Morphology and crystal phase evolution of GeO2 in liquid phase deposition process

Chen, Jing; Sun, Wei; Wang, Wei; Yi, Li; Chu, Junhao

doi:10.1016/j.jcrysgro.2011.11.024

Cited by 7 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optical constants of the GeO 2 reflective layer were extracted according to the Kramers-Kronig relations. 23 The low-loss band of the nickel ATR fiber matches the calculated <1 n r region of the GeO 2 layer inside the nickel tube. The asobserved band shape was different from that of a copper GeO 2 hollow fiber with the same geometric dimensions (see Fig.…”

supporting

confidence: 62%

“…This is important because a highly crystallized GeO 2 hollow fiber is capable of exhibiting a lower transmission loss than a glassy GeO 2 hollow fiber according to the abnormal dispersion of GeO 2 and the classical MS equation. 12,20,23 The nickel GeO 2 ATR hollow fiber had an interesting low-loss window: besides 10.6 lm, it also had a low-loss at another important peak-power wavelength (10.2 lm) for CO 2 laser device (i.e., Coherent Diamond TM and Synrad series lasers). A nickel GeO 2 hollow fiber and a nickel tube (length: 1.05 m, core size: 1.45 mm) were employed to deliver a 31 W, TEM 00 CO 2 laser beam.…”

mentioning

confidence: 99%

“…Having A > B confirmed that front-end clipping was the main cause of thermal damage to the hollow fiber. 23 The higher conductivity k of nickel (Nickel: 90.9 W/ (m K), silica glass: 1.38 W/(m K)) provides the nickel fiber with higher heat dissipation ability (see Eqs. (2) and (3)), and much lower A and B values were observed.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Metallic attenuated total reflection infrared hollow fibers for robust optical transmission systems

Chen

Guo

et al. 2014

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

A durable metallic attenuated total reflection (ATR) hollow fiber (bore size: 1.45 mm, wall thickness: 50 μm) was designed and fabricated based on a nickel capillary tube and hexagonal germanium dioxide (GeO2). The anomalous dispersion of the hexagonal GeO2 layer grown inside a nickel tube achieves low-loss light transmission at two peak-power wavelengths for CO2 laser devices (10.2 and 10.6 μm). An 11–28 W, 10.2 or 10.6 μm CO2 laser power was steadily delivered via a fiber elastically bent from 0° to 90° (radius: 45 cm) for over 40 min (transmission loss: 0.22 to 4.2 dB/m). Theoretically fitting the measured temperatures showed that front-end clipping caused greater thermal loading than the distributed mode absorption. The maximum external temperature of a nickel ATR fiber is much lower than that of a silica glass ATR fiber owing to their different heat dissipation abilities. The HE11 mode purity of the output beam profiles decreased from 90.3% to 44.7% as the bending angle increased from 0° to 90°. Large core sizes and wall roughnesses (scattering loss 0.04 dB/m) contributed to mode mixing and excess losses that were above the value predicted by the classical Marcatili and Schmeltzer equation (0.024–0.037 dB/m).

show abstract

supporting

confidence: 62%

mentioning

confidence: 99%

See 1 more Smart Citation

Metallic attenuated total reflection infrared hollow fibers for robust optical transmission systems

Chen

Guo

et al. 2014

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Both minerals exhibit similar solubility patterns in water; however, the solubility of argutite shows a sharper temperature increase than that of quartz. This difference may be used in optimizing SiO 2 and GeO 2 crystal growth protocols in the lab [28,39,40], and may partly be responsible for the elevated Ge/Si ratios in hightemperature fluids emanating from the oceanic ridges [4,41,42].…”

Section: Discussionmentioning

confidence: 99%

An equation of state for predicting the thermodynamic properties and vapour–liquid partitioning of aqueous Ge(OH)4 in a wide range of water densities

Akinfiev

Plyasunov

Pokrovski

2015

Fluid Phase Equilibria

View full text Add to dashboard Cite

“…An acidic aqueous germanate ion solution was synthesized based on our previous researches [16][17][18][19]. 0.8 g of GeO 2 powders were dissolved in 9.2 ml of 6 M aqueous ammonia.…”

Section: Methodsmentioning

confidence: 99%

Liquid Phase Deposition of GeO2 Glass Hollow Waveguide for Delivery of CO2 Laser Radiation

Chen¹,

Chu²,

et al. 2012

2012 Symposium on Photonics and Optoelectronics

Self Cite

View full text Add to dashboard Cite

CO 2 laser (wavelength 10.6 μm) has important applications in laser surgery, material processing, infrared sensors and imaging. CO 2 laser optical waveguides are gaining a central position in these applications. Glass-drawing technique and sol-gel methods have been used to prepare GeO 2 and germania-based glass hollow waveguides. In this work, a GeO 2 glass hollow waveguide sample was fabricated by using a liquid phase deposition (LPD) approach. The morphology, structure and optical transmission properties of the sample were studied. The results indicate that a GeO 2 glass reflective layer could be formed on the inner wall of a silica glass capillary tube via the LPD process. The GeO 2 glass layer and the substrate silica glass tube constitute an attenuated total reflectance (ATR) hollow waveguide structure. An n r <1 band centering at around 10.6 μm is observed by loss spectrum analysis of the sample. The sample shows a mean loss of 1.13 dB/m for delivery of a ~35 W CO 2 laser beam (TEM 00 ). Keywords-CO 2 laser, GeO 2 glass hollow waveguide, anomalous dispersion, liquid phase deposition (LPD) processI.

show abstract

Morphology and crystal phase evolution of GeO2 in liquid phase deposition process

Cited by 7 publications

References 24 publications

Metallic attenuated total reflection infrared hollow fibers for robust optical transmission systems

Metallic attenuated total reflection infrared hollow fibers for robust optical transmission systems

An equation of state for predicting the thermodynamic properties and vapour–liquid partitioning of aqueous Ge(OH)4 in a wide range of water densities

Liquid Phase Deposition of GeO2 Glass Hollow Waveguide for Delivery of CO2 Laser Radiation

Contact Info

Product

Resources

About