Design Solutions for Increased Thresholds of Non-Linear Processes in Silica Fiber

Baker, Colin; Dragic, Peter D.; Burdett, Ashley; Yu, Nanjie; Vargas, Amber L.; Friebele, E. J.; Rhonehouse, Daniel L.; Sanghera, Jasbinder S.

doi:10.1364/assl.2019.jw2a.9

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…For example, both P 2 O 5 and B 2 O 3 compositions have negative thermo-optic coefficients dn/dT. The combination of glasses with both negative (e.g., P 2 O 5 and B 2 O 3 ) and positive (e.g., Al 2 O 3 and SiO 2 ) contributions to thermo-optic coefficients can be an effective method to increase TMI threshold in silica fibers [323,324]. To realize this functional target, two sample fibers, with highly doped P 2 O 5 and B 2 O 3 and the background loss of less than 50 dB/ km, were fabricated to analyze the impact of lower thermooptic core compositions [37].…”

Section: Doping Components Engineeringmentioning

confidence: 99%

“…The normal methods for SBS suppression include enhancing core mode size and acoustically engineered fiber designs that generally require complicated core doping profiles or cladding structures [321]. Another practical solution is controlling the Brillouin gain through fiber designing because fibers with different index profiles have different Brillouin gain spectra and therefore different SBS thresholds [321][322][323][324][325][326][327][328][329]. The acousto-optic effective area has been introduced to predict the SBS threshold in optical fibers with ununiform index profiles [330].…”

Section: Doping Components Engineeringmentioning

confidence: 99%

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Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

et al. 2022

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The success of high-power fiber lasers is fueled by maturation of active and passive fibers, combined with the availability of high-power fiber-based components. In this contribution, we first overview the enormous potential of rare-earth doped fibers in spectral coverage and recent developments of key fiber-based components employed in high-power laser systems. Subsequently, the emerging functional active and passive fibers in recent years, which exhibit tremendous advantages in balancing or mitigating parasitic nonlinearities hindering high-power transmission, are outlined from the perspectives of geometric and material engineering. Finally, novel functional applications of conventional fiber-based components for nonlinear suppression or spatial mode selection, and correspondingly, the high-power progress of function fiber-based components in power handling are introduced, which suggest more flexible controllability on high-power laser operations. Graphical abstract

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Section: Doping Components Engineeringmentioning

confidence: 99%

Section: Doping Components Engineeringmentioning

confidence: 99%

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

et al. 2022

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On the Use of Brillouin Scattering to Evaluate Quantum Conversion Efficiency in Yb-doped Optical Fibers

Dragic

2021

J. Lightwave Technol.

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a method, based on Brillouin scattering, to evaluate the quantum conversion efficiency (QCE) in Yb-doped optical fibers is designed and tested. An adapted version of the heterodyne approach to measuring the Brillouin spectrum is first used to precisely quantify the temperature change of the fiber upon pumping. Next, a theoretical model based on the thermal conduction equation is constructed in order to simulate the temperature change assuming a QCE of one. Lastly, the QCE value of the fiber can be determined by comparing the experimental and simulation results. Importantly, the analysis can provide insight into the origin of thermal energy in a fiber. Serving in the proof-of-concept measurement, a commercial, lightly Ybdoped fiber is determined to have a QCE of 99.07%. Finally, this result is compared with slope efficiency measurements from a linear cavity laser using the same fiber as the active medium. Excellent agreement between the two measurements demonstrates the feasibility of the approach, with greater accuracy afforded by the Brillouin-based measurement. The proposed method is particularly useful for optical fiber optimization in high-power fiber laser and amplifier applications. It can also be valuable as a sensitive temperature probe in the study of anti-Stokes fluorescence cooling in optical fibers.

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Design Solutions for Increased Thresholds of Non-Linear Processes in Silica Fiber

Cited by 2 publications

References 4 publications

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

On the Use of Brillouin Scattering to Evaluate Quantum Conversion Efficiency in Yb-doped Optical Fibers

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