signal generator and an actuating portion, the electric signal causing vibration of the actuating portion, and the actuating portion being connected to the filtering section so that the vibration generates a transverse wave traveling along the filtering section. The filter has an improved damper to more effectively dampen waves traveling along the filtering section.
REFERENCES:
patent: 4068191 (1978-01-01), Zemon et al.
patent: 4781425 (1988-11-01), Risk et al.
patent: 4828350 (1989-05-01), Kim et al.
patent: 4832437 (1989-05-01), Kim et al.
patent: 4915468 (1990-04-01), Kim et al.
patent: 4971417 (1990-11-01), Krinsky et al.
patent: 5007705 (1991-04-01), Morey et al.
patent: 5022732 (1991-06-01), Engan et al.
patent: 5455877 (1995-10-01), Baran et al.
patent: 5708736 (1998-01-01), Steinblatt
patent: 6021237 (2000-02-01), Kim et al.
patent: 6151157 (2000-11-01), Ball et al.
patent: 6151427 (2000-11-01), Satorius
patent: 6233379 (2001-05-01), Kim et al.
patent: 6253002 (2001-06-01), Kim et al.
patent: 6266462 (2001-07-01), Kim et al.
patent: 6343165 (2002-01-01), Kim et al.
patent: 6510261 (2003-01-01), Sorin et al.
patent: 6539148 (2003-03-01), Kim et al.
patent: 6631224 (2003-10-01), Sorin et al.
patent: 6640027 (2003-10-01), Kim et al.
J.N. Blake, B.Y. Kim, H.E. Engan, and H.J. Shaw, “Analysis of intermodal coupling in a two-mode fiber with periodic microbends,” Optics Letters, vol. 12, No. 4, pp. 281-283 (Apr. 1987).
B.Y. Kim, J. N. Blake, H.E. Engan, and H.J. Shaw, “Acousto-optic frequency-shifting in two-mode optical fibers,” OFS '86, Tokyo, Japan (Oct. 8-10, 1986).
H.E. Engan, B.Y. Kim, J.N. Blake, and H.J. Shaw, “Propagation and optical interaction of guided acoustic waves in two-mode optical fibers,” Journal of Lightwave Technology, vol. 6, No. 3, pp. 428-436 (Mar. 1988).
J. O. Askautrud and H.E. Engan, “Fiber-optic frequency shifter with no mode change using cascaded acoustic-optic interaction regions,” Optics Letters, vol. 15, No. 11, pp. 649-651 (Jun. 1, 1990).
H.E. Engan, T. Myrtveit, and J.O. Askautrud, “All-fiber acousto-optic frequency shifter excited by focused surface acoustic waves,” Optics Letters, vol. 16, pp. 24-26 (Jan. 1, 1991).
H.E. Engan, D. Ostling, P.O. Kval, and J.O. Askautrud, “Wideband operation of horns for excitation of acoustic modes in optical fibers,” Proc. OFS (10), Glasgow, Oct. 11th -13th, 1994, pp. 568-571 (SPIE Proc. 2360).
D. Ostling and H.E. Engan, “Narrow-band acoustio-optic tunable filtering in a two-mode fiber,” Optics Letters, vol. 20, No. 11, pp. 1247-1249 (Jun. 1, 1995).
H.E.Engan, “Analysis of polarization mode coupling by acoustic torsional waves in optical fibers,” J. Opt. Soc. Am. A., vol. 13, No. 1, pp. 112-118 (Jan. 1996).
D Ostling and H.E. Engan, “Spectral flattening by an all-fiber acousto-optic tunable filter,” 1995 IEEE Ultrasonics Symposium, pp. 837-840.
D. Ostling and H.E. Engan, “Broadband spatial mode conversion by chirped fiber bending,” Optics Letters, vol. 21, No. 3, pp. 192-194 (Feb. 1, 1996).
D. Ostling and H.E. Engan, “Polarization-selective mode coupling in two-mode Hi-Bi fibers,” Journal of Lightwave Technology, vol. 15, No. 2, pp. 312-320 (Feb. 1997).
H.E. Engan, “Acoustic torsional waves used for coupling between optical polarization modes in optical fibers,” 1996 IEEE Ultrasonics Symposium, pp. 799-802.
D. Ostling and H.E. Engan, “Acousto-optic tunable filters in two-mode fibers,” Optical Fiber Technology, vol. 3, pp. 177-183 (1997).
B. Langli, P.G. Sinha, and K. Blotekjaer, “Acousto-Optic Mode Coupling of Partially Coherent Light in Two-Mode Fibers,” Optical Review, vol. 4, No. 1A, pp. 121-129, Jan./Feb. 1997.
