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Topic: Optical amplifier

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Optical amplifier - Wikipedia, the free encyclopedia Fiber amplifiers are optical amplifiers which use a doped optical fiber, which bears the communication signal, and is optically pumped with a laser having a high-powered continuous output at an optical frequency slightly higher than that of the communication signal. An optical amplifier is essentially a laser without an optical cavity, or one in which feedback from the cavity is suppressed. In optics, an optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal, then amplify it electrically, and finally reconvert it to an optical signal. en.wikipedia.org /wiki/Optical_amplifier   (779 words)

Optical parametric amplifier - Wikipedia, the free encyclopedia An optical parametric amplifier, abbreviated OPA, is a laser light source that emits the light of variable wavelengths by an optical parametric amplification process. After separation of the signal light from the OPG outputs, the remaining idler passes through a nonlinear optical crystal collinearly with the light of the same wavelength as the pump, and the stronger output of the same wavelength as the signal and idler is acquired as the output of the OPA. The photon of an incident laser pulse (pump) is divided into two photons, the sum energy of which is equivalent to the energy of the photon of the pump, by a nonlinear optical crystal. en.wikipedia.org /wiki/Optical_parametric_amplifier   (666 words)

Optical amplifier - Patent 5706126 The optical amplifier according to this invention is equipped with a light-amplifying section 10 for directly amplifying inputted light, an optical branching coupler 21 placed at the output side of the light-amplifying section 10, and a light sensor 31 for receiving branching light from the optical branching coupler 21 for measurement of the level. A second optical branching coupler and a second light sensor are additionally provided at the output side of the optical amplifier, in addition to a first optical branching filter for branching part of the light outputted from the optical amplifier and a first light sensor for measurement of the level of the branching light. The optical amplifier according to this invention is different from the configuration of the prior art wherein part of the light amplified and outputted through the light-amplifying section is directly subjected to measurement of the level to control the feedback. www.freepatentsonline.com /5706126.html   (4064 words)

Distributed optical amplifier, amplifying method, and optical communication system - US Patent 6512628 The WDM optical signal propagated through the optical transmission line 52 from the terminal A 51 is incident to the optical amplifier 59 via the pumping part 58, then optically amplified to the predetermined level and thereafter transmitted to the optical transmission line for the transmission to the other terminals. The present invention relates to a distributed optical amplifier and a distributed optical amplifying method for adjusting an incident power of the light to be amplified depending on the optical power of pump light, considering the non-linear optical effects generated in the light to be amplified. The centralized optical amplifier is an optical amplifier wherein an optical amplifying medium and a pump light source are centralized in one area. www.patentstorm.us /patents/6512628.html   (12890 words)

Optical fiber amplifier and optical amplifier repeater - Patent 5721635 The optical fiber amplifier in the optical repeating and transmitting apparatus may include i) an amplifying fiber which is doped with a rare earth element and ii) an excitation device which generates excitation light for amplifying the signal light and supplies the excitation light to the amplifying fiber. The optical fiber amplifier of the present embodiment reduces the wavelength dependency in a predetermined wavelength range with a combination of optical fibers having plural kinds of compositions, utilizing the wavelength dependency of the gain due to a type of dopant, a doping concentration and a change of the length of the optical fiber. Namely, in the optical amplifier repeater 640, the signal light transmitted through the optical fiber transmission path 617 selectively passes through the isolator 745a only in the direction of progress of the input signal light and is input, by way of the multiplexer 743a, to the EDF 741a of the first optical fiber amplifier 746a. www.freepatentsonline.com /5721635.html   (12283 words)

Optical Amplifiers Normally employing a hybrid optical amplifier, consisting of two separate optical amplifiers, allows for separate amplification, one for the lower 40 nm band and the second for the upper 40 nm band. Raman optical amplifier is little more that a high-power pump laser, and a WDM or directional coupler. Semiconductor optical amplifiers (SOAs), erbium doped fiber amplifiers (EDFAs), and Raman optical amplifiers lessen the effects of dispersion and attenuation allowing improved performance of long-haul optical systems. www.fiber-optics.info /articles/op-amp.htm   (1941 words)

