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Title: Observation of temperature dependence of the IR hydroxyl absorption bands in silica optical fiber

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
Sponsoring Org.:
USDOE
OSTI Identifier:
1366439
Report Number(s):
UNIV-PUB-372
Journal ID: ISSN 1068-5200; PII: S1068520016000158
DOE Contract Number:
DE-FE0004000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Optical Fiber Technology; Journal Volume: 30; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Fused silica; Glass; Fiber optics; Hydroxyl absorption band

Citation Formats

Yu, Li, Bonnell, Elizabeth, Homa, Daniel, Pickrell, Gary, Wang, Anbo, Ohodnicki, P. R., Woodruff, Steven, Chorpening, Benjamin, and Buric, Michael. Observation of temperature dependence of the IR hydroxyl absorption bands in silica optical fiber. United States: N. p., 2016. Web. doi:10.1016/j.yofte.2016.01.004.
Yu, Li, Bonnell, Elizabeth, Homa, Daniel, Pickrell, Gary, Wang, Anbo, Ohodnicki, P. R., Woodruff, Steven, Chorpening, Benjamin, & Buric, Michael. Observation of temperature dependence of the IR hydroxyl absorption bands in silica optical fiber. United States. doi:10.1016/j.yofte.2016.01.004.
Yu, Li, Bonnell, Elizabeth, Homa, Daniel, Pickrell, Gary, Wang, Anbo, Ohodnicki, P. R., Woodruff, Steven, Chorpening, Benjamin, and Buric, Michael. 2016. "Observation of temperature dependence of the IR hydroxyl absorption bands in silica optical fiber". United States. doi:10.1016/j.yofte.2016.01.004.
@article{osti_1366439,
title = {Observation of temperature dependence of the IR hydroxyl absorption bands in silica optical fiber},
author = {Yu, Li and Bonnell, Elizabeth and Homa, Daniel and Pickrell, Gary and Wang, Anbo and Ohodnicki, P. R. and Woodruff, Steven and Chorpening, Benjamin and Buric, Michael},
abstractNote = {},
doi = {10.1016/j.yofte.2016.01.004},
journal = {Optical Fiber Technology},
number = C,
volume = 30,
place = {United States},
year = 2016,
month = 7
}
  • Hydroxyl groups on the surface of Li{sub 2}O were studied by using a diffuse reflectance method with Fourier transform infrared spectroscopy at high temperature up to 833K under controlled D{sub 2}O or D{sub 2} partial pressure. Multiple peaks due to the stretching vibration of O-D were observed at 2748, 2717, 2660, 2620, 2540, 2520, 2490cm{sup -1} showing a different behavior with temperature or atmosphere. When D{sub 2} was added to the sweep gas, peak intensity of 2660 and 2620cm{sup -1} decreased. This result indicates that the surface nature is influenced by oxygen potential. Assignment of observed peaks to the surfacemore » nature was also discussed. 6 refs., 11 figs.« less
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  • Room temperature optical absorption process is observed in ultrathin quantum wells (QWs) and quantum dots (QDs) of InP/GaAs type-II band alignment system using surface photovoltage spectroscopy technique, where no measurable photoluminescence signal is available. Clear signature of absorption edge in the sub band gap region of GaAs barrier layer is observed for the ultrathin QWs and QDs, which red shifts with the amount of deposited InP material. Movement of photogenerated holes towards the sample surface is proposed to be the main mechanism for the generation of surface photovoltage in type-II ultrathin QWs and QDs. QDs of smaller size are foundmore » to be free from the dislocations as confirmed by the high resolution transmission electron microscopy images.« less
  • The temperature dependence of the intervalence transfer (IT) band for the transition [(bpy)[sub 2]ClRu[sup II](pz)RU[sup III]/(NH[sub 3])[sub 5]][sup 4+] [yields] [(bpy)[sub 2]/ClRu[sup III](pz)Ru[sup II](NH[sub 3])[sub 5]][sup 4+] (pz = pyrazine; bpy = pyrazine; bpy = 2,2[prime]-bipyridine) has been studied in CH[sub 3]OD and in a nitrile solvent mixture. The temperature dependences of E[sub 1/2] for the component Ru[sup III/II] couples in this complex were also studied by cyclic voltammetry. The temperature dependence of the absorption band, which was quite large, ([alpha]E[sub op]/[alpha]T) = -10 cm[sup [minus]1] K[sup [minus]1] in CH[sub 3]OD, [mu] = 0.035 M, was found to be themore » same, within experimental error, as the temperature dependence of the difference between the E[sub 1/2] values for the Ru[sup III/II] couples. This agreement provides experimental evidence that the absorption band energy includes the free energy change between the initial and final states and not just the change in enthalpy or internal despite the inability of the dielectric continuum model to account for the solvent-dependent behavior of this dimer. A quantum mechanical model is also found to predict that the absorption band energy should be temperature dependent because the band energy depends upon the free energy change. 49 refs., 7 figs., 4 tabs.« less