Results 141 to 150 of about 3,107 (187)
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Frequency doubling in erbium-doped fibers
Optical Materials, 1994Abstract Erbium-doped fibers have been prepared for frequency doubling with various input powers. Annealing experiments were carried out, and a single exponential decay in time was found for the conversion efficiency. An activation energy of ~ 0.2 eV was measured for two fibers with different Er 3+ concentrations. A peculiar modal evolution was also
I.B. Couceiro +4 more
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Compact Brillouin/Erbium Fiber Laser Using Commercialized Erbium-doped Fibers
International Photonics and OptoElectronics Meetings, 2014We demonstrate a compact Brillouin/erbium fiber laser using commercialized erbium-doped fiber for both the nonlinear and linear gain. It presents single frequency, low phase noise (-124 dB/Hz1/2), and stable fast tuning.
Mo Chen +4 more
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Nonlinearities in Erbium Doped Fiber Amplifiers
Optical Amplifiers and their Applications, 1999In recent years, cross talk induced by the nonlinear properties of optical fibers has been recognized as an important limiting factor in the performance of wavelength division multiplexed (WDM) systems.
Mark Shtaif, Michael Eiselt
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Characterization of erbium doped fibers
2009In this thesis the theory of operation of single-mode erbium-doped fiber amplifiers pumped at 980 nm is described. Details of the derivation of the general rate equation for the propagation of signal, pump, and amplified spontaneous emission are provided. Based on this equation, and McCumber's theory of phonon-terminated optical masers, two closed form
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Multicore erbium doped fiber amplifiers
SPIE Proceedings, 2016ABSTRACT We review recent progress of multi -core erbium -doped fiber amplifiers (MC -EDFA). We confirmed by demonstrating a core -pumped MC -EDFA that MC -EDFs have practical amplification characteristic s and core -to-core crosstalk . Three types of cladding -pumped MC -EDFAs are also reviewed , one uses free space optics, other uses a fiber b undled
Koichi Maeda +3 more
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A Distributed Erbium Doped Fiber Amplifier
Optical Fiber Communication, 1990To date erbium amplifiers have been based on fiber doped with 10 to 1000 ppm erbium oxide, providing several tens of dB gain in lengths of 100 m or less.[1–4] However, communications systems which use such high gain, "lumped" amplifiers subject the signal to large excursions in amplitude, which can cause significant interchannel interference in a ...
J. R. Simpson +6 more
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Multifunctional Erbium Doped-Fiber Laser
Latin America Optics and Photonics Conference, 2010This work present a multifunctional Erbium doped fiber laser by the use of two arrayed waveguide gratings intracavity. The experimental setup allows simultaneous operation of three regimes: passive mode-locking, continuous wave and active mode ...
Cláudia B. Santos, Eunézio A. Souza
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2018
An erbium-doped fiber amplifier (EDFA) has five main optical components: an erbium-doped fiber, a laser diode (LD) to pump the fiber, a wavelength-dependent fiber coupler, a polarization-independent optical isolator, and an optical bandpass filter. The LDs operate at wavelengths which include 1.48, 0.98, and 0.82 μm.
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An erbium-doped fiber amplifier (EDFA) has five main optical components: an erbium-doped fiber, a laser diode (LD) to pump the fiber, a wavelength-dependent fiber coupler, a polarization-independent optical isolator, and an optical bandpass filter. The LDs operate at wavelengths which include 1.48, 0.98, and 0.82 μm.
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Erbium-doped phosphate fiber amplifiers
SPIE Proceedings, 2003In this paper, the development of phosphate glass fiber amplifier with a high gain per unit length is reviewed. The performance of compact multimode pumped erbium-doped phosphate fiber amplifiers is presented. A fiber amplifier with a small signal net gain of 41dB at 1535nm and 21dB over the full C-band was demonstrated using a newly developed 8-cm ...
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Progress in Erbium Doped Fiber Amplifiers
Optical Amplifiers and Their Applications, 1991Erbium fiber amplifiers are entering a fourth year of development with six commercial offerings now available, the result of rapid improvements in pump lasers, wavelength division multplexers, isolators and doped fiber designs. A number of challenges remain however to improve the performance and ensure reliability in field applications.
J.R. Simpson, D.J. DiGiovanni
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