Active radiation hardening of Tm-doped silica fiber based on pump bleaching

Xing, Yingbin; Zhao, Nan; Liao, Lei; Wang, Yibo; Li, Haiqing; Peng, Jinggang; Yang, Lvyun; Dai, Nengli; Li, Jinyan

doi:10.1364/oe.23.024236

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…Besides, remarkable drop of the output power is observed with the increase of the radiation dosage. This phenomenon is consistent with the experiments reported for both Yb-doped fiber lasers and Tm-doped fiber lasers [34][35][36].…”

Section: Resultssupporting

confidence: 93%

“…For low power Er-doped and Er/Yb-codoped fiber amplifiers, experiments show that, without radiation-hardening or radiation-resistant treatment, a typical gain decrease over 50% at ∼100 Gy can be expected [32,33]. For moderate power Tm-doped fiber lasers, in 2015, Li reported the degradation of a 10 W level Tm-doped fiber laser with the Tm-doped fiber exposed to gamma radiation [34,35]. Experiments show that the output power and slope efficiency of the laser decrease monotonously with the accumulation of the radiation dose.…”

Section: Introductionmentioning

confidence: 99%

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Comparisons between high power fiber systems in the presence of radiation induced photodarkening

Tao¹,

Chen²,

Gao³

et al. 2022

Laser Phys.

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Performance of high power fiber lasers and amplifiers with different pump sources are evaluated in the presence of radiation induced photodarkening in post-irradiated active fibers. Evolutions of output power and thermal mode instability threshold under different radiation doses are examined and analyzed. Severe degradation in both output power and thermal mode instability threshold is recorded for high power fiber systems with their active fibers exposed to radiations. Comparisons show that, amplifiers present a relatively better performance than lasers in adverse environments. Besides, 976 nm pump source is more favorable for high power laser sources in radioactive applications, even though 915 nm pump ensures a much lower temperature profile inside the active fiber.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Comparisons between high power fiber systems in the presence of radiation induced photodarkening

Tao¹,

Chen²,

Gao³

et al. 2022

Laser Phys.

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“…More generally, absorption spectra measurements on Tm 3+ -doped silica (67,77) and fluoride (74,78) fibers and on Yb 3+ -doped silica fiber (43,75,79,80) showed that broad absorptions in the Vis regions correlate directly with the onset of PD. This finding implies that light-induced color centers in the silica and fluoride fibers underlie PD, with the overlapping of the induced absorption and Ln emission bands explaining the luminescence decay in photodarkened materials.…”

Section: Photodarkening and Color Centersmentioning

confidence: 98%

Photodarkening, Photobrightening, and the Role of Color Centers in Emerging Applications of Lanthanide-Based Upconverting Nanomaterials

Lee

Schuck

2023

Annu. Rev. Phys. Chem.

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Upconverting nanoparticles (UCNPs) compose a class of luminescent materials that utilize the unique wavelength-converting properties of lanthanide (Ln) ions for light-harvesting applications, photonics technologies, and biological imaging and sensing experiments. Recent advances in UCNP design have shed light on the properties of local color centers, both intrinsic and controllably induced, within these materials and their potential influence on UCNP photophysics. In this review, we describe fundamental studies of color centers in Ln-based materials, including research into their origins and their roles in observed photodarkening and photobrightening mechanisms. We place particular focus on the new functionalities that are enabled by harnessing the properties of color centers within Ln-doped nanocrystals, illustrated through applications in afterglow-based bioimaging, X-ray detection, all-inorganic nanocrystal photoswitching, and fully rewritable optical patterning and memory.

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“…As a consequence, most of the past studies were then devoted to RE-doped fiber characterization in order to identify the best fiber types to increase the tolerance of EDFA or EDFS first, and second to understand the basic mechanisms at the origin of the high radiation sensitivities of REDFs compared to telecom-grade passive optical fibers. Among the different types of RE-doped fibers, erbium (Er) and Er/ytterbium (Er/Yb)-doped fibers are the most studied [267][268][269][270][271], but other RE elements have also been considered in the past [92,272] or are today being investigated as promising technologies for future applications [273]. Characterizing the radiation response of REDFs appears to be more complex than the characterization of the transmission degradation of passive optical fibers.…”

Section: Rare-earth-doped Fibers Edfa and Edfsmentioning

confidence: 99%

Recent advances in radiation-hardened fiber-based technologies for space applications

Girard

Morana

Ladaci

et al. 2018

J. Opt.

199

108

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In this topical review, the recent progress on radiation-hardened fiber-based technologies is detailed, focusing on examples for space applications. In the first part of the review, we introduce the operational principles of the various fiber-based technologies considered for use in radiation environments: passive optical fibers for data links, diagnostics, active optical fibers for amplifiers and laser sources as well as the different classes of point and distributed fiber sensors: gyroscopes, Bragg gratings, Rayleigh, Raman or Brillouin-based distributed sensors. Second, we describe the state of the art regarding our knowledge of radiation effects on the performance of these devices, from the microscopic effects observed in the amorphous silica glass used to design fiber cores and cladding, to the macroscopic response of fiber-based devices and systems. Third, we present the recent advances regarding the hardening (improvement of the radiation tolerance) of these technologies acting on the material, device or system levels. From the review, the potential of fiber-based technologies for operation in radiation environments is demonstrated and the future challenges to be overcome in the coming years are presented.

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Active radiation hardening of Tm-doped silica fiber based on pump bleaching

Cited by 13 publications

References 22 publications

Comparisons between high power fiber systems in the presence of radiation induced photodarkening

Comparisons between high power fiber systems in the presence of radiation induced photodarkening

Photodarkening, Photobrightening, and the Role of Color Centers in Emerging Applications of Lanthanide-Based Upconverting Nanomaterials

Recent advances in radiation-hardened fiber-based technologies for space applications

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