Slanted fbg for srs suppression
AssigneenLight Photonics Corporation
InventorsDahv A.V. Kliner, Timothy S. McComb
Life of this patent
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Abstract
An example apparatus includes an optical fiber including a core and cladding, the core being situated to propagate an optical beam along a propagation axis associated with the core, and at least one fiber Bragg grating (FBG) situated in the core of the optical fiber, the fiber Bragg grating including a plurality of periodically spaced grating portions situated with respect to the propagation axis so that light associated with Raman scattering is directed out of the core so as to reduce the generation of optical gain associated with stimulated Raman scattering (SRS).
Claims21
An apparatus, comprising:
- an optical fiber including a core and cladding, the core being situated to propagate an optical beam along a propagation axis associated with the core;
- and
- at least one fiber Bragg grating (FBG) situated in the core of the optical fiber, the fiber Bragg grating including a plurality of periodically spaced grating portions situated with respect to the propagation axis so that light associated with Raman scattering is directed out of the core so as to reduce the generation of optical gain associated with stimulated Raman scattering (SRS).
An apparatus, comprising:
- a gain fiber including an actively doped core defining a propagation axis and a pump cladding surrounding the actively doped core, the gain fiber being situated to generate a signal beam;
- one or more pump sources optically coupled to the gain fiber to provide pump light for generation of the signal beam;
- a high reflector fiber Bragg grating (FBG) optically coupled to an end of the gain fiber active core and situated to reflect the signal beam propagating in the active core of the gain fiber;
- a partial reflector FBG optically coupled to an opposite end of the gain fiber active core and situated to partially reflect the signal beam and to transmit an output beam;
- and
- at least one slanted stimulated Raman scattering (SRS) FBG situated in the gain fiber so as to direct light associated with Raman scattering out of the gain fiber so as to reduce the generation of optical gain associated with SRS in the gain fiber.
An apparatus, comprising:
- an optical fiber including a core and cladding, the core being situated to propagate an optical beam along a propagation axis associated with the core;
- and
- at least one spectrally selective component optically coupled to the core of the optical fiber, the spectrally selective component including at least one optical redirecting portion situated at a non-perpendicular angle with respect to the propagation axis so that light associated with Raman scattering is directed out of the core so as to reduce the generation of optical gain associated with stimulated Raman scattering (SRS).
Dependencies are inferred from the claim text.