G - Physics – 02 – B
Patent
G - Physics
02
B
88/0.1, 88/97.2,
G02B 5/30 (2006.01) G01B 9/02 (2006.01) G02B 6/12 (2006.01) G02B 6/126 (2006.01) G02B 27/50 (2006.01) G02F 1/00 (2006.01) G02F 1/01 (2006.01) G02F 1/21 (2006.01) G02F 1/313 (2006.01)
Patent
CA 1294161
ABSTRACT OF THE DISCLOSURE In a single mode optical waveguide having a substrate, a cladding layer formed on the substrate, a core portion embedded in the cladding layer, and an elongated member for applying a stress to the core portion or a stress relief groove for relieving a stress from the core portion in the cladding layer along the core portion. A position, shape and material of the elongated member or the groove are determined in such a way that stress-induced birefringence produced in the core portion in accordance with a difference in thermal expansion coefficient between the substrate and the single mode optical waveguide is a desired value. - 1 -
537436
Jinguji Kaname
Kawachi Masao
Okamoto Katsunari
Takato Norio
Yasu Mitsuho
Blake Cassels & Graydon Llp
Nippon Telegraph & Telephone Corporation
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