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7450298 |
Optical signal waveform shaping apparatus
An optical signal and pump light are input to a nonlinear optical medium. In the nonlinear optical medium, the optical signal is amplified with a nonlinear effect caused by the pump light. A...
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7443574 |
Optical transmission system
An optical transmission system includes an optical nonlinear element having nonlinear input/output characteristics, a power detector detecting a power of a specific frequency component related to...
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7443573 |
Spatially-fed high-power amplifier with shaped reflectors
A spatially-fed high-power amplifier comprises one or more shaped reflectors to reflect an initial wavefront, and an active array amplifier to amplify the reflected wavefront to generate a...
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7440173 |
All fiber laser solution for spectral broadening and pulse stretching in a chirped pulse amplification fiber system
A fiber Chirped Pulse Amplification (CPA) laser system includes a fiber mode-locking oscillator for generating a laser for projecting to a fiber stretcher for stretching a pulse width of the laser...
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7440163 |
Compact passive module for erbium and other fiber amplifiers
Techniques for designing optical devices with passive components for erbium and other doped fiber amplifiers are disclosed. In one aspect, all passive components needed to construct optical...
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7440162 |
High power fiber chirped pulse amplification system utilizing telecom-type components
A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A...
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7437083 |
Wavelength converter
A wavelength converter for binary optical signals includes an interferometer structure ( 110 ) for generating an output signal by modulating a received local signal (LS) according to the modulation...
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7437070 |
Submarine observation apparatus and submarine observation system
In each of a plurality of submarine observation apparatus ( 1 to n), a branching unit ( 63 ) branches fixed-wavelength light (λ 1 ) from an incoming wavelength-multiplexed light signal. An...
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7436584 |
Optical amplifier module housed in a factory cable joint
An optical amplifier module is provided that contains at least one optical amplifier. The module includes an internal housing having an outer dimension substantially equal to an outer dimension of...
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7433116 |
Infra-red light source including a raman shifter
An infrared light source includes one or more combiners that are coupled to at least a first pump laser and a second pump laser. The combiners are operable to couple a first optical signal...
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7430351 |
Non-linear femtosecond pulse filter with high contrast
The invention relates to a non-linear optical filter capable of transmitting an electromagnetic pulse with a duration of less than about 1 picosecond, provided with means for generating an...
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7423803 |
1-μm phosphate-glass fiber amplified spontaneous emission (ASE) source
A phosphate glass 1-μm fiber ASE source provides high power and broadband emission that covers wavelengths on the short side of Yb-doped silica. A single-mode fiber formed from phosphate glass is...
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7417789 |
Solar-pumped active device
The present invention provides a solar-pumped active device which utilizes a holographic antenna grating on a solar energy silicon substrate to select specific diffracted wavelength and couple pump...
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7414779 |
Mode locking methods and apparatus
In one aspect the invention relates to a frequency varying wave generator. The generator includes a gain element adapted to amplify a wave having a wavelength; a time varying tunable wavelength...
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7403076 |
High frequency quasi optical power source capable of solid state implementation
In one embodiment, a high frequency quasi optical oscillator power source is provided which includes an array of amplifier devices each having an input antenna tuned for a fundamental frequency. A...
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7400440 |
Method and system for determining gain for an optical signal
A method for determining gain for an optical signal includes measuring a first power level that is an output power level of an optical signal at a first optical node, communicating the optical...
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7391558 |
Laser amplifier power extraction enhancement system and method
A high extraction efficiency laser system. The novel laser system includes a master oscillator for providing a laser beam, an amplifier adapted to amplify the laser beam, and an aberrator for...
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7391557 |
Mobile terawatt femtosecond laser system (MTFLS) for long range spectral sensing and identification of bioaerosols and chemical agents in the atmosphere
The present invention relates to a system for detection and identification of airborne biological, chemical and/or nuclear threats such as toxins, spores, bacteria, and viruses in real time at...
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7386209 |
Large mode area fibers using higher order modes
The specification describes an optical fiber device wherein a LOM is converted to an HOM prior to entering the gain section. The gain section is a few mode fiber that supports the HOM. The output...
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7379677 |
Method of wavelength conversion and wavelength converter
The wavelength converter comprises (1) an optical multiplexer for multiplexing an amplitude-modulated first light and reference light, which is continuous light having a wavelength different from...
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7379637 |
Method, optical device, and system for optical fiber transmission
The present invention relates to a method for optical fiber transmission which can increase a transmission distance. A first optical fiber having dispersion is first provided. An optical signal is...
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7379232 |
Fiber optic link gain control
An optical attenuator is included within an aircraft decoy driver system for driving a fiber optic towed decoy system to compensate for variability in the fiber optic connection to the towed decoy...
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7371966 |
High speed active flex cable link
A method and apparatus, in some embodiments the apparatus includes a flex cable terminating at a first end and a second end and having a plurality of conductors therein, and a repeater circuit...
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7369779 |
Regeneration of optical phase modulated signals
A regenerator for restoring the originally encoded optical phase of a differential-phase-shift-keyed signal. In an embodiment, the regenerator simultaneously provides limiting amplification and...
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7355785 |
Gain-clamped semiconductor optical amplifier
A gain-clamped semiconductor optical amplifier is disclosed. The amplifier includes a gain waveguide for amplifying an optical signal input to the gain waveguide, and a grating layer, in contact...
