Reversible optical bleaching of the induced absorption in fiber-optic waveguides

Dianov, Evgenii M; Kornienko, L. S.; Nikitin, E P; Рыбалтовский, А. О.; Chernov, P. V.

doi:10.1070/qe1979v009n05abeh009063

Cited by 19 publications

(5 citation statements)

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“…LTIRA intensity decreases monotonically with the increase of the annealing temperature and it is nearly to zero at RT . Another source of losses in PSC optical fibers has been identified and is related to chlorine‐related impurity species such as Cl 2 or Cl 0 …”

Section: Introductionmentioning

confidence: 99%

Pulsed X‐Ray Radiation Responses of Solarization‐Resistant Optical Fibers

Michele

Marcandella

Francesca

et al. 2018

Physica Status Solidi (a)

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The transient radiation‐induced attenuation (RIA) of two different versions of pure‐silica‐core (PSC) multimode optical fibers (so‐called “solarization‐resistant” fibers) exposed to nanosecond 1 MeV X‐ray pulses are investigated. On‐line RIA spectra measurements at both room temperature (RT) and liquid nitrogen temperatures (LNT) in the range 1–3.5 eV are performed. Following the RIA kinetics, the properties of the metastable defects that are bleached just after the pulse are discussed. The spectral decomposition of the RIA is performed using known Gaussian bands associated to point defects absorbing in this spectral range. For both fiber types, the generation and the post‐irradiation kinetics of the self‐trapped holes (STHs) that are the main contributor to the transient RIA are investigated particularly. Moreover, thanks to the measurements performed at low temperatures the complex temperature dependence of the kinetics of self‐trapped holes and some chlorine‐related species is characterized.

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Section: Introductionmentioning

confidence: 99%

Pulsed X‐Ray Radiation Responses of Solarization‐Resistant Optical Fibers

Michele

Marcandella

Francesca

et al. 2018

Physica Status Solidi (a)

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“…Er-doped fiber exposed to gamma-ray irradiation from 0.1 to 10 kGy for 18 h can be bleached by 980 nm light [21]. Silica core fiber under a 30 Gy dose of gamma-ray radiation at 15 Gy/h can be bleached by 623.8 nm laser [22]. Up to now, much effort has been put into the radiation efforts and resistance of Yb-, Er-, and Yb/Er-doped fiber; however, few researchers have focused on TDF under gamma-ray irradiation, which is used for the military and space exploration.…”

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confidence: 99%

Pump bleaching of Tm-doped fiber with 793 nm pump source

et al. 2015

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We demonstrate, for the first time to our knowledge, the strong recovery of the optical-optical slope efficiency of gamma-ray-irradiated Tm-doped fiber under 793 nm laser diode (LD) pumping. The fiber optical-optical slope efficiency, the fiber cladding absorption spectra, and the fluorescence spectra of the Tm-doped fiber before and after 500 Gy gamma-ray irradiation have been measured for comparison. It is found that the fiber optical-optical slope efficiency had significant degradation from 56.3% to 26.7% after irradiation and recovered to 40.8% after 15 h pump bleaching. Based on comparative analysis of fiber cladding absorption spectra among pristine fiber, irradiation, and bleaching, the reasons for the strong recovery have also been discussed.

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“…The photobleaching light might be the measuring signal itself or it can be a secondary beam of light propagating down the same fiber. The phenomenon of photobleaching was known already in the 80s 18,19 and some work has been devoted to investigating it, 13,20,21 but very little at the cryogenic temperatures which we are interested in for superconductor quench protection. 22,23 Furthermore, since the phenomenon of photobleaching is intimately related to radiation-induced attenuation.…”

Section: Introductionmentioning

confidence: 99%

“…22,23 Furthermore, since the phenomenon of photobleaching is intimately related to radiation-induced attenuation. Any factors that affect RIA, will also have an impact on photobleaching, like temperature, [16][17][18] wavelength 24, 25 or power. 5,26 This last factor is the one we are most interested in, as we want to find out whether the effectiveness of the photobleaching light is proportional to its optical power or there is a more complex relationship between the two.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of radiation-induced attenuation of optical fibers through photobleaching: study of power dependence at cryogenic temperatures

Solis Fernandez,

Ludbrook,

Schuyt

et al. 2024

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024

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Radiation-induced attenuation can pose a great challenge to the implementation of optical sensors in extreme environments. Photobleaching is known to mitigate the damage caused by radiation but a lot is yet to be investigated. In this work, we look at the power-dependence of the photobleaching phenomenon at cryogenic temperature. We used three standard fibers carrying around 2mW of light at 1550nm and 4, 0.4, 0.09 of the light at 1050nm respectively; and a fourth standard control fiber that carried no photobleaching light. We observed a large reduction in radiation-induced attenuation in all of the fibers with light at 1050nm when compared to the control fiber. This reduction, however is not linear and saturates for higher powers. These results are consistent with our theoretical models.

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Reversible optical bleaching of the induced absorption in fiber-optic waveguides

Cited by 19 publications

References 0 publications

Pulsed X‐Ray Radiation Responses of Solarization‐Resistant Optical Fibers

Pulsed X‐Ray Radiation Responses of Solarization‐Resistant Optical Fibers

Pump bleaching of Tm-doped fiber with 793 nm pump source

Mitigation of radiation-induced attenuation of optical fibers through photobleaching: study of power dependence at cryogenic temperatures

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