World's First Semiconductor Optical Amplifier with Signal Waveform Reshaping Function at 40Gbps Optical technology capable of restoring degradation of optical signals to their original quality without converting them into electronic signals is known as all-optical 3R regeneration(3), consisting of re-amplification, re-shaping, and re-timing. Optical 3R regeneration is technology whereby a degraded signal is restored to its original quality, and consists of Re-amplification, Re-timing, and Re-shaping (3R). In the past, as optical signals were regenerated by converting them into electronic signals and using electronic circuits for regeneration, optical regeneration required large and complex regenerators. www.physorg.com /news3261.html   (1017 words)

Harmonic Inc.   Optical amplifiers are also available for Harmonic’s PWRBlazer™ nodes. Harmonic offers broadcast and gain-flattened optical amplifiers to enhance the power and capabilities of the MAXLink™ 1550 nm and METROLink™ DWDM transmission systems. The 1-RU HOA 7220 amplifier is wide band gain-flattened for amplification of up to 40 DWDM signals in the range from 1530 to 1564 nm. www.harmonicinc.com /view_ban_product_group.cfm?classID=635   (263 words)

Altamar Networks Announces the Orion Optical Amplifier The Orion Optical Amplifier is now available for shipment to network equipment manufacturers and pricing will be released to customers upon request. In addition to its power management and gain control capabilities, Orion's third generation optical amplifier design enables single wavelength protection switching, which minimizes the amount of network bandwidth allocated to restoration. Altamar Networks developed the Orion in response to demand by service providers for optical amplifiers that could meet the dynamic requirements of next generation DWDM networks. www.ditechcom.com /newsroom/newsdetail.aspx?newsid=80   (386 words)

C-DOT Optical Amplifier System Optical Fiber Amplifiers (OFA), particularly those based on fiber doped with the rare earth ions, have received a tremendous level of interest in recent years. Optical Amplifiers, on the other hand, can boost the signal without involving unnecessary opto-electronic conversions and do not suffer from such drawbacks. The most common form of amplifier currently available is Erbium Doped Fiber Amplifier (EDFA). www.cdot.com /coba.htm   (285 words)

Optical amplifier claims no distortion: News from Kamelian Unlike other linear optical amplifiers the new Kamelian OLA technology allows the gain to be varied while ensuring linear operation and maintaining high output power. optical amplifier (SOA) technology offers a cost-effective alternative to EDFAs (erbium-doped fibre amplifiers). Optical amplification is a key technology in modern telecommunication systems and SOAs can provide a low cost and small footprint solution. www.electronicstalk.com /news/kam/kam102.html   (445 words)

Information Bridge: DOE Scientific and Technical Information Fiber amplifiers such as the erbium-doped fiber amplifier have revolutionized the fiber-optics industry and are enjoying widespread use. Semiconductor optical amplifiers (SOAs) are an alternative technology that complements the fiber amplifiers in cost and performance. Optical amplifiers are essential devices for optical networks, optical systems, and computer communications. www.osti.gov /bridge/product.biblio.jsp?osti_id=792781   (319 words)

semiconductor optical amplifier Semiconductor optical amplifiers exhibit many non-linear properties and a substantial body of work has been done to exploit these properties for switching, wavelength conversion, signal regeneration and gating. All-optical switches are necessary to fully realize the high capacity of optical telecommunications systems. Recently there have been reports of a new type of non-linear behaviour which causes rotation of the polarization state of an input beam and furthermore the polarization state of the output beam depends on the intensity of the input beam. www.eeng.dcu.ie /~landaisp/soa.htm   (150 words)

Adaptive optical amplifier control An error veсtоr is computed to signify a distinction between relevant deteсted quantities and target quantities of a argument of a beam beam downstreаm of the optical amplifier. In approach of managing an optical amplifier dynamically adapts to together arrangement and performаnce alterations of a connections arrangement. As a outcome, optimization of the amplifier control variabIes is рerfоrmed bаsed оn a sensitivity matrix thаt precisely refIects the performаnce of the amplifier. www.patentalert.com /docs/530/z53097957.shtml   (154 words)

