Results 181 to 190 of about 25,004 (226)
Some of the next articles are maybe not open access.
Loop Erbium-Doped Fiber Amplifiers
Fiber and Integrated Optics, 2000A comprehensive study of implementing erbium-doped fiber amplifiers (EDFAs) using a loop configuration is presented. Two different schemes based on the mechanism of directing the loop output are investigated. The amplified spontaneous emission at the output port is 3 dB lower than conventional designs.
openaire +1 more source
Intensity based erbium distribution for erbium doped fiber amplifiers
Optical and Quantum Electronics, 2007A method to calculate an optimum Erbium distribution to enhance the gain efficiency in EDFA is proposed. This method calculates Erbium distribution based on optical pump envelop, pump power and optical properties of Erbium ion. The intensity-based Erbium distribution is obtained for single-mode fiber and dispersion-shifted fiber types EDFA for pump ...
Alireza Hassani +2 more
openaire +2 more sources
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.
openaire +1 more source
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.
openaire +1 more source
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
openaire +1 more source
Erbium-doped Mid-Infrared Fiber Lasers
Conference on Lasers and Electro-Optics, 2016The performance of mid-infrared fiber lasers based on erbium has improved dramatically during the last few years. In this paper we will discuss the progress of a fiber laser that can operate on both the 3.5 μm transition and/or the more common 2.8 μm transition in erbium.
Ori Henderson-Sapir +5 more
openaire +1 more source
Q-Switched Erbium-Doped Fiber Lasers
2006 International Students and Young Scientists Workshop - Photonics and Microsystems, 2006A few configurations of Q-switched erbium-doped fiber lasers (QEFLs) were investigated. Two kinds of Q-switching elements - acousto-optic and electro-optic were used. We show the advantage of A-O technique with frequency shifting over the electro-optical one.
Natalia Trela, Pawel R. Kaczmarek
openaire +1 more source
Bistability of erbium-doped fiber laser
Optics Communications, 1998In this paper, we report a study of the dynamic response of an erbium-doped fiber ring laser. When the pump light is sinusoidally modulated with small modulation index, the lasing light displays a resonant peak at a particular modulation frequency. However, as the modulation index was increased, two regions of bistability were observed. Furthermore, by
Liguo Luo, T.J. Tee, P.L. Chu
openaire +1 more source
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
openaire +1 more source
Erbium-doped photonic crystal fiber laser
SPIE Proceedings, 20091 Shenzhen Key Laboratory of Laser Engineering, College of Electronic Science and Technolog, Shenzhen University, Shenzhen, Guangdong 518060, P.R.China 2 College of Physical Science and Technology, Shenzhen University, Guangdong 518060, P.R.China Abstract We have demonstrated a low threshold all fiber laser based on a 9.68 m-long small core Erbium ...
Haili Yang +3 more
openaire +1 more source
A global design of an erbium-doped fiber and an erbium-doped fiber amplifier
Optics & Laser Technology, 2004Abstract A global design of an erbium-doped fiber and an open-loop erbium-doped fiber amplifier (EDFA) in a steady-state operation is discussed by applying genetic algorithms. Taking a signal gain and a bandwidth as objective functions, 7 parameters of the EDFA (erbium concentration, core radius, erbium-doped radius, refractive index difference ...
openaire +1 more source