T.A. Birks, P.S.J. Russell, and C.N. Pannell, “Low power acousto-optic device based on a tapered single-mode fiber,” IEEE Photonics Technology Lett., vol. 6, No. 6, pp. 725-727 (Jun. 1994).
M. Berwick and D.A. Jackson, “Coaxial optical-fiber frequency shifter,” Optics Letters, vol. 17, No. 4, pp. 270-272 (Feb. 15, 1992).
W.P. Risk and G.S. Kino, “Acousto-optic fiber-optical frequency shifter using periodic contact with a copropagating surface acoustic wave,” Optics Letters, vol. 11, No. 5, pp. 336-338 (May 1986).
W.P. Risk and G.S. Kino, “Acousto-optic polarization coupler and intensity modulator for berefringent fiber,” Optics Letters, vol. 11, No. 1, pp. 48-50 (Jan. 1986).
W.P. Risk, G.S. Kino, and B.T. Khuri-Yakub, “Tunable optical filter in fiber-optic form,” Optics Letters, vol. 11, No. 9, pp. 578-580 (Sep. 1986).
S.F. Su, R. Olshansky, D.A. Smith, and J.E. Baran, “Flattening of erbium-doped fibre amplifier gain spectrum using an acousto-optic tunable filter,” Electron Letters, vol. 29, No. 5, pp. 477-478 (Mar. 4, 1993).
Yijiang Chen, “Acousto-optic frequency shifter using coaxial fibers,” Optical and Quant. Electronics, vol. 21, pp. 491-498 (1989).
J. Ji, D. Uttam, and B. Culshaw, “Acousto-optic frequency shifting in ordinary single-mode fibre,” Electronics Letters, vol. 22, No. 21, pp. 1141-1142 (Oct. 9, 1986).
C.N. Pannell, R.P. Tatam, J.D.C. Jones, and D.A. Jackson, “Optical frequency shifter using linearly birefringent monomode fibre,” Electronics Letters, vol. 23, No. 16, pp. 847-848 (Jul. 30, 1987).
K. Nosu, H.F. Taylor, S.C. Rashleigh, and J.F. Weller, “Acousto-optic phase modulator and frequency shifter for single-mode fibers,” 1983 Ultrasonics Symposium, pp. 476-481 (1983).
B.Y. Kim, et al., “All-Fiber Acousto-Optic Frequency Shifter,” Optics Letters, vol. 11, No. 6, pp. 389-391 (Jun. 1986).
H.E. Engan, et al., “Propagation and Optical Interaction of Guided Acoustic Waves in Two-Mode Optical Fibre,” IEEE Journal of Lightwave Technology, vol. 6, No. 3, pp. 428-436 (Mar. 1988).
S.H. Yun, et al., “All-fiber Tunable Filter and Laser Based on Two-Mode Fiber,” Optics Letters, vol. 21, No. 1, pp. 27-29 (Jan. 1996).
M.Y. Jeon, et al., “An Electronically Wavelength-Tunable Mode-Locked Fiber Laser Using an All-Fiber Acoustooptic Tunable Filter,” IEEE Photonics Technology Letters, vol. 8, No. 12, pp. 1618-1620 (Dec. 1996).
H.S. Kim, et al., “All-fiber acousto-optic tunable notch filter with electronically controllable spectral profile,” Optics Letters, vol. 22, No. 19, pp. 1476-1478 (Oct. 1, 1997).
S.H. Yun, et al., “Wavelength-Swept Fiber Laser with Frequency Shifted Feedback and Reasonantly Swept Intra-Cavity Acoustooptic Tunable Filer,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 3, No. 4, pp. 1087-1096, Invited Paper (Aug. 1997).
H.S. Kim, et al., Actively gain-flattened Erbium-Doped Fiber Amplifier Over 35nm by Using All-Fiber Acoustooptic Tunable Filters, IEEE Photonics Technology Letters, vol. 10, No. 6, pp. 790-792 (Jun. 1998).
S.H. Yun, et al., “Dynamic Erbium-Doped Fiber Amplifier Based on Active Gain Flattening with Fiber Acoustooptic Tunable Filters,” IEEE Photonics Technology Letters, vol. 11, No. 10, pp. 1229-1231 (Oct. 1999).
H.E. Engan, et al., “Optical Frequency Shifting in Two-Mode Optical Fibers by Flexural Acoustic Waves,” IEEE 1986 Ultrasonics Symposium, pp. 435-438 (Nov. 17-19, 1986).
S.H. Yun, et al., “All-Fiber Acousto-O
Engan Helge E.
Hwang In-Kag
Kim Hyo-Sang
Lee Kwan Il
Polynkin Pavel G.
Blakely , Sokoloff, Taylor & Zafman LLP
Glick Edward J.
Novera Optics, Inc.
Suchecki Krystyna
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