Optical waveguides – With optical coupler – Particular coupling structure
Patent
1996-08-26
1998-09-08
Ngo, John
Optical waveguides
With optical coupler
Particular coupling structure
385 37, 385 46, 385 48, 385 96, G02B 626
Patent
active
058057510
ABSTRACT:
A wavelength selective optical fiber coupler having various applications in the field of optical communications is disclosed. The coupler is composed of dissimilar waveguides in close proximity. A light induced, permanent index of refraction grating is recorded in the coupler waist. The grating filters and transfers energy within a particular range of wavelengths from a first waveguide to a second waveguide. Transversely asymmetric gratings provide an efficient means of energy transfer. The coupler can be used to combine or multiplex a plurality of lasers operating at slightly different wavelengths into a single fiber. Other embodiments such as a dispersion compensator and gain flattening filter are disclosed.
REFERENCES:
patent: 4474427 (1984-10-01), Hill et al.
patent: 4725110 (1988-02-01), Glenn et al.
patent: 4737007 (1988-04-01), Alferness et al.
patent: 4737607 (1988-04-01), Bernard et al.
patent: 4807950 (1989-02-01), Glenn et al.
patent: 4900119 (1990-02-01), Hill et al.
patent: 5007705 (1991-04-01), Morey et al.
patent: 5016967 (1991-05-01), Meltz et al.
patent: 5104209 (1992-04-01), Hill et al.
patent: 5107360 (1992-04-01), Huber
patent: 5157747 (1992-10-01), Aktins et al.
patent: 5187760 (1993-02-01), Huber
patent: 5216739 (1993-06-01), Hill et al.
patent: 5218655 (1993-06-01), Mizrahi
patent: 5235659 (1993-08-01), Atkins et al.
patent: 5271024 (1993-12-01), Huber
patent: 5287427 (1994-02-01), Atkins et al.
patent: 5309260 (1994-05-01), Mizrahi et al.
patent: 5327515 (1994-07-01), Anderson et al.
patent: 5337382 (1994-08-01), Mizrahi
patent: 5351321 (1994-09-01), Snitzer et al.
patent: 5363239 (1994-11-01), Mizrahi et al.
patent: 5367588 (1994-11-01), Hill et al.
patent: 5377288 (1994-12-01), Kashyap et al.
patent: 5400166 (1995-03-01), Huber
patent: 5416866 (1995-05-01), Sehlen
patent: 5420948 (1995-05-01), Byron
patent: 5425116 (1995-06-01), Dragone et al.
patent: 5444803 (1995-08-01), Kim et al.
patent: 5450511 (1995-09-01), Dragone
patent: 5457758 (1995-10-01), Snitzer
patent: 5459801 (1995-10-01), Snitzer
patent: 5495548 (1996-02-01), Bilodeau et al.
patent: 5506925 (1996-04-01), Greene et al.
patent: 5517589 (1996-05-01), Takeuchi
patent: 5581642 (1996-12-01), Deacon et al.
patent: 5633965 (1997-05-01), Bricheno et al.
"Efficient Mode Conversion in Telecommunication Fibre Using Externally Written Gratings", Elect. Ltrs. vol. 26, No. 16, Aug. 1990, pp. 1270-1272.
O. Okamoto, et al., "16-Channel Optical Add/Drop Multiplexer Using Silica-Based Arrayed-Waveguide Gratings", IEE 1995, Mar. 1995.
Y. Tachikawa, et al., "32 Wavelength Tunable Arrayed-Waveguide Grating Laser Based on Special Input/Output Arrangement", Elect. Ltrs., vol. 31, No. 19, Sep. 1995, pp. 1665-1666.
L. Dong, et al., "Ultraviolet Absorption i Modified Chemical Vapor Deposition Preforms", J. Opt. Soc. Am. B/vol. 11, No. 10, Oct. 1994, pp. 2106-2111.
D.L. Williams, et al., "Accelerated Lifetime Tests on UV Written IntraCore Gratings in Boron Germania Codoped Silica Fibre", Elect. Ltrs., vol. 31, No. 24, Nov. 1995, pp. 2120-2121.
M.S. Yataki, et al., "All-Fibre Wavelength Filters Using Concatenated Fused-Taper Couplers", Elect. Ltrs., vol. 21, No. 6, Mar. 1985, pp. 248-249.
M.C. Farries, et al., "Very Broad Reflection Bandwidth (44 nm) Chirped Fibre Gratings and Narrow Bandpass Filters Produced by the Use of an Amplitude Mask", Elect. Ltrs., vol. 30, No. 11, May 1994.
Victor Mizrahi, et al., "Optical Properties of Photosensitive Fiber Phase Gratings", J. of Lightwave Tech., vol. 11, No. 11, Oct. 93, pp. 1513-1517.
Jocelyn Lauzon, et al., "Numerical Analysis of the Optimal Length and Profile of a Linearly Chirped Fiber Bragg Grating for Dispersion Compensation", Optical Ltrs., vol. 20, No. 6, Mar. 1995, pp. 647-649.
Francois Ouellette, "All-Fiber Filter for Efficient Dispersion Compensation", Optics Ltrs., vol. 16, No. 5, Mar. 1991, pp. 303-305.
R.M. Atkins, et al., "Mechanisms of Enhanced UV Photosensitivity Via Hydrogen Loading in Germanosilicate Glasses", IEE 1993, May 11, 1993.
B. Malo, et al., "Effective Index Drift From Molecular Hydrogen Diffusion in Hydrogen-Loaded Optical Fibres and Its Effect on Bragg Grating Fabrication", Elect. Ltrs., vol. 30, No. 5, Mar. 3, 1994, pp. 442-443.
