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7602821 |
Device for generating laser radiation in the infrared
The invention is in the field of laser radiation generation in bands II and III, and relates to a device for generating laser radiation in the infrared having means for modifying the...
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7567593 |
System and method for fractional Raman order pumping in optical communication systems
An optical communication system includes a gain medium that is capable of receiving at least one optical signal that includes one or more optical signal wavelengths. The system also includes one or...
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7471448 |
Surface phonon-polariton raman laser
An optical device includes an input optical source that provides and optical signal to the optical device. A surface phonon polariton (SPP) nanostructure receives the optical signal that interacts...
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7420994 |
Pulsed cascaded Raman laser
A pulsed cascaded Raman laser ( 10 ) includes a pulsed light source ( 102 ) for generating a pulsed light ( 104 ) having an optical spectrum centered at a source wavelength. A non-linear Raman...
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7340143 |
Semiconductor Raman variable optical attenuator/amplifier and equalizer
A semiconductor-based optical amplifier/attenuator is disclosed. An apparatus according to aspects of the present invention includes an optical waveguide disposed in semiconductor material. A first...
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7277610 |
Optical fiber and system containing same
Optical fibers (e.g., fiber amplifiers and fiber lasers), and systems containing optical fibers (e.g., fiber amplifier systems and fiber laser systems) are disclosed.
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7266258 |
Two-photon absorption generated carrier lifetime reduction in semiconductor waveguide for semiconductor based raman laser and amplifier
A semiconductor based Raman laser and/or amplifier with reduced two-photon absorption generated carrier lifetimes. An apparatus according to embodiments of the present invention includes optical...
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7259906 |
System and method for voice control of medical devices
A light source includes a wavelength shifter that is capable of shifting a shorter optical signal wavelength to a longer optical signal wavelength based at least in part on a Raman effect in a...
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7236504 |
Stretched-pulse Raman fiber lasers and methods of operating the same
A method of operating a stretched-pulse Raman fiber laser includes producing laser radiation gain in a laser cavity using predominantly Raman amplification. Such a stretched-pulse Raman fiber laser...
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7230958 |
Raman amplifier and raman pumping method
Provided are a Raman amplifier and a Raman pumping method. A light source unit outputs a pumping light having a wavelength that periodically changes. A light intensity control unit varies a light...
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7173949 |
Laser effects and laser devices
A glass fiber ( 22 ) has a core ( 24 ) provided with Raman laser effect particles ( 28 ) embedded in a glass matrix ( 30 ), with glass cladding ( 26 ) around the core. The refractive index of the...
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7162119 |
Pump energy source, method of providing pump energy to an optical transmission system, and optical transmission system
It is disclosed a pump energy source ( 20 ) for providing pump energy (E_p) to an optical transmission system ( 100 ) transmitting an optical signal along an optical fiber, in particular an optical...
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7136401 |
Multiple output Raman fiber laser with stable and small output power for seed applications
Disclosed is a Raman laser device ( 10 ) having a first cavity in which lasing occurs at a first frequency, and at least one second cavity in which lasing occurs at a second frequency. Thereby...
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7120173 |
Method for illuminating particles for the purpose of forming their images
Peak power of a coherent light beam generated by a laser and injected into an optical fiber is chosen so that the spectrum of the light beam emanating from the fiber, for illuminating particles,...
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7113524 |
Narrow band high power fibre lasers with extended wavelength coverage
A fibre laser comprises a fibre light guide ( 3 ) having an active medium, a laser as pumping source ( 1 ) and a first pair of Bragg gratings ( 6, 8 ) forming a first resonator ( 4 ). The first...
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7072367 |
Systems for generating high-power short-pulse laser light
A method for generating ultra-short pulse amplified Raman laser light. Short pulse laser light is amplified, and a portion thereof is introduced into a Raman oscillator to produce compressed laser...
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7003001 |
Medical laser apparatus
A medical laser apparatus comprises: a solid laser oscillating source which emits a beam of a wavelength λ 1 in an infrared region of approx. 1040 nm to approx. 1080 nm; a first fiber-based Raman...
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7003002 |
Fiber-coupled microsphere Raman laser
The present invention is a Raman laser and methods related thereto. In the preferred embodiments, the Raman laser comprises a laser pump signal in a fiber waveguide which is optically coupled to a...
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6996135 |
Cascaded Raman laser
A cascaded Raman laser ( 10 ) has a pump radiation source ( 12 ) emitting at a pump wavelength λ p , an input section ( 14 ) and an output section ( 16 ) made of an optical medium. Each section (...
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6959021 |
Raman fiber laser
Fiber laser systems. One system comprises a pump energy source, a first fiber and a WDM for transferring pump energy from the first fiber to a second fiber that comprises a grating for reflecting...
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6934311 |
Semiconductor laser module and Raman amplifier
A semiconductor laser module has a Fabry-Perot type semiconductor laser device, an optical fiber, and first and second lenses. The tip of the optical fiber, on which the laser beam falls, is askew...
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6907051 |
Dynamically spectrally tailored raman pump laser
The present invention is directed to a system and method which provide a Raman pump which is spectrally tailored in response to feedback from control structure associated with the Raman pump...
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6901084 |
Stable solid state raman laser and a method of operating same
The present invention relates to a stable solid-state Raman laser, the solid-state Raman laser including a resonator cavity defined by at least two reflectors, a laser material located in the...
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6891865 |
Wavelength tunable laser
A wavelength tunable laser comprising a laser diode and a closed external cavity formed by one or more optical resonators either horizontally or vertically coupled to adjacent waveguides. The...
