Optical fiber having an elevated threshold for stimulated...

Details Optical fiber having an elevated threshold for stimulated... Optical fiber having an elevated threshold for stimulated...

2005-02-15

2005-02-15

Chowdhury, Tarifur R. (Department: 2871)

Optical waveguides

Optical fiber waveguide with cladding

C385S122000, C385S124000, C385S126000, C385S128000, C385S129000, C385S141000, C385S144000, C385S147000

Reexamination Certificate

active

06856740

ABSTRACT:
An optical fiber having an elevated threshold for stimulated Brillouin scattering is provided. The optical fiber includes a core and a cladding surrounding the core with both the core and the cladding designed to guide optical waves through the core while anti-guiding acoustic waves. Moreover, the optical fiber includes other features to alter the mode profile of the acoustic waves and/or to further promote their lateral radiation. For example, the optical fiber can include an irregular coating to alter the mode profile of the acoustic waves. In another example, the optical fiber can include a quarter wave layer surrounding the cladding to promote the lateral radiation of the acoustic waves. In order to further alter the mode profile of the acoustic waves, the cladding can also have a lateral thickness that varies irregularly in a lengthwise direction.

REFERENCES:
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patent: 5848215 (1998-12-01), Akasaka et al.
patent: 6687440 (2004-02-01), Balestra et al.

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