Ditech Communications Announces Next Generation Optical Amplifier Ditech's Quasar provides what the company believes is the most stable optical amplifier for next generation network applications, capable of restoring optical signal stability (called transient response time) within 50 millionths of a second. However, as an optical channel is added or dropped from an amplifier, the signal power of the other optical channels will fluctuate. "Because optical amplifiers eliminate the costly optical-to-electrical regeneration of an optical signal, they were the key enabler for the first generation of point-to-point WDM networks," said Ian Wright, Ditech's Senior Vice President of Engineering for Optical Networking Products. www.ditechcom.com /newsroom/newsdetail.aspx?newsid=39   (533 words)

physics - Laser Erbium-doped fiber lasers, a type of laser formed from a specially made optical fiber, which is used as an amplifier for optical communications. A laser medium can also function as an optical amplifier when seeded with light from another source. The amplified signal can be very similar to the input signal in terms of wavelength, phase, and polarisation; this is particularly important in optical communications. www.physicsdaily.com /physics/Laser   (2031 words)

Optical parametric amplifier - Wikipedia, the free encyclopedia An optical parametric amplifier, abbreviated OPA, is a laser light source that emits the light of variable wavelengths by an optical parametric amplification process. After separation of the signal light from the OPG outputs, the remaining idler passes through a nonlinear optical crystal collinearly with the light of the same wavelength as the pump, and the stronger output of the same wavelength as the signal and idler is acquired as the output of the OPA. The photon of an incident laser pulse (pump) is divided into two photons, the sum energy of which is equivalent to the energy of the photon of the pump, by a nonlinear optical crystal. en.wikipedia.org /wiki/Optical_parametric_amplifier   (2031 words)

Optical Amplifier Suppliers from the PowerSourcing Directory of Optical Amplifier Find a supplier of optical amplifier and thousands of other products and services for purchasing and research. We are dedicated to bringing qualified optical amplifier buyers and suppliers together. Power Sourcing is your best source for finding optical amplifier suppliers. www.powersourcing.com /sf/opticalamplifier.htm   (255 words)

OPTICAL AMPLIFIER - Pirelli - January, 1998 It has an optical service line at 1300 nm that is multiplexed and demultiplexed into a traffic-carrying fiber, bypassing the bidirectional optical amplifiers. The new 4 3 4 Bidirectional Optical Amplifier System from Pirelli allows bidirectional transmission of eight wavelengths over a single fiber. By extending the transmission distance between the terminal equipment or regenerator sites, this system increases fiber capacity by 700 percent, the company says. www.photonics.com /spectra/newprods/XQ/ASP/newprodidfo.865/QX/read.htm   (105 words)

Unique All-Optical Amplifier Systems The results of the work will be optical amplifier modules, which have a reduced complexity and draw less power than most modern systems. Potential applications for this technology include lower pump power optical fiber amplifiers, single pixel multicolor displays, and numerous other light emitting devices in which power draw is currently an issue. Clemson University researchers are developing novel all-optical amplifier systems that uniquely integrate drive and operational componentry. www.clemson.edu /research/ottSite/techs/nopatent/00158.htm   (118 words)

Gain Characteristics of a Vertical Transmission Optical Amplifier (ResearchIndex) Abstract: A vertical transmission optical amplifier with a multiple active layer structure has been fabricated and the single pass gain has been measured for the first time. Gain characteristics of a vertical transmission optical amplifier (1995) Making the most of the speed of light, optical signal data should be conveyed in the form of light from one board to another. citeseer.ist.psu.edu /191594.html   (207 words)

LambdaDriver Optical Amplifier Module Optical Amplifier modules are a family of low-noise Erbium-Doped Fiber Amplifiers (EDFA) ideal for Metro and Long-Haul Dense Wavelength Division Multiplexing (DWDM) as well as Single Wavelength applications. The optical design, coupled with sophisticated control circuitry, allows these Optical Amplifiers to provide constant gain even with wavelengths being added or dropped in the network. Any fluctuations caused by wavelengths addition/removal can be handled by its ultra-fast transient suppression. www.mrv.com /product/MRV-LD-LD_OAM   (125 words)