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7352506 |
Method and system for sensing environmental characteristics
A system for sensing characteristics of the environment is disclosed. Sensors utilize exponential growth of a signal initiated by interaction of a sensor element with characteristics of the...
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7340124 |
Optical switch using rare earth doped glass
The present invention provides an optical switch including a loss element having a signal loss, and a rare earth doped gain element optically connected in series with the loss element. The rare...
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7339723 |
Optical transmission system, optical repeating apparatus, and quality supervising method
An optical transmission system includes an optical fiber transmission line, one or more optical repeating apparatuses, an optical receiving apparatus, and a transferring route for transferring a...
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7330304 |
Method and apparatus for PPM demodulation using a semiconductor optical amplifier
An optical pulse position modulation receiver relying on the gain dynamics in a semiconductor optical amplifier (SOA). Optical PPM signal pulses and periodic optical clock pulses at a different...
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7330301 |
Inexpensive variable rep-rate source for high-energy, ultrafast lasers
System for converting relatively long pulses from rep-rate variable ultrafast optical sources to shorter, high-energy pulses suitable for sources in high-energy ultrafast lasers. Fibers with...
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7308182 |
Optical amplifiers
An optical amplifier comprises a printed circuit board (PCB) having at least one support layer of electrically non-conducting material and at least one conductive layer of electrically conducting...
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7298546 |
Ultraviolet light source, laser treatment apparatus comprising ultraviolet light source, and exposure apparatus comprising ultraviolet light source
An ultraviolet light source ( 1 ) comprises a laser light source ( 10 ) for generating a signal light in the infrared region, a optical amplifier ( 20 ) which comprises fiber optical amplifiers (...
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7274010 |
Semiconductor optical amplifier device amplifying an externally applied light signal, semiconductor optical amplification driving device and semiconductor light receiving apparatus
A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is...
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7259904 |
Coarse spectrometer with a grating
A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid...
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7245420 |
Master-oscillator power-amplifier (MOPA) excimer or molecular fluorine laser system with long optics lifetime
The lifetime of optical components used in deep-UV (DUV) excimer laser systems, including systems in a MOPA configuration, can be increased by reducing the intensity of pulses incident upon these...
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7245419 |
Wavelength-stabilized pump diodes for pumping gain media in an ultrashort pulsed laser system
In an optical amplifier, passively wavelength-stabilized pump diodes generate pumping light to excite a gain medium (e.g., rare-earth-ion doped optical fiber or solid-state optical amplifier) near...
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7242518 |
Standing wave amplifiers and oscillators
An apparatus and method for building three-dimensional spatial power combiners for efficiently combining power from a large number of active devices are being disclosed. The apparatus discloses a...
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7242517 |
Optical devices comprising series of birefringent waveplates
Bidirectional isolating devices including non-reciprocal rotators (i.e. Faraday rotators) and wavelength selective reciprocal polarization rotators are disclosed. Each wavelength selective rotator...
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7239442 |
Optical frequency comb generator
An optical frequency comb generator includes an oscillator ( 117 ) for oscillating modulating signals of a preset frequency, and an optical resonator ( 110 ) formed by an incident side reflecting...
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7209603 |
Acousto-optical device based on phonon-induced polaritonic band gaps
The device comprises an optical waveguide and an acoustic wave generating device. The waveguide has an optical band gap and a sharp electronic transition (e.g. an excitonic transition) in the band...
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7200303 |
Method for fabricating optical devices by assembling multiple wafers containing planar optical waveguides
An optical device comprises a first substrate wafer with at least one buried optical waveguide on an approximately flat planar surface of the substrate and a second substrate wafer with at least a...
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7199921 |
Two stage optical amplifier
The invention describes a system of two-stage optical amplifiers adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifiers in a way suitable...
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7196840 |
Amplitude balancing for multilevel signal transmission
Arrangements are provided for an amplitude balanced optical amplifier. A combination of an optical preamplifier and a gain/loss variation modification device (VMD) is employed. The gain/loss VMD...
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7196839 |
Super-continuum UV source
An ultraviolet super-continuum source with a fiber-optic may be provided with direct stimulation by a laser having a relatively narrow bandwidth, for example, less than the typical Raman shift in...
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7196838 |
High density optical packaging
Repeaters for use in amplifying optical data signals transmitted through undersea fiber optic cables are disclosed. Raman amplification schemes using 100 or more pump lasers are integrated into...
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7193771 |
Power scalable optical systems for generating, transporting, and delivering high power, high quality laser beams
Power scalable, rectangular, multi-mode, self-imaging, waveguide technologies are used with various combination of large aperture configurations, 20, 50, 80, 322, 324, 326, 328, 330, 332, 334,...
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7190872 |
Semiconductor optical amplifier and optical module using the same
The present invention provides a polarization dependency-free, gain-saturated high function semiconductor optical amplifier and optical module at industrially low cost. The gist of the present...
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7190861 |
Monolithic semiconductor light source with spectral controllability
The invention is in the field of distributed Raman amplification for digital and analog transmission applications and other applications, e.g., instrumentation and imaging applications, including...
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7186033 |
Fiber optic booster connector
An apparatus includes a housing, a first connection interface and an optical amplifier. The housing receives a fiber optic line and an electrical line. The first connection interface is located at...
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7184623 |
Apparatus, system and method for an adiabatic coupler for multi-mode fiber-optic transmission systems
An improved fiber-optic communications system comprises a multi-mode waveguide carrying an optical signal, a single-mode waveguide optically coupled to and receiving the optical signal from the...
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