Nlight, Incorporated

Nlight Photonics Corporation

C Geoffrey Fanning

Dahv A V Kliner

Tyson Lowder

Jay Small

Aaron Ludwig Hodges

Chris A Rivera

David R Balsley

Dahv Av Kliner

Timothy N Kutscha

Christopher Luetjen

Optical fiber devices, systems, and methods for separating Raman spectrum from signal spectrum. Once separated, the Raman spectrum may be suppressed (e.g., as a result of a reduction in gain from the signal spectrum, and/or through dissipation of the Raman spectrum energy), while the signal spectrum may be propagated in one or more guided modes of a fiber system. In some embodiments, a fiber system may include a chirped fiber Bragg grating (CFBG) or a long period fiber grating (LPFG), each configured to couple a core propagation mode into a cladding propagation mode with an efficiency that is higher for Raman spectrum than for signal spectrum. A fiber system further may include a cladding light stripper (CLS) configured to preferentially remove cladding modes containing the Raman component.

Optical fiber devices and methods for directing stimulated raman scattering (SRS) light out of a fiber core and into a cladding

Optical fiber devices, systems, and methods for coupling Raman spectrum out of an optical fiber selectively over a signal spectrum, which may be propagated in one or more guided modes of a fiber system. A fiber system may include a chirped fiber Bragg grating (CFBG) or a long period fiber grating (LPFG), each to unguide Raman light propagating in a core propagation mode of a fiber completely out of the fiber (through any surrounding cladding layer(s)) selectively over signal spectrum which is to remain in a guided mode of the fiber.

Optical fiber devices and methods for directing Stimulated Raman Scattering (SRS) light out of a fiber

Fiber laser devices, systems, and methods for reducing Raman spectrum in emissions from a resonant cavity. A fiber laser oscillator that is to generate an optical beam may include a Raman reflecting output coupler that strongly reflects a Raman component pumped within the resonant cavity, and partially reflects a signal component to sustain the oscillator and emit a signal that has a reduced Raman component. A Raman filtering output coupler may comprise a superstructure fiber grating, and such a grating may be chirped or otherwise designed to have a desired bandwidth.

Optical fiber devices and methods for reducing stimulated Raman scattering (SRS) light emissions from a resonant cavity

Apparatus include a first optical fiber including a core situated to propagate a signal beam at a signal wavelength and an unwanted stimulated Raman scattering (SRS) beam at an SRS wavelength associated with the signal wavelength, and a fiber Bragg grating (FBG) situated in a core of a second optical fiber optically coupled to the core of the first optical fiber, the FBG having a selected grating reflectivity associated with the SRS wavelength and being situated to reflect the SRS beam back along the core of the second optical fiber and to reduce a damage associated with propagation of the SRS beam to power sensitive laser system components optically coupled to the second optical fiber. Methods are also disclosed.

Methods for SRS protection of laser components and apparatus providing SRS protection

A fiber laser system comprises a main body, wherein the main body includes one or more fiber laser system components and a first wall hingedly attached to the main body along a first edge, the first wall having a first wall open position and a first wall closed position and a plurality of feed fiber management and splicing components mounted to the first wall. Additionally and/or alternatively, the laser system may comprise a cooling plate hingedly attached to the main body, the cooling plate has a cooling plate open position and a cooling plate closed position. Additionally and/or alternatively, the laser system may include a fiber management tray hingedly mounted to the cooling plate, the fiber management tray having a fiber management tray open position and a fiber management tray closed position.

Fiber laser fiber packaging and thermal management

Pulsed fiber lasers that amplify seed laser pulses include pump laser drivers that produce simmer currents during periods in which the seed pulse is suspended, and forward currents associated with steady state pulse amplification. By suitable selection of simmer currents, initiation of a series of seed pulses produces pulse-to-pulse output powers with suitable power variation.

Algorithms for rapid gating of seed suspendable pulsed fiber laser amplifiers

A laser system includes a laser resonator having a laser resonator volume and a gain block disposed therein, the gain block being configured to emit light at a predetermined laser wavelength, and an OPO unstable resonator having an OPO unstable resonator volume, the OPO unstable resonator optically coupled to the laser resonator and configured to receive light therefrom, wherein a portion of the OPO unstable resonator volume is situated with respect to the laser resonator volume so as to form an overlapping volume.

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Portland, OR, United States of America

C Geoffrey Fanning