Influences of Thermal Annealing Temperatures on Irradiation Induced $E^{\prime}$ Centers in Silica Glass

Wang, Tingyun; Xiao, Zhongyin; Luo, Wenyun

doi:10.1109/tns.2008.2003439

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…Table 1 shows the percentage of radiation-induced-loss reduction in the radiated SMF samples after photo-bleaching treatment. The photo-bleaching experiment implies that high LASER power can bleach the defects in pre-irradiation fiber which can be explained as follows [6][7][8][9] (Take SiE' Center and GEC for example, and if we substitute Si E' center for Ge E'…”

Section: Resultsmentioning

confidence: 99%

“…However, the rehabilitating rate is limited; what's more, the process usually takes very long time. In order to improve optical transparency and reduce radiation-induced loss in irradiated fiber more efficiently, Thermal-Bleaching method [9][10] and photo-bleaching method [11][12][13][14] are both introduced. Although the thermal-bleaching technique is widely used in glass and photo-bleaching technique is reported in many papers, photo-bleaching technique applied in SMF has not been lucubrated.…”

Section: Introductionmentioning

confidence: 99%

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Influence of photo- and thermal bleaching on pre-irradiation low water peak single mode fibers

et al. 2011

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Reducing the radiation-induced transmission loss in low water peak single mode fiber (LWP SMF) has been investigated by using photo-bleaching method with 980nm pump light source and using thermal-bleaching method with temperature control system. The results show that the radiation-induced loss of pre-irradiation optical fiber can be reduced effectively with the help of photo-bleaching or thermal-bleaching. Although the effort of photo-bleaching is not as significant as thermal-bleaching, by using photo-bleaching method, the loss of fiber caused by radiation-induced defects can be reduced best up to 49% at 1310nm and 28% at 1550nm in low pre-irradiation condition, the coating of the fiber are not destroyed, and the rehabilitating time is just several hours, while self-annealing usually costs months' time. What's more, the typical high power LASER for photo-bleaching can be 980nm pump Laser Diode, which is very accessible.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of photo- and thermal bleaching on pre-irradiation low water peak single mode fibers

et al. 2011

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“…The most detailed information on defect structures in silica glass has been reviewed by Warren et al [12]. The influences of thermal annealing on irradiation induced E' centers in silica glassalso has been studied in [13].…”

Section: Methodsmentioning

confidence: 99%

Annealing Effects on Silica Based Optical Waveguides Fabricated by Electron Beam Irradiation

Syahriar¹

2014

SST

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<strong>Defect in channel waveguide fabricated by e-beam irradiation of PECVD silica-on-silicon films are analyzed by characterizing the propagation constant change due to high temperature annealing. The changes of normalized compaction are also described and the theoretical prediction on the variation of normalized compaction with anneal temperature in isochronal annealing is also provided.</strong>

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“…The signal labeled corresponds to the nonbridging oxygen hole center (NBOHC), characterized by g values: [2], [23]. The SiE' and NBOHC in the fiber material are mainly from the Si-O-Si bond breakage [2], [15], [24], [25] while the Ge-O-Si bond breaking produces the GeE' and NBOHCs [2]. The Germanium electron center (GEC) are also detected:…”

Section: A Irradiation Processmentioning

confidence: 99%

Influence of Irradiation and Annealing on Structural Properties of the Optical Fiber Cladding Material

Wang

Yin

Xiao

et al. 2012

IEEE Trans. Nucl. Sci.

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We experimentally investigate the influences of irradiation and annealing process on the microstructure properties of optical fiber cladding material. The electron spin resonance (ESR) results reveal that the defect concentration significantly decreases after silica fiber cladding material is irradiated by ã-rays with a successive thermal annealing process. Raman analysis show the irradiated microstructure of cladding material change little, after irradiation, which indicates that the three-and four-membered rings (3-MRs and 4-MRs) structures are stable. However, after thermal annealing process, Raman spectrum shows that 3-MRs and 4-MRs are reduced obviously, which means that the ring structures are broken after thermal annealing and new stable structures are formed. X-ray diffraction (XRD) also shows that slight crystallization occurs when the annealing temperature is equal to . We conclude that Si-O bonds around 3-MRs and 4-MRs are easier to fracture, where color centers are formed. We also show the microstructure models explained by the theory of quantum chemistry.

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Influences of Thermal Annealing Temperatures on Irradiation Induced $E^{\prime}$ Centers in Silica Glass

Cited by 17 publications

References 18 publications

Influence of photo- and thermal bleaching on pre-irradiation low water peak single mode fibers

Influence of photo- and thermal bleaching on pre-irradiation low water peak single mode fibers

Annealing Effects on Silica Based Optical Waveguides Fabricated by Electron Beam Irradiation

Influence of Irradiation and Annealing on Structural Properties of the Optical Fiber Cladding Material

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