Thulium fiber amplifiers operating in the 2 m region for applications such as lidar or spectroscopy e. Rp photonics encyclopedia fiber amplifiers, edfa, ydfa. An efficient fluoridebased thuliumdoped fiber amplifier tdfa is theoretically demonstrated using a doublepass scheme. In terms of gain saturation, fiber amplifiers are very different from semiconductor optical amplifiers soas. Rp photonics encyclopedia rareearthdoped fibers, erbium. The book guides the reader from the most fundamental aspects of fiber amplifiers all the way to system design and applications. Coractive tm doped fibers are available in singleclad or doubleclad configurations. Twomicron thuliumdoped fiber lasers achieve 10 kw peak power. Thulium fiber amplifier is designed for scientific and sensing applications between 1900 and 2050nm.
The system designed amplifies a set of 16 channels in the sband going from 1450 nm to 1525 nm. The thuliumdoped fibers are promising candidates for optical amplification in the optical telecommunication sband 14601530 nm. Simphosoft webinar modeling pulsed and cw tmdoped optical. Theoretical modelling of sband thuliumdoped silica fibre. Ask rp photonics for any advice concerning the use of rareearthdoped fibers e. Thulium doped fibers are used for operation around 2 microns. Thuliumdoped laser and amplifier fibers from nufern. We investigate the stimulated brillouin scattering sbs effect in highpower thuliumdoped fiber amplifier seeded with a narrowlinewidth fiber superfluorescent source or a conventional narrowlinewidth fiber laser.
Thulium fiber amplifier with prebooster stage keopsys. Three different amplifier lengths are simulated and the gain curve is plotted in the report page. The software takes in account the amplified spontaneous emission. Since the probability of nonradiative decay of the lasing transition of thulium in conventional silicabased fibers is high, a fluoridebased fiber host with a lower phonon energy is often used. The results required were gathered from the software. Thuliumdoped fiber amplifiers tdfas operating around 2 m offer the broadest gain. The software takes in account the amplified spontaneous. Thuliumdoped fiber amplifier tdfa are considered for longhaul transmission systems as they allow amplification in the sband 1. The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbium doped fiber amplifier edfa. Thuliumdoped fiber amplifier, numerical and experimental approach lasers and electrooptics research and technology s. For example, rp photonics has sophisticated modeling software for simulating the performance of rareearth doped fiber lasers and amplifiers definition. In this paper we report the design and performance of a multistage highpower pm tmdoped fiber amplifier, cladding pumped at 793 nm. Simulation of dual stage thuliumdoped fiber amplifier using pump.
Pdf thuliumdoped fiber amplifier for optical communications at. However, those regions have not seen any significant commercial use so far and so those amplifiers have not been the subject of as much development as the edfa. Thuliumdoped fiber amplifier development for power scaling the 2 micron. We report the realization of a thulium doped fiber amplifier designed for optical communications providing high gain 35db and low noise figure.
Due to the small transition cross sections, the saturation energy is fairly high, e. Gain in the sband is demonstrated in a thuliumdoped tellurite fiber amplifier using dual pump and bidirectional pumping schemes. Doped fiber amplifier and fiber laser file exchange. In this regard, a tmdoped fiber amplifier was recently shown to have a unique. Thuliumdoped fiber amplifier for optical communications at 2 m. A genetic algorithm is used to optimize the pump scheme parameters in order to achieve the maximum gain or the minimum nonuniformity of the gain spectrum.
Thuliumdoped fiber amplifier for optical communications at. Abstract we describe the development and testing of a. The photonics crystal fiber was 10 cm in length and effectively acted as a machzehnder interferometry element with a. Pdf diodepumped wideband thuliumdoped fiber amplifiers for. Each fiber laser is constructed using a thuliumdoped fiber as the gain medium and two fiber bragg gratings to select the laser wavelength. Rare earth doped fibers for use in fiber lasers and.
The software rp fiber power can be used for analyzing and optimizing fiber amplifiers. We report the first demonstration of a unidirectional, isolatorfree 2. Simulation of the ultimate characteristics of thuliumdoped. The presented high power broadband and narrowband superfluorescent fiber source could be of great interest and open up the prospect of many new applications such as laser materials processing and metrology. Thulium doped fiber amplifiers have been used in the sband 14501490 nm and praseodymium doped amplifiers in the 0 nm region. The model is spectrally and spatially resolved and is general in terms of pumping scheme used. Thuliumdoped fiber optic components cutting tool engineering. Gain in the sband is demonstrated in a thulium doped tellurite fiber amplifier using dual pump and bidirectional pumping schemes. Manufactured for demanding environmental conditions, the device is robust and reliable. In one example, we will amplify a short pulse that is in the nanosecond time range. Thuliumdoped silica fibers with enhanced 3h 4 level lifetime. The design allows proposing wide or small wavelength range. No random backward sbs pulses are observed when using a narrowlinewidth fiber superfluorescent source as the seed.
