Modeling and optimization of high-power Nd/sup 3+/-Yb/sup 3+/ codoped fiber lasers

Yahel, E.; Hess, Ortwin; Hardy, A.

doi:10.1109/jlt.2005.863324

Cited by 14 publications

(8 citation statements)

References 29 publications

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“…[24][25][26][27][28] The rate equations describe the relations among the excited states of all the ions. The equations in this model include the pumping power absorption by Er, Yb, and Nd ions, forward and backward energy transfers, ASE, and scattering losses.…”

Section: Theoretical Modelmentioning

confidence: 99%

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Neodymium, erbium, and ytterbium co-doped fiber amplifier

Ron

Hardy

2011

Opt. Eng

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A combination of erbium (Er), ytterbium (Yb), and neodymium (Nd), in fiber amplifiers, is examined. This combination extends the pumping wavelength spectrum by creating a new pumping path. Furthermore, the Nd addition enables pumping the amplifier from within the amplifier center, and thereby decreases the amplified spontaneous emission at the amplifier ends. A mathematical model is presented relating the excited population density, the signal power along the amplifier, the energy transfer among the ions, and the amplified spontaneous emissions. The study compares the amplifier characteristics of Er-Yb-Nd co-doped amplifier with a traditional Er-Yb amplifier for various combinations. The new configuration adds flexibility into the amplifier design. By properly selecting its parameters, one can increase the output signal power and decrease the amplified spontaneous emission, to comply with various requirements. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Section: Theoretical Modelmentioning

confidence: 99%

“…The Nd 4 F 5/2 state population is assumed to be zero due to the instantaneous decay to the 4 F 3/2 state. 24,31 The manifolds 4 I 15/2 , 4 I 13/2 , and 4 I 11/2 populations are assumed to be virtually empty, due to the fast nonradiative transition time of these levels.…”

Section: Theoretical Modelmentioning

confidence: 99%

Neodymium, erbium, and ytterbium co-doped fiber amplifier

Ron

Hardy

2011

Opt. Eng

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“…Apart from the donor-acceptor energy transfer and donor-donor energy migration, luminescence self-quenching through cross-relaxation mechanism among nearest neighbouring donor ions is an important factor in view of the sensitized luminescence [23].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Efficient non-resonant energy transfer in Nd^3+-Yb^3+ codoped Ba-Al-metaphosphate glasses

et al. 2010

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An efficient Nd 3+ → Yb 3+ energy transfer in a new series of alkali-free bariumalumino-metaphosphate glasses with a transfer efficiency reaching up to 95% has been reported here. It is due to the effective phonon assistance arising with the excellent matching of the present host phonon energy with the energy mismatch between Nd 3+ (4 F 3/2) and Yb 3+ (2 F 5/2) excited levels. The energy transfer microparameters for Nd 3+ → Yb 3+ forward and back energy transfer are estimated from the spectral data analysis. A parameter, Φ ET (= Yb Nd DA C − / Nd Nd DA C −) is proposed as a quantitative measure of sensitization ability per unit loss of the donor. The parameter is found to be highest for the presently reported barium-alumino-metaphosphate glasses.

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“…In modern active fibers technology addition of more than one rare earth elements is commonly used, co-doping allows for inclining the absorption efficiency of pump radiation, usage of pumping diodes with available emission bands to pump the addition of absorption band beyond the most efficient emission bands of semiconductor laser, inclining of the total efficiency of laser set-up and, in further perspective, reaching the possibility of usage one addition for pumping another one in one fiber [17][18][19][20][21]. It is not out of the significance that there is also a possibility of developing a generation of high power/energy radiation in the spectrum range between 1400 and 2200 nm.…”

Section: Re Ions Doped In the Active Fibersmentioning

confidence: 99%