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8184362 |
Phase control and locking method for coherently combining high-gain multi-stage fiber amplifiers
Presented is a method and system for phase locking a multi-stage parallel fiber amplifier. The method comprises receiving a signal beam from a first stage, in one path of the multi-stage fiber...
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8179934 |
Frequency conversion laser head
A laser assembly is configured with a frequency conversion laser head operative to shift a fundamental frequency of input light to the desired frequency of an output light. The frequency conversion...
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8179932 |
Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus
A pulse laser apparatus includes a laser configured to generate a pulse of a laser beam, a fiber amplifier, and a pulse compressor. The fiber amplifier includes a rare-earth doped fiber that...
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8179928 |
Passive coherent array using distributed fiber lasers
In some embodiments, an apparatus includes a first laser cavity including a set of high-reflector gratings coupled in series and a second laser cavity including a set of high-reflector gratings...
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8170071 |
Laser apparatus
Provided is a laser apparatus including: a DFB fiber laser 40 including, as an amplitude medium, a rare earth doped silica optical fiber codoped with a high concentration of aluminum; an optical...
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8165178 |
Method and apparatus for pumping and operating optical parametric oscillators using DFB fiber lasers
An optical parametric oscillator (OPO) is described that efficiently converts a near-infrared laser beam to tunable mid-infrared wavelength output. In some embodiments, the OPO includes an optical...
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8149885 |
Fiber laser processing apparatus
A fiber laser processing apparatus controls a LD drive current ILD in a power feedback control mode (FIG. 3E) such that output of a fiber laser beam FB rises substantially from zero or a value...
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8144737 |
Adjustable pulsewidth picosecond fiber laser
A pulsed fiber laser generating light pulses in the picosecond range has an adjustable pulsewidth. The fiber laser includes a figure-of-eight type laser cavity, preferably of...
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8139616 |
Pulsed light generator and pulsed fiber laser
A pulsed light generator of the invention includes: an excitation light source; a fiber grating into which excitation light from the excitation light source enters; a rare-earth doped optical fiber...
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8139617 |
Mode-locker comprising a graphene, and pulse laser device comprising the same
The present invention relates to a mode-locker including a graphene and a laser pulse device. The mode-locker mode-locks a laser that propagates through a laser oscillation loop. The mode-locker...
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8135048 |
Single-polarization high power fiber lasers and amplifiers
A novel polarization maintaining optical fiber, which can be used as a high-power polarization maintaining fiber laser or amplifier, is described. Insensitivity of the polarization state to...
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8130802 |
Tunable laser
A tunable laser includes an optical gain medium, a first resonator, a periodically tunable optical filter, and a second resonator in which light of a laser wavelength exhibits a round trip time T....
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8130799 |
Environmentally stable passively modelocked fiber laser pulse source
The present invention is directed to providing an environmentally stable, ultra-short pulse source. Exemplary embodiments relate to passively modelocked ultra-short fiber lasers which are...
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8126299 |
Production of optical pulses at a desired wavelength utilizing higher-order-mode (HOM) fiber
An apparatus and method for producing optical pulses of a desired wavelength utilizes a section of higher-order-mode (HOM) fiber to receive input optical pulses at a first wavelength, and...
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8121154 |
Thulium and/or holmium doped silicated glasses for two micron lasers
A laser glass fiber with a core of the fiber composition, comprising a silicate glass host, one or more glass network modifiers, one or more glass network intermediators, and Thulium ions, Holmium...
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8120775 |
Sensor device and for determining a physical value
A sensor device for determining a physical value using a laser, whose emission behavior can be affected by the physical value is described. The laser is arranged to emit at least two concurrent...
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8121155 |
Fiber laser based production of laser drilled microvias for multi-layer drilling, dicing, trimming or milling applications
Fiber lasers and methods for constructing and using fiber lasers for micro-/nano-machining with output beams including stacked pulses and combinations of continuous wave, pseudo-continuous wave and...
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8120841 |
Optical comb frequency source
This invention relates to methods and apparatus for generating an optical frequency comb. In embodiments a passive mode locked optical waveguide comb uses electrical or optical tuning for the mode...
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8102885 |
All-fiber mode selection technique for multicore fiber laser devices
An optical device that includes 1) a gain section having a plurality of core regions including dopant species configured to absorb incident radiation at a first wavelength and emit radiation at a...
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8098438 |
Power monitoring device for powerful fiber laser systems
A pig-tailed optical component used in a powerful fiber laser system is configured with a power monitor unit. The monitor unit has a plate-shaped beam splitter operative to reflect portions of at...
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8094370 |
Cladding pumped fibre laser with a high degree of pump isolation
An optical fibre laser or amplifier device is disclosed, comprising: a rare-earth-doped multi-clad optical fibre having at least three cladding layers, one or more multimode pump laser diodes, and...
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8094691 |
Yb: and Nd: mode-locked oscillators and fiber systems incorporated in solid-state short pulse laser systems
The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts...
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8094984 |
Semiconductor constructions, methods of forming semiconductor constructions, light-conducting conduits, and optical signal propagation assemblies
The invention includes optical signal conduits having rare earth elements incorporated therein. The optical signal conduits can, for example, contain rare earth elements incorporated within a...
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8089689 |
Apparatus and method for optical gain fiber having segments of differing core sizes
Apparatus and method for amplifying laser signals using segments of fibers of differing core diameters and/or differing cladding diameters to suppress amplified spontaneous emission and non-linear...
