A novel method for simultaneous measurement of doped optical fiber parameters

Karimi, Mohammad Sharif; Seraji, Faramarz E.

doi:10.1051/epjap/2010038

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…So, in the conventional cut-back method, the absorption cross-section must be evaluated by the direct method 25 . Double or triple cut back can also characterize the main doped fiber parameters simultaneously using pseudoparameters 26 , 27 . Another technique is the twice perpendicular measurement method with strict time management 24 .…”

Section: Background Of Heat Source In Flsmentioning

confidence: 99%

“…25 Double or triple cut back can also characterize the main doped fiber parameters simultaneously using pseudoparameters. 26,27 Another technique is the twice perpendicular measurement method with strict time management. 24 From any mentioned techniques, the background loss must be determined in the pump and signal (laser) wavelength separately.…”

Section: Attenuation (Background Loss)mentioning

confidence: 99%

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Contribution of different factors in heat production in Yb3+-doped fiber laser: a review

Karimi

2022

Opt. Eng.

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The three important factors that affect the output power and temperature of fiber lasers (FLs) were investigated in a large mode area step-index FL under a high-power operation. Photodarkening (PD), quantum defect (QD), and background loss cause increases in the FLs temperature and reductions in beam quality, stability, and power. PD and background loss coefficients have different values for the signal (laser) or pump wavelength. But QD depends on the difference between the pump and the laser wavelength. By considering the PD attenuation in the rate equations, the effects of forward, backward, and bidirectional pump schemes on heat distribution agents were investigated. FL characters, including core and clad sizes, both side reflectors, and FL lengths in each heat generation agent, were studied in detail.

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Section: Background Of Heat Source In Flsmentioning

confidence: 99%

Section: Attenuation (Background Loss)mentioning

confidence: 99%

Contribution of different factors in heat production in Yb3+-doped fiber laser: a review

Karimi

2022

Opt. Eng.

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“…Recently, we have reported experimental techniques for simultaneous measurement of the σ a , σ e and α in lossy DOFs [18][19][20] and low-loss (< 10 dB/km) EDOF [21]. In the present paper, with an aim of theoretical comparative studies of our proposed technique and the CCM, we will utilize the same method but with a different approach to evaluate simultaneously the σ a , σ e and dopant concentration in lowloss EDOFs, which is based on variant input power, hence the name variant input single cutback method (VISCM).…”

Section: Introductionmentioning

confidence: 99%

Theoretical Comparative Studies of Cross-Section Evaluation in Erbium-Doped Optical Fibers

Karimi¹,

Seraji

2010

PIER B

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Abstract-In this paper, we introduce a different approach of previously reported method to determine absorption and emission cross-sections (σ a and σ e ), and dopant concentration in Erbium doped optical fibers (EDOFs) with low background loss (α). We call this new method as variant input single cutback method (VISCM). There is technical similarity between VISCM and conventional cutback method (CCM) for determination of cross-sections, but in former pump and signal powers are not used together. We numerically verify the effect of different parameters such as input power, background loss, and EDOF amplifier cutback length on the cross-sections using VISCM and CCM. We also present the simulation results of maximum gain and optimum length using obtained cross-sections by two methods. We show that the VISCM presents more accuracy than that of CCM in any conditions. In the presence of α, both CCM and VISCM give not actual but pseudo values for the σ a and σ e . Using pseudo parameters values obtained by VISCM for α < 10 dB/km, the error of maximum gain and optimum length of designed EDOF is shown negligible.

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A Novel Measurement Technique of the Parameters of Erbium-Doped Optical Fibers

Bylina¹,

Чаймарданов²

2019

PTU

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Аннотация: В статье выявлены основные недостатки существующих методик измерения параметров активных оптических волокон (АОВ) для модели, используемой для DWDM-систем. Показано, что результат моделирования мощности сигнала вдоль АОВ может существенно зависеть от точности определения коэффициентов поглощения и усиления АОВ. Представлен разработанный комплекс новых методик для определения параметров АОВ, произведена его экспериментальная проверка, выявлены его ограничения и области применения.

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A novel method for simultaneous measurement of doped optical fiber parameters

Cited by 3 publications

References 19 publications

Contribution of different factors in heat production in Yb3+-doped fiber laser: a review

Contribution of different factors in heat production in Yb3+-doped fiber laser: a review

Theoretical Comparative Studies of Cross-Section Evaluation in Erbium-Doped Optical Fibers

A Novel Measurement Technique of the Parameters of Erbium-Doped Optical Fibers

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