Rayleigh scattering reduction method for silica-based optical fiber

Tsujikawa, Kyozo; Tajima, Kazuo; Ohashi, M.

doi:10.1109/50.896213

Cited by 49 publications

(30 citation statements)

References 16 publications

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“…They are expressed as [GeO 2 ], [P 2 O 5 ], and [F], respectively. Figure 2 shows the relationship between the dopant concentration and Rayleigh scattering coefficient for two types of sample with different thermal histories [8,9]. In Fig.…”

Section: Rayleigh Scattering Of Vad Preformsmentioning

confidence: 99%

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Intrinsic loss of optical fibers

Tsujikawa

Tajima

Zhou

2005

Optical Fiber Technology

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Section: Rayleigh Scattering Of Vad Preformsmentioning

confidence: 99%

“…In particular, we show the dependence of Rayleigh scattering on dopant concentration and fictive temperature, which enables us to reevaluate their intrinsic losses [6][7][8][9][10][11]. We define the intrinsic loss of each fiber as a practical target value for loss reduction, which is obtained from the Rayleigh scattering of preforms.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic loss of optical fibers

Tsujikawa

Tajima

Zhou

2005

Optical Fiber Technology

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“…The parameters of each equation were determined by applying Eqs. (4) to (8) to the measurement data in the wavelength range from 2.2 to 4.35 µm and fitting by using nonlinear regression [30].…”

Section: Absorption Properties Of the Oh Group In Multicomponent Oxidmentioning

confidence: 99%

“…An extremely low loss of 0.154 dB/km was achieved at the 1.56-µm wavelength [2]. Various reduction methods have been proposed for the Rayleigh scattering losses [3][4][5][6][7][8] and the structural imperfection losses [9][10][11] which cause the losses in the glass fibers. By combining these methods, further advances in these loss reduction techniques are expected.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of multicomponent oxide glasses and glass fibers

Tsujikawa

Ohashi

Tajima

2003

Electron. Comm. Jpn. Pt. I

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SUMMARYWe experimentally studied the optical properties of multicomponent oxide glasses that contain metallic components, such as potassium and sodium, and their glass fibers. The Rayleigh scattering coefficients of glasses such as Na 2 O-B 2 O 3 -SiO 2 (NBS), K 2 O-MgO-SiO 2 (KMS), K 2 ONa 2 O-MgO-SiO 2 (KNMS) are smaller than that of pure quartz glass. In particular, the Rayleigh scattering coefficient of KNMS glass was significantly lower at 38% of the value for pure quartz glass. This is believed to be the result of suppressing the composition fluctuations of KNMS glass by the mixed alkali effect. Furthermore, we studied the absorption properties of OH group impurities included in multicomponent oxide glasses. In particular, we fabricated NAS glass fibers that substituted the OH group impurity with an OD group (deuterium) by the double crucible method and verified a loss reduction of about 800 dB/km at the 1.55-µm wavelength. Through these studies, we clearly showed that the absorption losses of the OH group that hydrogen bonds to nonbridging oxygen clearly affected the increase in the 1.55-µm band loss in multicomponent oxide glass fibers.

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“…It is both a fundamental subject related to the nature of the glass transition but also an active field in applied sciences for example for telecommunication fibers transmission improvement [1].…”

Section: Introductionmentioning

confidence: 99%