A high gain, high output saturation power Pr/sup 3+/-doped fluoride fiber amplifier operating at 1.3 mu m

Ohishi, Yasutake; Kanamori, T.; Nishi, Toshihiro; Takahashi, Shiro

doi:10.1109/68.84462

Cited by 80 publications

(20 citation statements)

References 6 publications

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“…Accordingly, to obtain the true fiber gain the experimental values reported must be reduced by = 6 dB, bringing them into agreement with the calculation. We also simulated the experimental results reported by Ohishi et al [4]. The inset in Fig.…”

supporting

confidence: 47%

“…have been achieved, but the low quantum efficiency of the 'G4 upper level in the gain transition leads to very high pump power requirements [4], [5]. Although experiments have revealed the importance of waveguide parameters in reducing the required pump power, until now there has not been a systematic analysis of the performance improvements that can be achieved through fiber design or the use of host glasses providing a longer lifetime for the metastable state.…”

mentioning

confidence: 99%

“…Of this = 0.75 dB/m loss, 0.6 -0.7 dB/m corresponds to GSA from the Pr3+ 3H4 -+ 3F4 transition, consistent with our calculated value of 0.7 dB/m at 1310 nm. As was pointed out by Ohishi et al [4], this GSA should not be added to the observed gain to determine the fiber gain since it represents loss due to unexcited ions which is bleached in a highly excited amplifier. Accordingly, to obtain the true fiber gain the experimental values reported must be reduced by = 6 dB, bringing them into agreement with the calculation.…”

mentioning

confidence: 99%

“…3 displays gain versus signal wavelength for 925 mW of pump power at 1017 nm. Here the fiber is doped with 500 ppm-wt Pr3+, has a cutoff wavelength of 650 nm, an NA of 0.16, and a length of 23 m [4]. The crosses are the experimental results [4], and the solid curve is the calculations.…”

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confidence: 99%

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Optimization of Pr/sup 3+/:ZBLAN fiber amplifiers

Pedersen

Miniscalco²,

Quimby

1992

IEEE Photon. Technol. Lett.

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supporting

confidence: 47%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Optimization of Pr/sup 3+/:ZBLAN fiber amplifiers

Pedersen

Miniscalco²,

Quimby

1992

IEEE Photon. Technol. Lett.

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“…Such strong MPR has been the major problem associated with practicality of the 1.3-m emission of Dy 3+ , despite possessing some superior characteristics to the 1 G 4 → 3 H 5 transition of Pr 3+ which is utilized in commercial fluoride optical fiber devices. 13 The measured lifetime of the 1.3-m emission in some representative sulfide glasses is only ϳ35 s indicating the quantum efficiency is quite low. 14,15 To reduce the MPR low-phonon-energy hosts are often considered.…”

Section: Introductionmentioning

confidence: 99%

Controlling fluorescence lifetime of rare-earth element in amorphous inorganic solids via very small compositional adjustments

Choi

Curry

Park

et al. 2005

Journal of Applied Physics

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Fluorescence lifetime of hypersensitive 4f-4f transitions of rare-earth elements embedded in amorphous inorganic solids can be dramatically modified by compositional adjustment of the hosts tantamount to not more than 1 mol % without any elaborated thermal treatments. It is possible to modify a spontaneous emission rate of Dy 3+ : ͑ 6 F 11/2 , 6 H 9/2 ͒ → 6 H 15/2 transition in chalcogenide GeAs-S glasses through selective addition of low levels of Ga and CsBr. Along with the change of the spontaneous emission rate, multiphonon relaxation rate involved in the ͑ 6 F 11/2 , 6 H 9/2 ͒ state also significantly varies upon the minute compositional adjustment. The combination of these effects results in the measured lifetime of the fluorescing ͑ 6 F 11/2 , 6 H 9/2 ͒ level being greatly enhanced. Such behaviors are attributed to the hypersensitive nature associated with the 6 H 15/2 ↔ 6 F 11/2 transition and preferential coordination of bromine in the nearest-neighboring shell of the Dy 3+ ions, which is formed spontaneously during the vitrification process of the host materials. These experimental observations show the most extreme dependence of the fluorescence lifetime on small compositional changes reported compared to any other noncrystalline solid-state dielectric. As such coutilization of many hypersensitive transitions of rare-earth elements and those host materials used in this study may present a unique opportunity to control absorption and emission properties, especially fluorescence lifetimes, through a minute compositional adjustment.

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Fibers for Optical Communications

Takahashi

1993

Advanced Materials

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Low‐loss optical fibers based on silica now have a transmission loss value approaching the theoretical limit, and thus attention has turned to other materials. Fibers for optical communications are reviewed in general, and the methods of loss reduction in silica‐based fibers are discussed. Advanced materials and new processing technologies are described for active fibers, in which the light is intentionally modified as it propagates along the fiber, as well as for ultra‐low‐loss passive fibers.

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A high gain, high output saturation power Pr/sup 3+/-doped fluoride fiber amplifier operating at 1.3 mu m

Cited by 80 publications

References 6 publications

Optimization of Pr/sup 3+/:ZBLAN fiber amplifiers

Optimization of Pr/sup 3+/:ZBLAN fiber amplifiers

Controlling fluorescence lifetime of rare-earth element in amorphous inorganic solids via very small compositional adjustments

Fibers for Optical Communications

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