I. OrdoFIBERAmplifiers
Sunt tria principalis genera optical Amplifiers:
(I) Semiconductor optical Amplifier (SoA, Semiconductor optical amplior);
(II) Optical fibra Amplifiers Doped cum rara terra elementa (Erbium er, Thulium TM, praseodymium pr, rubidium tm, etc), maxime Erbium-Doped Fiber Amplifiers (Edfa), Tum Thulium-Doped Fiber Amplifiers (TDFA) et Praseodymium-Doped Fiber Amplifiers (PDFA), etc.
(III) Nonlinear Fiber Amplifiers, Maxime Fiber Raman Amplifiers (Fra, Fibra Raman Amplifier). Pelagus perficientur collatio his optical Amplifiers est ostensum est in mensa
Edfa (Erbium Doped Fiber Amplifier)
A multi-gradu laser ratio potest formari per doping in quartz fibra cum rara terra elementa (ut tm, ER, PR, TM, etc.) et initus lumen est directe amplificari sub actione lumen. Postquam providente opportunitate feedback, a fibra laser formatur. In opus adsum ad ND-Doped Fiber Ampliffier est 1060NM et 1330nm et eius progressionem et applicationem limitata debitum ad deviationem ex optimis descendat portum de fibra opticum et alia causa. Et operating wavelengths of Edfa et PDFA sunt respective in fenestra de lowest damnum (1550nm) et nulla dispersionem unam (1300nm) et optical fibra communication, et tdfa operatur in S-Cohors System, quod Optica Fiber Communication System. Praesertim edfa, maxime celeri progressionem, iam practicus.
InPRinciple Edfa
In basic structuram de Edfa est ostensum est in Figura I (a), quod est maxime composito ex activae medium (Erbium-Doped Silica fibra de decem metris longa, cum Core Diameter 3-5 Microns et Doping LD), Source (CMXC et Core (CML (CMXC et Sententias Link. Signum lux et laoreet lumen potest propagare in eodem (Codirectional elit) opposita (vicissim elit) vel utraque (bidirectional elit) in Erbium fibra. When the signal light and the pump light are injected into the erbium fiber at the same time, the erbium ions are excited to a high energy level under the action of the pump light (Figure 1 (b), a three-level system), and quickly decay to the metastable energy level , when it returns to the ground state under the action of the incident signal light, it emits photons corresponding to the signal light, so that the signal is amplified. Figura I (c) est eius ampliatum spontanea emissionem (ASE) spectro cum magna Sed (usque ad 20-80nm) et duo iuga correspondentes 1530nm et 1550nm respectively.
Pelagus commoda Edfa sunt altum quaestum, magna Sed, excelsum output potestatem excelsum sentinam efficientiam humilis insertionem damnum et insensitivity ad Polarization statu.
II. Difficultates Fiber optical Amplifiers
Licet in optical amplior (praesertim edfa) habet multa praestantes commoda, non est idealis amplior. Praeter additional strepitu, quod reduces in Signum, sunt alia defectus, ut:
- inaequalitatem de lucratione spectro in amplifier Sed afficit multi-channel amplificationem perficientur;
- Cum optical amplifiers sunt cascaded, effectis Ase strepitu, fibra dispersionem et nonlinear effectus erit accumula.
Hae exitibus debet considerari in applicationem et ratio consilio.
III. Applicationem optical amplii in optical fibra communicationis ratio
In optical fibra communicationis ratio,Fibra optical amplican be used not only as a power boost amplifier of the transmitter to increase the transmission power, but also as a preamplifier of the receiver to improve the receiving sensitivity, and can also replace the traditional optical-electrical-optical repeater, to extend the transmission distance and realize all-optical communication.
Optical fibra communicationis systems, principalis factores limitando tradenda distantia damnum et dispersionem optical fibra. Using a angusto, spectro lux fons, aut opus prope in nulla dispersio fluvelength, quod influentia fibra dispersionem est parvum. Hoc ratio non opus praestare completum signum leo regeneratione (3r Nullam) ad invicem Nullam statione. Satis est ad directe amplificare optical signum cum optical amplior (1r Relay). Optical Amplifiers potest esse non solum in longa distantia trunco systems sed etiam in optical fibra distribution retiacula, praesertim in WDM systems, ad amplificare multiple channels eodem.
I) Application of optical Amplifiers in trunco optical fibra communicationis systems
Fig. II est a schematic diagram de application of optical amplior in trunco optical fibra communicationis ratio. (A) in picture ostendit quod optical amplior est usus ut potentia boost amplii transmitter et preamplifier de recipiente ut non-Nullam distantiam duplicatum. Eg adoptans Edfa, ratio tradenda Distantibus 1.8GB / s 120km crescit a 120km ad 250km vel etiam usque ad 400km. Figura II (b) - (d) est applicationem optical amplifiers in multi-Nullam Systems; Figura (b) est traditum 3r Nullam modus; Figura (C) est mixta Nullam modus 3R repeaters et optical amplifiers; Figura II (D) Est omnibus, optical Nullam modus; In omnibus, optical communicationis ratio, non includit leo et regeneratione circuit, ita quod aliquantulus-perlucidum, et non est "electronic utrem whisker" restrictione. Quamdiu mittens et accepto apparatu utrinque reponitur, facile upgrade ex humili rate ad altum rate et optical amplior non oportet reponi.
II) Application of Optical Amplifier in Optical Fiber Distribution Network
In princeps potentia output commoda optical amplifiers (praesertim edfa) sunt valde utilis in broadband distribution networks (utCATVNetworks). Traditional catv network adoptat coaxial funem, quod oportet ampliari omnis plures centum metris et servitium radius network de 7km. Optical fibra catv network usura optical amplifiers non solum multum auget numerum distribui users, sed etiam valde expand in network semita. Recent developments ostensum est quod distributio optical fibra / Hybrid (HFC) trahit vires utriusque et fortis aemulationes.
Figura IV est exemplum est in optical fibra distribution network ad AM VSB Modulation De XXXV channels de TV. Et lux fons transmitter est DFB-LD cum intus 1550nm et output potestatem 3.3dbm. Using IV-Level Edfa ut potentia distribution ampli, eius initus potentia est de -6dbm, et output potestatem de 13dbm. Optical recipiens sensum -9.2d BM. Post IV gradus distribution, in summa numerus of users habet pervenit 4.2 decies, et network semita plus quam decem kilometers. Et ponderati signa-ut-sonitus ratio in test maius 45db et EDFA non faciam reductionem in CSO.
Post tempus: Apr-23-2023