G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/26 (2006.01) G02B 6/122 (2006.01) G02B 6/125 (2006.01) G02B 6/14 (2006.01) G02F 1/025 (2006.01) G02F 1/225 (2006.01) H04B 10/12 (2006.01)
Patent
CA 2209455
A Mach Zehnder (MZ) modulator with improved coupling of input and output fibers is provided. The MZ modulator combines the advantages of weakly guided input sections with strongly guided sections to optimize the coupling efficiency and selectivity of the device. Improved coupling between weakly and strongly guided sections of waveguide is provided by an intermediate tapered waveguide section which provides gradually changing mode confinement, which reduces the mode mismatch loss and therefore suppresses the relection at the junction between the weakly and strongly guided sections of the waveguide.
Rolland Claude
Yu Jun
Bookham Technology Plc
Mbm Intellectual Property Law Llp
Northern Telecom Limited
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