Journal ArticleDOI
Fiber coupler for mode selection and high-efficiency pump coupling
TLDR
A pump/signal fiber coupler with functions of pump light coupling and high- order-mode suppression is reported, which can prevent mode distortion with fundamental mode launching, and improve the fiber laser beam quality with high-order-mode launching.Abstract:
A pump/signal fiber coupler with functions of pump light coupling and high-order-mode suppression is reported. This coupler is composed of pump fibers and a double-clad fiber (DCF) with high pump-coupling efficiency. The core of DCF is microdeformed in the coupling region, which serves mode selection. Theoretical analysis and experimental results verify these functions. In the experiment, the pump-coupling and signal-transmitting efficiency of the coupler were ∼98% and ∼96%, respectively. This coupler can prevent mode distortion with fundamental mode launching, and improve the fiber laser beam quality with high-order-mode launching.read more
Citations
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Patent
Scalable high power fiber laser
TL;DR: In this paper, a modular and scalable high-power fiber laser system is configurable to generate 1 kW or more of laser output, and includes one or more separable pump modules separately disposed from each other.
Patent
Fine-scale temporal control for laser material processing
Robert J. Martinsen,Qi Wang +1 more
TL;DR: In this article, the authors proposed a method to direct a laser beam to a target along a scan path at a variable scan velocity and adjust a digital modulation during movement of the laser beam along the scan path and in relation to the variable scan speed.
Patent
Adjustable beam characteristics
Dahv A. V. Kliner,Roger Farrow +1 more
TL;DR: In this article, the authors present methods, apparatus, and systems for perturbing an optical beam propagating within a first length of fiber to adjust one or more beam characteristics.
Patent
Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss
TL;DR: In this paper, an optical gain fiber has a core, a cladding surrounding the core, the core and cladding defining an optical gainsource numerical aperture, and a multimode fiber having a core with a larger radius than a radius of the optical gain core.
Patent
Beam parameter product (bpp) control by varying fiber-to-fiber angle
TL;DR: In this paper, the output end of the first fiber and the input end of a second fiber are spliced at a tilt angle so as to increase the first bpp to the second bpp.
References
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Journal ArticleDOI
Single-mode operation of a coiled multimode fiber amplifier
TL;DR: This technique will permit scaling of pulsed fiber lasers and amplifiers to significantly higher pulse energies and peak powers and cw fiber sources to higher average powers while maintaining excellent beam quality.
Journal ArticleDOI
High efficiency side-coupling of light into optical fibres using imbedded v-grooves
D.J. Ripin,Lew Goldberg +1 more
TL;DR: Transverse v-grooves, directly formed into the side of an optical fiber, totally reflect light incident on the fiber side-wall, directing it along the fibre axis.
Journal ArticleDOI
600 W power scalable single transverse mode tapered double-clad fiber laser.
TL;DR: It is shown that the influence of vignetting in a tapered fiber can be avoided, resulting in high overall efficiency, in good agreement with the presented model.
Journal ArticleDOI
Side-pump combiner for all-fiber monolithic fiber lasers and amplifiers
TL;DR: In this paper, a fiber side-pump combiner is presented, which does not interrupt the core of the active fiber, thus allowing for monolithic fiber lasers and amplifiers.
Journal ArticleDOI
Side-Coupling Scheme for a High-Power Laser Diode Array With Grating Couplers: Thermal and Geometrical Issues
TL;DR: In this article, two types of grating couplers were designed and fabricated: a gold-coated surface relief grating and gold-embedded silica grating coupling coupler.