Exact determination of scaling of the Raman gain efficiency in silica fibers

Cruz-May, L. de la; Mejía, E. B.; Benavides, Olena; Talavera, D. V.; Vásquez-Jiménez, J F

doi:10.1088/1054-660x/23/5/055103

Cited by 4 publications

(6 citation statements)

References 13 publications

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“…On the other hand, with the traditional relationship of Smith [9] the Raman gain efficiency is 3.36 W À1 km À1 at 1064 nm pump power, $25% larger than our result. On the other hand, using the equation of scaling of the Raman gain efficiency [16] for the SMF-28 fiber, we obtain g R ð1455 nmÞ ¼ 0:37 W À1 km À1 and g R ð1480 nmÞ ¼ 0:34 W À1 km À1 . Which are very close to g R ð1455 nmÞ ¼ 0:42 W À1 km À1 and g R ð1480 nmÞ ¼ 0:39 W À1 km À1 reported by [17].…”

Section: Resultsmentioning

confidence: 97%

“…The same experiments were made for various fibers with the results shown in Table 1. Attenuations , at 1064 nm, were measured with the cutback technique [16].…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, using the equation of scaling of the Raman gain efficiency [16] for the True Wave fiber, we obtain g R ð1116 nmÞ ¼ 1:8 W À1 km À1 . Which is approximate to the recently reported value g R ð1116 nmÞ ¼ 1:86 W À1 km À1 [15], i.e., there is a difference $4% between the two results.…”

Section: Resultsmentioning

confidence: 99%

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Novel Technique for Obtaining the Raman Gain Efficiency of Silica Fibers

et al. 2013

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We present a simple novel technique that determines with precision the Raman gain efficiency for telecom fibers. The method is supported by a mathematical relation, which is the solution for the coupled differential equations that govern the stimulated Raman scattering. This technique is valuable due to its simplicity and consists of measuring the residual pump and the Raman scattering signals at the stimulated Raman scattering threshold. Our technique was proven for different fibers; as a result, we found that the rate of pump power to stimulated Raman scattering at threshold is lower than $16, which is the historically used value.

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Section: Resultsmentioning

confidence: 97%

“…The same experiments were made for various fibers with the results shown in Table 1. Attenuations , at 1064 nm, were measured with the cutback technique [16].…”

Section: Resultsmentioning

confidence: 99%

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Novel Technique for Obtaining the Raman Gain Efficiency of Silica Fibers

et al. 2013

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“…) represent attenuation and gain coefficients, respectively (Tables 1 and 2) [10,15,16]. The forward and the backward propagations are denoted by + and -signs.…”

Section: Simulation Methodsmentioning

confidence: 99%

High-energy pulsed Raman fiber laser for biological tissue coagulation

Baac¹,

Uribe-Patarroyo²,

Bouma³

2014

Opt. Express

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Abstract:We demonstrate a high-energy pulsed Raman fiber laser (RFL) with an emission wavelength of 1.44 μm, corresponding to an absorption peak of water. Microsecond pulses with >20 mJ/pulse and >40 W peak power were generated, well above the threshold for tissue coagulation and ablation. Here, we focus on the optical characterization and optimization of high-energy and high-power RFLs excited by an ytterbium fiber laser, comparing three configurations that use different Raman gain fibers, but all of which were prepared with a one-side opened, free-run mode without output mirrors. We show that the free-run configuration can generate sufficiently high energy without requiring a closed cavity design. Experimental RFL characteristics corresponded well with numerical simulations. We discuss the Stokes beam generation process in our system and loss mechanisms mainly associated with fiber Bragg gratings.

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“…AsR eff is the effective mode related to the signal and Stokes waves, which is roughly equal to the cross-section area of the fiber core. The Raman gain coefficient g R is 0.98 × 10 −13 m W −1 [36]. In addition, it is assumed that the seed Raman power be proportional to the seed signal power with a typical coefficient of ~10 −4 , indicating that the Raman suppression of the seed signal light is 40 dB [37,38].…”

Section: Numerical Simulations and Analysismentioning

confidence: 99%

Investigation of stimulated Raman scattering in high-power co-pumping fiber amplifiers

Zheng¹,

Zhao²,

Zhao³

et al. 2018

Laser Phys.

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The stimulated Raman scattering (SRS) in a multi-kilowatt co-pumping fiber amplifier was investigated. Using 20 m of ytterbium-doped double-cladding fiber in the amplifier stage, an SRS product of 1032.9 nm could be clearly observed when the output laser power was more than 3360 W. By integrating the spectral curve, the ratios of laser power at 1080 nm and SRS to the total output power were 83.95% and 15.17% at the maximum power of 3699 W. In addition, the beam quality began to degenerate abruptly as the four-wave mixing and SRS components appeared. The M 2 factor was measured to be 3.06 at the maximal output power. The mode instability and nonlinear effects might be the main reason for beam quality degradation in high-power fiber amplifier systems.

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Exact determination of scaling of the Raman gain efficiency in silica fibers

Cited by 4 publications

References 13 publications

Novel Technique for Obtaining the Raman Gain Efficiency of Silica Fibers

Novel Technique for Obtaining the Raman Gain Efficiency of Silica Fibers

High-energy pulsed Raman fiber laser for biological tissue coagulation

Investigation of stimulated Raman scattering in high-power co-pumping fiber amplifiers

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