Gain saturation characteristics of Raman amplification in silica and fluoride glass optical fibers

Mizunami, Toru; Iwashita, Hiroyuki; Takagi, Keiji

doi:10.1016/0030-4018(93)90620-k

Cited by 23 publications

(11 citation statements)

References 22 publications

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“…4. As in the earlier mentioned studies [40][41][42], we also find that the ZBLAN gain spectrum has a prominent and narrow gain band located at ν 1 17.4 THz Stokes shift and a broader gain band around ν 2 12.4 THz. In the copropagating pump-probe experiment, it is not possible to measure the gain spectrum for small Stokes shifts due to a strong background contribution from the pump.…”

Section: Raman Responsesupporting

confidence: 53%

Supercontinuum generation in ZBLAN fibers—detailed comparison between measurement and simulation

Agger¹,

Petersen²,

Dupont³

et al. 2012

J. Opt. Soc. Am. B

134

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We present a detailed comparison between modeling and experiments on supercontinuum (SC) generation in a commercial ZBLAN step-index fiber. Special emphasis is put on identifying accurate material parameters by incorporating measurements of the ZBLAN Raman gain, fiber dispersion, and loss. This identification of accurate parameters is of great importance to substantiate numerical simulations of SC generation in soft-glass fibers. Good agreement between measurement and simulation is obtained when pumping both in the normal and anomalous dispersion regimes.

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Section: Raman Responsesupporting

confidence: 53%

Supercontinuum generation in ZBLAN fibers—detailed comparison between measurement and simulation

Agger¹,

Petersen²,

Dupont³

et al. 2012

J. Opt. Soc. Am. B

134

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“…A variety of techniques has been used to study the Raman gain. This includes pump-probe techniques [12][13][14][15], studying the buildup of the Stokes beam for varying pump pulse length [16], and utilizing the amplification of sidebands through cross-phase modulation (XPM) [17]. Most of these techniques have been used to study either the gain in long fibers or in soft glass fibers with a high value of the Raman gain.…”

Section: Introductionmentioning

confidence: 99%

“…This value was obtained using a nanosecond pump at 580 nm [13]. The shape of the gain spectrum was not shown in that work, but spontaneous scattering spectra have been reported revealing a sharp peak around 600 cm −1 with a plateau extending toward lower values of the Stokes shift [18].…”

Section: Introductionmentioning

confidence: 99%

Stimulated Raman scattering in soft glass fluoride fibers

et al. 2011

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“…A bre Raman laser pumped by a doublefrequency Nd:YAG laser is a potential candidate for this purpose with the advantages of good beam quality, easy handling and long lifetime. Among the various types of Raman bre used today [4][5][6], GeO 2 -doped (germanosilicate or G-doped) and P 2 O 5 -doped (phosphosilicate or P-doped) silica bres attract most attention. GeO 2 -doped silica bres have a broad Raman gain spectrum with the peak at 440 cm 1 , the same as that for a pure silica bre.…”

Section: Introductionmentioning

confidence: 99%

Output characteristics of a fibre Raman laser with a composite GeO 2 and P 2 O 5 -doped silica fibre

Xu¹,

Prabhu²,

Li³

et al. 2001

Journal of Modern Optics

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A new type of bre Raman laser composed of a GeO 2 -and P 2 O 5 -doped silica bre was investigated experimentally and theoretically. The output of the laser displays two di erence characteristics depending on the type of bre being used as the input end. Using the P 2 O 5 -doped bre as the input end, the Raman Stokes line of 1320 cm 1 shift was enhanced by the latter GeO 2 -doped bre. While the GeO 2 -doped bre used as the input end, a wideband continuous spectrum was obtained. A model including e ects of bandwidth of the Raman gain, four-wave mixing and the mutual in uence of the GeO 2 -and P 2 O 5 -doped silica bre was constructed to illustrate the experimental observation. IntroductionStimulated Raman scattering (SRS) in optical bres has been researched intensively for over two decades [1][2][3]. The relevant applications cover many elds from optical communication, bre sensor to nonlinear spectroscopy. In the research of biophotonics and photodynamic diagnostics, tunable coherence sources operating around 600 nm are needed. The photon energy of this wavelength region is high enough to activate the photosensitizer e ciently and not too high to cause serious self-uorescence of tissue. A bre Raman laser pumped by a doublefrequency Nd:YAG laser is a potential candidate for this purpose with the advantages of good beam quality, easy handling and long lifetime. Among the various types of Raman bre used today [4-6], GeO 2 -doped (germanosilicate or G-doped) and P 2 O 5 -doped (phosphosilicate or P-doped) silica bres attract most attention. GeO 2 -doped silica bres have a broad Raman gain spectrum with the peak at 440 cm 1 , the same as that for a pure silica bre. The amplitude of Raman gain in the G-doped bre is proportional to the doping ratio and the Raman gain of pure GeO 2 is nine times that of pure SiO 2 material [7]. The Raman gain spectrum of P 2 O 5 -doped bres has two peaks at 440 and 1320 cm 1 which correspond to the vibrational band of SiO 2 and P 2 O 5 respectively [8]. It can be found that the third Raman order of GeO 2 coincide with the rst Raman order of P 2 O 5 . This coincidence, involving other nonlinear processes, such as four-wave mixing (FWM) [9], self-phase modulation (SPM) and cross-phase modulation (XPM) [10], will lead to a unique output of the composite P-and G-doped bre. In this paper, SRS for the composition of these two bres is investigated for the rst time

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Gain saturation characteristics of Raman amplification in silica and fluoride glass optical fibers

Cited by 23 publications

References 22 publications

Supercontinuum generation in ZBLAN fibers—detailed comparison between measurement and simulation

Supercontinuum generation in ZBLAN fibers—detailed comparison between measurement and simulation

Stimulated Raman scattering in soft glass fluoride fibers

Output characteristics of a fibre Raman laser with a composite GeO 2 and P 2 O 5 -doped silica fibre

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