Waveguide bends and devices including waveguide bends

Details Waveguide bends and devices including waveguide bends Waveguide bends and devices including waveguide bends

2007-11-27

2007-11-27

Kianni, K. Cyrus (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling function

C385S032000, C385S050000

Reexamination Certificate

active

10479579

ABSTRACT:
Waveguide bends are specially designed according to a matching condition in order to suppress mode distortion and other undesirable effects. The bend is structured having regard to its length and curvature to ensure that at its end the first and second bend modes are substantially in phase with each other having completed approximately an integer number of beats. By being in phase at the end of the bend, the two modes are able to properly reconstruct the first mode of the straight waveguide and propagate on with a minimum of distortion, whether it be into a straight section, a further curved section of arbitrary curvature, into a free space propagation region and the like. This approach suppresses mode distortion, transition losses and other negative effects of waveguide bends. Device applications include couplers, Y-branches and Mach-Zehnder interferometers, all of which include waveguide bends.

REFERENCES:
patent: 4070094 (1978-01-01), Martin
patent: 4262992 (1981-04-01), Berthold, III
patent: 5243672 (1993-09-01), Dragone
patent: 6229943 (2001-05-01), Okayama
patent: 6442321 (2002-08-01), Berini
patent: 6465153 (2002-10-01), Kewitsch et al.
patent: 6580850 (2003-06-01), Kazarinov et al.
patent: 2003/0059147 (2003-03-01), Berini
patent: 2003/0118279 (2003-06-01), Izhaki et al.
patent: 2004/0008943 (2004-01-01), Berini
patent: 0 668 517 (1995-08-01), None
Tsutomu Kitoh, et al., “Bending-Loss Reduction in Silica-Based Waveguides by Using Lateral Offsets”., vol. 13, No. 4, pp. 555-562 (1995).
T. Hirono, et al., “Optimized Offset to Eliminate First-Order Mode Excitation at the Junction of Straight and Curved Multimode Waveguides”., IEEE Phototronics Technology Letters, vol. 10, No. 7, pp. 982-984 (1998).
Andrea Melloni, et al., “Determination of Bend Mode Characteristics in Dielectric Waveguides”., Journal of Lightwave Technology, vol. 19, No. 4, pp. 571-577 (2001).
Andrea Melloni, et al., “An Effective Method for the Analysis of Bent Dielectric Waveguides”. LEOS '99, pp. 641-642 (1999).
Lucas B. Soldano et al., “Optical Multi-Mode Interference Devices Based on Self-Imaging: Principles and Applications”., Journal of Lightwave Technology, vol. 13, No. 4, pp. 615-627 (1995).
S.J. Garth., “Modes on a Bent Optical Waveguide”., IEEE Proceedings, vol. 134, Pt J, No. 4, pp. 221-229, (1987).
C.L. Xu, et al., “Efficient and Accurate Vector Mode Calculations by Beam Propagation Method”, Journal of Lightwave Technology, vol. 11, No. 7., pp. 1209-1215, (1993).
Simon J. Hewlett et al., “Fourier Decomposition Method Applied to Mapped Infinite Domains: Scalar Analysis of Dielectric Waveguides Down to Modal Cutoff”., Journal of Lightwave Technology, vol. 13, No. 3, pp. 375-383, (1995).
R. Baets et al., “Loss Calculation and Design of Arbitrarily Curved Integrated-Optic Waveguides”., J. Opt. Soc. Am., vol. 73, No. 2, pp. 177-182, (1983).
E.C.M. Pennings et al., Low-Loss Bends in Planar Opitical Ridge Waveguides, Electronics Letters, vol. 24, No. 16, pp. 998-999, (1988).
Ernst-Georg Neumann et al. “Curved Dielectric Optical Waveguides with Reduced Transition Losses”, IEE Proc., vol. 129, Pt.H, No. 5, pp. 278-280, (1982).
Weyl-kuo Wang, “Phase Compensation of Bent Silica-Glass Optical Channel Waveguide Devices by V ector-Wave Mode-Matching Method”., Journal of Lightwave Technology, vol. 15, No. 3, pp. 538-545, (1997).
D. Rowland, “Nonperturbative Calculation of Bend Loss for a Pulse in a Bent Planar Waveguide”., IEE Proc-Optoelectronics, vol. 144, No. 2, pp. 91-96 (1997).
C.F. Janz et al. “Bent Waveguide Couplers for (De) Multiplexing of Arbitrary Broadly-Separated Wavelengths Using Two-Mode Interference”, IEEE Photonics Technology Letters, vol. 7, No. 9 Sep. 1995.

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