Ask rp photonics for any advice concerning the use of rareearth doped fibers e. The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbiumdoped fiber amplifier edfa. Rare earth doped fibers for use in fiber lasers and amplifiers the advances in performance of fiber lasers have been dramatic in the last 10 years, making fiber. A stable dualwavelength thuliumdoped fiber laser at 1. Thuliumdoped fiber amplifier, numerical and experimental. Afs ultrafast fiber lasers are characterized by an outstanding performance combined with flexibility and maximum stability. All supported by our gainmaster simulation software to help you design even the most complex edfas. Simulation and design of a multistage 10w thuliumdoped. Optimizing the thulium doped fiber amplifier tdfa gain and. Oct 10, 2009 a completely spatially and spectrally resolved model of a thulium doped fiber amplifier that, unlike existing models, takes into account the radiation mode structure is proposed. Afs offers the highest performance among commercially available 2m fiberbased ultrafast laser systems. Fibercore offers a number of different doped fibers including erbium doped fiber for various c and l amplifier configurations and ase applications. Advances in thulium doping technology provide improved pumping efficiency, yielding power output 1 kw for gain fibers. Demand on higher bandwidth bring about to use the other rare earth doped fiber such as thulium doped fiber amplifiers tdfas.
We report the first experimental realization and detailed characterization of thulium doped fiber amplifiers tdfas specifically designed for optical communications providing high gain 35 db, noise figure as low as 5 db, and over 100 nm wide bandwidth around 2 m. Thuliumdoped silicabased optical fibers for cladding. A stable dualwavelength thuliumdoped fiber laser operating at 1. Thuliumdoped fiber amplifier for optical communications at 2. Numatch technology matches mechanical and optical characteristics. Model for a thuliumdoped silica fiber amplifier pumped at. Doped optical fiber amplifiers pt3 reflective amplifier in reflective edfas, a device e. Cw thulium fiber amplifier with polarization maintaining. A line of thuliumdoped fiberoptic components enable construction of fiber lasers and oscillators operating at 2.
Corepumped thulium fibers were prepared inhouse using the modified chemical vapor deposition method. With a broad bandwidth from 1900 to 2050nm, keopsys recommends its cw thulium fiber amplifier. Doped optical fiber amplifiers pt3 archives optiwave. The ultimate information characteristics of the amplifier are. Thulium doped floridebased fiber amplifier listed as tdffa. Isolatorfree unidirectional thuliumdoped fiber laser.
A central emission wavelength of 2 m generated by thuliumdoped amplifiers has enabled a multitude of new applications. Devices operating in the region of wavelengths around 2 m receive growing attention nowadays because they can be used for socalled eyesafe applications, e. Thulium fibers are used for eyesafe fiber laser applications. Thuliumdoped silicabased optical fibers for cladding pumped.
May 26, 2015 the first implementation of active fiber optic amplifier was demonstrated in 1994 with erbium doped fiber amplifier edfa. Thuliumdoped fiber amplifier for optical communications at 2m. Development of thuliumdoped fibre amplifiers for the 2. Radiation effects on the gain of thulium doped fiber. Apr 11, 2016 high power qswitched thulium doped fibre laser using carbon nanotube polymer composite saturable absorber. The thulium ions can be excited to a highlying electronic level 1 g 4. Coractive thulium doped fibers are specifically designed for either pulsed or cw applications. Fiber lasers tmdf200 40910 a thulium doped fiber with an absorption of 200 dbm at 790 nm.
Thulium doped single mode and largemodearea optical fibers applications plastics and polymer cutting, engraving, and welding excitation of biological and waterbased samples industrial and medical lasers lidar systems pumping solid state crystal lasers click to enlarge crossrelaxation occurs in tm doped fiber when. Stimulated brillouin scattering suppression of thuliumdoped. Apr 18, 2006 thuliumdoped fiber amplifier tdfa are considered for longhaul transmission systems as they allow amplification in the sband 1. Characterization of a thuliumdoped silicabased optical. Thuliumdoped fiber amplifier for optical communications. This amplifier provides a peak gain of 25 db at 2040 nm with a 15 db gain window spanning the wavelength range 2030 2100 nm with an external noise figure nf of 46 db. Model for a thuliumdoped silica fiber amplifier pumped at 1558nm. Demand on higher bandwidth bring about to use the other rare earth doped fiber such as thuliumdoped fiber amplifiers tdfas. A thuliumdoped fiber amplifier tdfa is often used for light amplification in the near infrared nir. The twostage claddingpumped thuliumdoped allfiber amplifiers were used directly to boost average power to 120 w, the center wavelength and the fwhm were 1963. Thulium doped fiber amplifier development for power scaling the 2 micron coherent laser absorption instrument for ascends mark w.
