Optical waveguides – Integrated optical circuit
Patent
1997-07-08
1999-08-17
Lee, John D.
Optical waveguides
Integrated optical circuit
385 15, G02B 612
Patent
active
059405481
ABSTRACT:
A guided-wave circuit with a phase adjusting plate which adjusts optical path length errors, occurring during the manufacture of PLC, by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with an amplitude adjusting plate which adjusts the amplitude characteristics of light by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with a birefringence adjusting plate which adjusts the birefringence of light by an additional processing subsequent to the manufacture of the PLC; as well as a method for producing the guided-wave circuit. The guided-wave circuit includes a groove crossing a plurality of waveguides constituting the optical waveguides, a plate having optical characteristics spatially changed so as to adjust the optical characteristics at the intersections of the plate with the optical waveguides when the plate is inserted into the groove, and an adhesive for fixing the plate in the groove. The guided-wave circuit also includes both a phase adjusting plate and an amplitude adjusting plate to achieve further improvement in the optical characteristics. An apparatus for producing these optical characteristics adjusting plates is also included.
REFERENCES:
patent: 5546483 (1996-08-01), Inoue et al.
Masayuki Okuno et al., "Silica-based Thermo-optic Switches", Nov. 1994, pp. 1289-1298.
H. Takahashi et al., "Arrayed-Waveguide Grating for Wavelength Division Multi/Demultiplexer with Nanometre Resolution", Jan. 1990, pp. 87-88.
K. Takada et al., "Measurement of phase error distributions in silica-based arrayed-waveguide grating multiplexers by using Fourier transform spectroscopy", Sep. 1994, pp. 1671-1672.
H. Yamada et al., "Statically-phase-compensated 10GHz-spaced arrayed-waveguide grating", Aug. 1996, pp. 1580-1581.
H. Yamada et al., "10GHz-spaced arrayed-waveguide grating multiplexer with phase-error-compensating thin-film heaters", Mar. 1995, pp. 360-361.
Abe Makoto
Inoue Yasuyuki
Mitachi Seiko
Takada Kazumasa
Yamada Hiroaki
Frank Robert J.
Kang Juliana K.
Lee John D.
Nippon Telegraph and Telephone Corporation
Voorhees Catherine M.
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