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8081667 |
Single-mode high power multimode fiber laser system
A high power single mode fiber laser system is configured with an active fiber including coextending multimode core (MM) and cladding around the MM core. The MM core is doped with one or more ions...
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8077747 |
Phosphate glass based optical device and method
An optical device includes an optical fiber having a core including multicomponent phosphate glasses, and a cladding surrounding the core, and a first fiber Bragg grating formed in a first portion...
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8077748 |
Hybrid waveguide laser with a fiber gain medium
A laser includes a gain stage and a pump stage. The gain stage includes a fiber link that terminates at a pair of ends and includes a doped fiber. The pump stage includes a glass volume, the glass...
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8077749 |
Pulsed laser source with adjustable grating compressor
Various embodiments described herein relate to a laser source for producing a pulsed laser beam comprising a plurality of ultrashort optical pulses having a variable repetition rate. In one...
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8073019 |
810 nm ultra-short pulsed fiber laser
Methods and systems for generating ultra-short fiber laser pulses are disclosed, including generating a signal laser pulse from a seed fiber laser; using a pulse stretcher comprising an input and...
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8073036 |
Beam stabilized fiber laser
A laser head generating ultrashort pulses is integrated with an active beam steering device in the head. Direct linkage with an application system by means of an adequate interface protocol enables...
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8073018 |
Laser pulse generating apparatus and method
Jitter and waveform are improved by reducing the wavelength spectrum width of a laser beam pulse. In a laser pulse generating apparatus according to the present invention, a semiconductor laser...
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8068520 |
Method for generating a laser pulse for the fine machining of workpieces using a fiber laser
Method for generating a laser pulse for the fine machining of workpieces using a fiber laser, the laser fiber of which is optically pumped by use of at least one diode laser which is operated by a...
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8064128 |
Deep blue extended super continuum light source
A new deep blue extended super continuum light source is provided wherein said super continuum at least extends to a low wavelength border λlow low below 480 nm comprising a pump source which ...
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8064490 |
Optical resonator and tunable laser
An optical resonator has a Y-branched waveguide including first, second, and third optical waveguides interconnected at a single point. The first optical waveguide leads toward a reflector. The...
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8059333 |
Blue extended super continuum light source
In a blue extended super continuum light source, when pulses of partly coherent monochromatic “pump” radiation of essentially constant amplitude are propagating through a microstructure fiber med...
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8054537 |
Light source apparatus
The present invention relates to a light source apparatus that has a base structure capable of generating SC light and further having a structure that enables the shaping of the spectral waveform...
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8040925 |
Broadband fiber laser
A broadband fiber laser provides a lasing cavity including a reflective minor and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein....
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8040926 |
Multi-core fiber for optical pumping device and manufacturing method thereof, optical pumping device, fiber laser and fiber amplifier
A multi-core fiber for an optical pumping device is provided. The multi-core fiber includes a plurality of optical fibers that are inserted into holes of an alignment member. The optical fibers and...
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8040927 |
Ring or linear cavity of all-fiber-based ultra short pulse laser system and method of operating the same
A ring-cavity or linear-cavity all-fiber-based ultra short pulse laser system and method of operating the same are provided. The all-fiber-based ultra short pulse laser system includes a pulse pump...
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8036253 |
Resonant Fabry-Perot semiconductor saturable absorbers and two photon absorption power limiters
An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in...
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8036252 |
Mid-infrared fiber laser using cascaded Raman wavelength shifting
A mid-infrared system for optical probing is disclosed that comprises a mid-infrared fiber laser based on cascaded Raman wavelength shifting, a sample volume, and a detector or detection system....
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8021636 |
Preparation of rare-earth halide blocks
The invention relates to a method of preparing a polycrystalline block of a halide of formula AeLnfX(3f+e) in which Ln represents one or more rare earths, X represents one or more halogen atoms...
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8014428 |
Mode-locked laser
The present disclosure provides in a first aspect a mode-locked laser for generating laser pulses. The mode-locked laser comprises an optical coupler and a first optical path capable of carrying...
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8014426 |
Optical device and method of controlling a refractive index profile in the optical device
An optical device includes an optical material comprising active dopant ions and absorber dopant ions spaced apart from the active dopant ions. The active dopant ions are provided to absorb a first...
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8008600 |
Fiber laser apparatus
The fiber laser apparatus comprises an amplifying section for amplifying seed light by cladding-pumping, and has a structure for further using a residual component of pumping light for...
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8009705 |
Fiber MOPA system without stimulated brillouin scattering
Methods and systems for increasing the threshold for stimulated Brillouin scattering are described. A seed source may generate one or more chirped seed pulses characterized by a pulse duration τ, ...
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8009706 |
Fiber laser light source
A fiber laser light source is provided with a laser resonator including a pair of fiber gratings optically connected to a fiber in a state that the fiber is interposed between the paired fiber...
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7995626 |
Athermal external cavity laser
Provided is an athermal external cavity laser (ECL), whose output optical power and output wavelength can be kept regular irrespective of temperature changes without using additional temperature...
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7991022 |
Optical pulse amplification based on stimulated Raman scattering
Techniques and apparatus for using stimulated Raman scattering in an optical gain medium to produce amplified laser pulses.
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7991021 |
Multimode raman fiber device with mode discrimination
A multimode optical fiber has a core that includes radially dependent dopant materials to provide a desired refractive index profile and a desired Raman gain coefficient profile. A laser diode pump...
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