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6888667 |
Method and apparatus for silicon-based optically-pumped amplification using stimulated scattering
A semiconductor-based optical amplifier using optically-pumped stimulated scattering includes an optical signal source (pump) and a wavelength selective coupler. The coupler is connected to receive...
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6885683 |
Modular, high energy, widely-tunable ultrafast fiber source
A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Modularity is ensured by the implementation of interchangeable...
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6879604 |
Waveguide laser devices
A continuous wave laser device ( 40 ) comprises a convoluted path or fiber ( 43 ) of Raman laser material that has been micromachined on to a substrate, the laser material fiber being covered by...
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6876679 |
Systems and methods of operating an incoherently beam combined laser
In embodiments, the present invention is directed to systems and methods for operating an incoherently beam combined (IBC) laser. The IBC laser may comprise an integrated set of emitters or a set...
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6836487 |
Spectrally tailored raman pump laser
The present invention is directed to a system and method for providing a spectrally tailored Raman pump. The system and method employ an incoherently beam combined laser configuration to combine...
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6836488 |
Cascaded Raman fiber laser, and optical system including such a laser
The present invention relates to a cascaded multi-wavelength Raman fiber laser adapted for emitting radiation of at least one wavelength λ s1 , with a length of optical fiber ( 13 ) having input (...
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6822982 |
Device and method for providing a tunable semiconductor laser
A semiconductor laser device including a light reflecting facet positioned on a first side of the semiconductor device, a light emitting facet positioned on a second side of the semiconductor...
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6807197 |
Gain control in nonlinear polarization amplifier stages
A nonlinear polarization amplifier stage includes a gain medium operable, to receive a multiple wavelength optical signal. The amplifier stage also includes a pump assembly operable to generate at...
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6768750 |
Multi-spectral line Raman laser
A multiple spectral line Raman laser having adjustable relative power output between different spectral lines is provided. The laser includes a lasing cavity, first and second reflectors optically...
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6751240 |
Systems for generating short-pulse laser light
A method for generating ultra-short pulse amplified Raman laser light. Short pulse laser light is amplified, and a portion thereof is introduced into a Raman oscillator to produce compressed laser...
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6744556 |
Distributed Raman amplification system
In a distributed Raman amplification system, the pump laser and the fiber are chosen so as to have characteristics which result in broadening of the DRBS. For example, with a transmission fiber...
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6731423 |
Optical amplifier and method
A broad bandwidth optical amplifier ( 50 ) includes an optical pump source ( 52 ). A Raman chamber ( 56 ) is coupled to an output ( 54 ) of the optical pump source ( 52 ). An optical fiber ring (...
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6721088 |
Single-source multiple-order raman amplifier for optical transmission systems
In accordance with the invention, an optical fiber communication system comprising a source of optical signal channels and an optical fiber transmission line is provided with one or more single...
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6721091 |
System and method for controlling optical amplifier pumps
A system and method for controlling optical amplifier pumps. A path average intensity detector is provided for detecting a path average intensity for transmitted optical signals. In response to the...
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6717963 |
Raman fiber amplifier using a wide bandwidth continuous wave pump
A method and system by which a wide bandwidth continuous wave (CW) or substantially continuous wave composite (SCWC) pump with a flat spectrum is utilized to amplify an information-carrying signal....
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6700696 |
High order fiber Raman amplifiers
A Raman optical amplifier for amplifying an optical signal propagating in an optical fiber associated with an optical communications system. The amplifier includes a first Raman pump source...
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6693740 |
Dispersion managed discrete Raman amplifiers
An optical amplifier comprises: (i) an input port for providing optical signal to the amplifier; (ii) an output port for providing amplified optical signal out of the amplifier; (iii) at least two...
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6693737 |
Dispersion compensating nonlinear polarization amplifiers
A broadband nonlinear polarization amplifier includes an input port for inputting an optical signal having a wavelength λ. A distributed gain medium receives and amplifiers the optical signal...
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6690507 |
Double-pumped raman amplifier
A double pumped Raman amplifier is provided that increases gain over a same length of gain fiber without significantly increasing a percentage of noise. The amplifier may include a source of pump...
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6674773 |
Multi-wavelength Raman laser
A multi-wavelength Raman laser comprising a Raman fiber forming part of an optical ring, preferably most parts of which are formed by optical fiber. The ring includes a periodic filter selectively...
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6665114 |
Hybrid Raman-erbium optical amplifier
A hybrid optical signal amplifier is provided which includes the combination of a Raman amplifier and an EDFA assembly. The Raman amplifier has an output defined by regions of higher and lower gain...
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6657777 |
Interleaved lumped raman amplifier structure based on highly nonlinear fibers for densely spaced WDM channels
A modular interleaved Raman amplifier structure is exploited to reap the advantages provided by the high Raman gain coefficient and small effective area of highly nonlinear fibers without incurring...
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6657774 |
Amplifier system with distributed and discrete Raman fiber amplifiers
An amplifier system includes: (i) a distributed Raman fiber amplifier and; (ii) a discrete Raman fiber amplifier that includes dispersion compensated fiber. The discrete Raman fiber amplifier is...
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6646785 |
Fiber ring amplifiers and lasers
An optical amplifier is provided comprising an optical fiber ring, and a pump light emitting device providing a primary pump wavelength. The pump light emitting device is optically coupled to the...
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6624928 |
Raman amplification
In a first aspect, a Raman amplifier is pumped using pumps just above and below the fiber water peak. This enables lower power pumps to be used, as the high attenuation is avoided. In a second...
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6625347 |
Pumps for Raman amplifier systems
Raman amplifiers are provided for amplifying signals on optical communications links. The Raman amplifiers may be pumped using an unpolarized Raman pump source. Gain for the source may be provided...
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