B. Malo et al., "Point-by-Point Fabrication of Micro-Bragg Gratings in Photosensitive Fibre Using Single Excimer Pulse Refractive Index Modification Techniques", Elect. Ltrs., vol. 29, No. 18, Sep. 2, 1993, pp. 1668-1669.
Francois Ouellette, et al., "Enhancement of Second-Harmonic Generation in Optical Fibers by A Hydrogen and Heat Treatment", Appl. Phys. Lett. 54(12), Mar. 20, 1989, pp. 1086-1088.
P.J. Lemaire, et al., "High Pressure H.sub.2 Loading as A Technique for Achieving Ultrahigh UV Photosensitivity and Thermal Sensitivity in GeO.sub.2 Dodped Optical Fibers", IEE 1993, Apr. 23, 1993, pp. 1191-1193.
"All-Fibre Narrowband Reflection Gratings at 1500 nm", Elect. Letters, vol. 26, No. 11, May 24, 1990, pp. 730-732.
C.M. Ragdale, et al., "Integrated Three Channel Laser and Optical Multiplexer for Narrowband Wavelength Division Multiplexing", Elect. Ltrs., vol. 30, No. 11, May 26, 1994, pp. 897-898.
P.E. Dyer, et al., "High Reflectivity Fibre Gratings Produced by Incubated Damage Using a 193 nm ArF Laser", Elect. Ltrs., vo. 30, No. 11, May 26, 1994, pp. 860-862.
V. Mizrahi, et al., "Four Channel Fibre Grating Demultiplexer", Elect. Ltrs., vol. 30, No. 10, May 12, 1994, pp. 780-781.
L. Dong, et al., "Enhanced Photosensitivity in Tin-Codoped Germanosilicate Optical Fibers", IEEE Photo. Tech. Ltrs., vol. 7, No. 9. Sep. 1995, pp. 1048-1050.
K.O. Hill, et al., "Photosensitivity in Optical Fibers", Ann. Rev. Mater Sci. 1993, 125-157.
K.P. Jones, et al., "Optical Wavelength Add-Drop Multiplexer in Installed Submarine WDM Network", Elect. Ltrs., vol., 31, No. 24, Nov. 1995, pp. 2117-2118.
T.A. Birks, et al., "2.times.2 Single-Mode Fiber Routing Switch", Optics Ltrs., vol. 21, No. 10, May 1996, pp. 722-724.
T.A. Birks, et al., "Low Power Acousto-Optic Device Based on a Tapered Single-Mode Fiber", IEEE Poto. Tech. Ltrs., vol. 6, No. 6, Jun. 1994, pp. 725-727.
D.O. Culverhouse, et al., "Four Port Fused Taper Acousto-Optic Devices Using Standard Singlemode Telecommunications Fibre", Elect. Ltrs., vol. 31, No. 15, Jul. 1995, pp. 1279-1280.
T.A. Birks, et al., "Four-Port Fiber Frequency Shifter With a Null Taper Coupler", Optics Ltrs., vol. 19, No. 23, Dec. 1994, pp. 1964-1966.
T.A. Birks, et al., "All-Fiber Polarizer Based on a Null Taper Coupler", Optics Ltrs., vol. 20, No. 12, Jun. 1995, pp. 1371-1373.
H. Bissessur, et al., "16 Channel Phased Array Wavelength Demultiplexer on InP With Low Polarization Sensitivity", IEEE 1994, Dec. 1993.
M.S. Whalen, et al., "In-Line Optical-Fibre Filter For Wavelength Multiplexing", Elect. Ltrs., vol. 21, No. 17, Aug. 1985, pp. 724-725.
F. Ouellette, et al., "Broadband and WDM Dispersion Compensation Using Chirped Sampled Fibre Bragg Gratings", Elect. Ltrs., vol. 31, No. 11, May 1995, pp. 899-901.
Philip St. J. Russell, et al., "Fibre Gratings", Physics World, Oct. 1993.
D.L. Williams, et al., "Enhanced UV Photosensitivity in BoronCodoped Germanosilicate Fibres", Elect. Ltrs., Vol. 29, No. 1, Jan. 1993, pp. 45-47.
R. Kashyap, et al., "Measurement of Ultra-Steep Edge, High Rejection Fibre Bragg Grating Filters", Elect. Ltrs., Vol. 31, No. 15, pp. 1282-1283. Jul. 20, 1995.
Vikram Bhatia, "Optical Fiber Long-Period Grating Sensors", Optics Ltrs., vol. 21, No. 9, May 1996, pp. 692-694.
L. Dong, et al., "Single Pulse Bragg Gratings Written During Fibre Drawings", Elect. Ltrs., vol. 29, No. 17, Aug. 1993, pp. 1577-1578.
F. Bilodeau, et al., "An All-Fiber Dense-Wavelength-Division Multiplexer/Demultiplexer Using Photoimprinted Bragg Gratings", IEEE Photo. Tech. Ltrs., vol. 7, No. 4, Apr. 1995, pp. 388-390.
F. Bilodeau, et al., "Photosensitization of Optical Fiber and Silica-on-Silicon/Silica Waveguides", Optics Ltrs., vol. 18, No. 12, Jun. 1993, pp. 953-955.
paul J. Lamaire, "Reliability of Optical Fibers Exposed to Hydrogen: Prediction of Long-Term Loss Increases", Optic Eng., vol. 30, No. 6, Ju
Kewitsch Anthony S.
Rakuljic George A.
Yariv Amnon
Arroyo Optics Inc.
Ngo John
LandOfFree
Wavelength selective optical couplers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wavelength selective optical couplers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelength selective optical couplers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1291919