Back to results
US 6,636,675 B2Granted
Optical fiber with reduced cladding-mode loss
AssigneeVerrillon, Inc.
InventorAbdelouahed Soufiane
Life of this patent
Estimating the term…
Abstract
The invention is directed toward an optical fiber that reduces the cladding mode coupling loss (CMCL) therein. The fiber includes a core, a cladding concentrically surrounding the core, and at least one lossy region concentrically surrounding the core. The lossy region is disposed within the cladding and is slightly displaced radially from the core.
Claims22
A method of suppressing cladding-mode loss in an optical fiber in conjunction with a fiber Bragg grating, the method comprising the steps of:
- a. providing a fiber including (i) a core configured to transmit radiation to a fiber Bragg grating, (ii) a cladding surrounding the core, and (iii) within the cladding, at least one annular region of a lossy material concentric with the core;
- and
- b. propagating radiation through the core, the radiation producing a core mode propagating through the core and a cladding mode propagating through the cladding near the core, the lossy region attenuating the cladding mode without substantially affecting the core mode.
A fiber adapted to selectively affect at least one wavelength from a radiation signal propagating therethrough, the fiber comprising:
- a. a core including a fiber Bragg grating or means facilitating creation of a fiber Bragg grating, the grating selectively affecting the at least one wavelength;
- b. a cladding surrounding the core;
- and
- c. within the cladding, at least one annular region of a lossy material concentric with the core, wherein radiation propagating through the core has a core mode propagating through the core and a cladding mode propagating through the cladding near the core, the lossy region being configured to attenuate the cladding mode without substantially affecting the core mode.
1 more element
Dependencies are inferred from the claim text.