Fibers free fulltext thuliumdoped silica fibers with. Simulation and design of a multistage 10w thuliumdoped double. In the present paper, the thulium doped fiber amplifier tdfa has been irradiated by a neutron beam of different doses for various exposure times from an am241be9 neutron source. Thuliumdoped silica fibers with enhanced h4 level lifetime. We report the realization of a thulium doped fiber amplifier designed for optical communications providing high gain 35db and low noise figure fiber optics amplifiers and oscillators. The 1550nm long pulse single frequency polarization maintaining.
The pump power and thuliumdoped fiber tdf length for singlepass thuliumdoped fiber amplifiers tdfa are theoretically optimized to achieve the optimum gain and noise figure nf at. We report on a flat and broadband thulium doped amplified spontaneous emission ase fiber source working around 1. This paper presents the static behavior of thuliumdoped fiber amplifier tdfa operating around 2. Presently tdfa are fluoride based because of the low phonon energy of this glass. Erbium doped fiber amplifiers has been written by early pioneers in the development of fiber amplifier technology and optically amplified systems. The model considers the influences of the amplified spontaneous emission ase noise, the wavelength and the power of the seed, the thuliumdoped fiber length and the pumping power into the tdfa. A new range of thuliumdoped fiber optic components from coherent nufern enables construction of fiber lasers and oscillators operating at 2 m with higher output power than was previously possible. The pump power and thulium doped fiber tdf length for singlepass thulium doped fiber amplifiers tdfa are theoretically optimized to achieve the optimum gain and noise figure nf at the center of sband region. Thulium doped fibre optic components electro optics. Thuliumdoped tellurite fiber amplifier request pdf.
High power qswitched thulium doped fibre laser using carbon nanotube polymer composite saturable absorber. In the second example, we will show how to model an approximately continuouswave cw interaction in a thuliumdoped material. Due to the low phonon energies of the zblan glass, the levels 3 h 4 and 3 f 2 are metastable not quenched by multiphonon transitions. Thuliumdoped silicabased optical fibers for claddingpumped. Highly thuliumdoped silicate glass fibers can be used to develop singlefrequency fiber lasers with 1. For the first time we demonstrate a diodepumped hdfa. We investigate the operation of holmiumdoped fibre amplifiers hdfas in the 2. For optimized tmdoped fibre with 3h4 level lifetime of 45. In this paper we show the analysis of thulium doped fibre amplifiertdfa gain dependence on pump laser wavelength and thulium doped fibre length. Fiber lasers quality products, customer part codes, flexible capacity production, consistency and service agility are just some attributes that make ofs the norisk choice for amplifier manufacturers. Fiber amplifiers are optical amplifiers with doped fibers as gain media. Thorlabs thuliumdoped tm fiber lasers are benchtop fabryperot fiber laser sources featuring single mode fiber output in the 2 m band and simple operation for test and measurement applications. The application of the model for predicting the sband amplifier performance and for optimization of amplifier parameters is shown.
The most important relaxation pathway is crossrelaxation to an intermediate state where stimulated emission can occur. Highpower fiber lasers emitting at the eyesafe wavelength of 2 m are fabricated from. Afs ultrafast fiber lasers are characterized by an outstanding performance combined with flexibility and maximum. Thuliumdoped fiber lasers operate in the region of wavelengths around 2 m and can be used as highpower laser sources. A thuliumdoped upconversion fiber laser with a threestep excitation scheme has been simulated with the rp fiber power software. Doped fiber amplifiers for other wavelength ranges. A comprehensive numerical model of a thuliumdoped silicabased fibre amplifiers is presented. In the second example, we will show how to model an approximately continuouswave cw interaction in a thulium doped material. The results of gain, noise figure, optical signaltonoise ratio osnr and output power.
High power qswitched thulium doped fibre laser using carbon. Therefore, it is crucial to study the effect of those events on the fiber amplifier devices. Thuliumdoped optical fiber amplification part 22 youtube. The 1550nm long pulse single frequency polarization maintaining fiber amplifiers of connet laser are designed for long pulse 200ns2us application. Thuliumdoped fiber amplifier development for power scaling. Thulium doped floridebased fiber amplifier how is thulium. The amplified spontaneous emission source in a backward direction with respect to the pump and in a singleended configuration produces.
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