Patent
1982-01-08
1985-01-08
Sikes, William L.
350 9613, G02B 5172
Patent
active
044924259
ABSTRACT:
A device for deflecting light through 180.degree. characterized by a directional coupler comprising a pair of strip waveguides formed on a substrate with the end faces of the pair of strip waveguides being provided with a mirror. The directional coupler may be formed as a half of a coupler with the mirror effectively bisecting the length of the coupler, or it may be a .DELTA..beta. reversible directional coupler which is the whole length or as a half of a directional coupler. In addition, the directional coupler may be a controllable power dividing coupler and a phase shifter may be applied on one of the waveguides of the coupler. The device can also be utilized in a spectral comb filter.
REFERENCES:
patent: 4211467 (1980-07-01), Cross et al.
K. H. Tietgen, "Problems of Integrated Optics Topography", Digest of Workshop on Integrated Optics, Technische Univesitat Berlin, May 1980, pp. 114-120.
L. D. Hutcheson et al., "Losses in Diffused LiNbO.sub.3 Waveguides Caused by Directional Changes", Digest of Topical Meeting on Integrated and Guided Wave Optics, Incline Village, Jan. 28-30, 1980, Paper WB 2, pp. WB 2-1 to WB 2-4.
H. Kogelnik et al., "Switched Directional Couplers with Alternating .DELTA..beta.", IEEE Journal of Quantum Electronics, vol. QE-12, No. 7, Jul., 1976, pp. 396-401.
R. V. Schmidt et al., "Electro-optically Switched Coupler with Stepped .DELTA..beta. Reversal Using Ti-diffused LiNbO.sub.3 Waveguides", Applied Physics Letters, vol. 28, No. 9, May 1, 1976, pp. 503-506.
S. K. Sheem et al., "Wavelength Monitoring of Single-mode Diode Laser Using Guided-wave Interferometer", Optics Letters, vol. 5, No. 5, May 1980, pp. 179-181.
E. Hormann et al., "Titanium-Diffused LiNbO.sub.3 Waveguide Modulators and Switches Based on the Directional Coupler Principle", Siemens Forsch.-u Entwickl.-Ber., vol. 9, No. 3, 1980, pp. 163-167.
Kersten Ralf T.
Schlaak Helmut F.
Tietgen Karl H.
Siemens Aktiengesellschaft
Sikes William L.
Wise Robert E.
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