Optical amplifier for space applications We describe an optical amplifier designed to amplify a spatially sampled component of an optical wavefront to kilowatt average power. R. Fork, S. Cole, W. Diffey, L. Gamble, and A. Keys, "Optical amplifier for space applications," Opt. Lee Casperson and Amnon Yariv, "The Gaussian Mode in Optical Resonators with a Radial Gain Profile," Appl. www.opticsexpress.org /abstract.cfm?URI=OPEX-5-12-292   (479 words)

Optical amplifier - a reference guide from Electronicstalk We see from your search that you're looking for information on the term "Optical amplifier", and we have a large number of manufacturers' news releases and technical articles here on Electronicstalk which will be of interest. In May 2004, we covered the news from Bookham - take a look at Acquisition to boost optical amp capabilities which says: "Bookham Technology has entered into an agreement to acquire Onetta, a leading provider of optical amplifier modules and subsystems for communications networks, based in Sunnyvale, California.". Optical amplifier - a reference guide from Electronicstalk www.electronicstalk.com /guides/optical-amplifier.html   (226 words)

Optical Amplifier - compare prices, reviews and buy at NexTag - Price - Review The Optical Audio Cable can be used for receivers, amplifiers and mini discs with a digital connector. Optical Amplifiers and Their Applications: Santa Fe, Nm, June 24-25, 1992 Selected Papers on Optical Parametric Oscillators and Amplifiers and Their Applica... www.nextag.com /optical-amplifier/search-html   (132 words)

Finisar: Optical Transceivers and Passives: Linear Optical Amplifier The Linear Optical Amplifier (LOA) was designed to meet the demands of flexible, smaller size, lower cost systems. Finisar: Optical Transceivers and Passives: Linear Optical Amplifier www.finisar.com /optics/LinearOpticalAmplifier.php   (26 words)

Semiconductor Optical Amplifier: Global Market Forecast This forecast covers semiconductor optical amplifiers for each significant wavelength range, including 750-1050 nm, 1300-1500 nm, 1500-1700 nm. The report is presented in a format most convenient for semiconductor optical amplifier market and product. The forecast for each amplifier type is further segmented into discrete packaged versus integrated (monolithic multidiode) SOAs, and further segmented into each end application. www.mindbranch.com /listing/product/R56-119.html   (169 words)

Patent 5936739: Gated frequency-resolved optical imaging with an optical parametric amplifier A short-pulse optical parametric amplifier is capable of ultrafast temporal gating, direct two-dimensional image acquisition, and spectral conversion over a broad wavelength range defined by the signal/idler tuning curve, quantum sensitivity approaching one photon per spatial resolution element, and a high degree of coherent discrimination against diffuse light obscuration of image quality. Noninvasive optical imaging diagnostics to quantitatively measure absorption and scattering characteristics of biological tissues are a fundamental prerequisite for a growing number of physiological monitoring procedures and preventative protocols, such as cerebrovascular oxygenation status, photodynamic dosimetry, transillumination shadowgraphy of malignant lesions, and dermatological and ocular photopathology. The near-infrared is the spectral region of greatest optical transparency, but multiple scattering is pervasive in fatty tissue at these wavelengths and hinders image formation and the determination of absorption coefficients. www.freepatentsonline.com /5936739.html   (169 words)

Encyclopedia of Laser Physics and Technology - parametric amplifiers, periodic poling, phase matching, photodiodes, Pockels cells This makes parametric amplifiers attractive for the generation of wavelengths which are very hard to access directly with lasers (due to the lack of suitable gain media), or when properties like a large tuning range or a high gain in a short length are required. Optical fibers always exhibit some degree of birefringence, even if they have a circularly symmetric design, because in practice there is always some amount of mechanical stress which breaks the symmetry. In optical fibers, there is usually some slight difference in the propagation characteristics of light waves with different polarizations – even for fibers which according to the design should have a perfect rotational symmetry and thus no birefringence. rp-photonics.com /encyclopedia_p.html   (169 words)

Hama Optical Amplifier Repeater The Hama Optical Amplifier Repeater is particularly useful for set ups with very long transmission lengths, bending radii or when using several Optical fragment selectors and transition/extension adapters The Hama Optical Amplifier Repeater will boost optical (Fibre Optic/Toslink) signals. It should improve your optical signal and can make a lot of difference especially to multi room systems. www.beststuff.co.uk /hama_optical_amplifier.htm   (130 words)

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