Tunable optical filters based on photorefractive holographic gratings

2003 ◽  
Author(s):  
Victor M. Petrov ◽  
A. V. Chamrai ◽  
J. Petter ◽  
T. Tchudi ◽  
M. P. Petrov
Keyword(s):  
Optical Filters ◽  
Holographic Gratings ◽  
Tunable Optical Filters

Tunable optical filters for dense WDM networks

1998 ◽  
Vol 36 (12) ◽  
pp. 50-55 ◽  
Author(s):  
D. Sadot ◽  
E. Boimovich
Keyword(s):  
Optical Filters ◽  
Wdm Networks ◽  
Dense Wdm ◽  
Tunable Optical Filters

Analysis of UV Spectrum of TiO2 and Carbon Doped TiO2 Nanofluids

2017 ◽  
Vol 6 (1) ◽  
pp. 26-29
Author(s):  
A. L. Subramaniyan ◽  
S. Lakshmi Priya ◽  
M. Kottaisamy ◽  
R. Ilangovan
Keyword(s):  
Base Fluid ◽  
Volume Fraction ◽  
Sol Gel ◽  
Optical Filters ◽  
Potential Candidate ◽  
Uv Spectrum ◽  
Carbon Doped ◽  
Heat Transfer Fluids ◽  
Tunable Optical Filters ◽  
Tio2 Nanofluids

Nanofluids are tailored or engineered suspensions of nanoparticles in a suitable base fluid. Nanofluids gained importance as next generation heat transfer fluids due to high thermal conductivity. The nanofluids are also proved as a potential candidate for direct absorption solar collectors (DASC). The present work investigates the optical absorption of TiO2 and carbon doped TiO2 (C-TiO2) nanofluids which is necessary for DASC and tunable optical filters. TiO2 and C-TiO2 are prepared by sol gel and characterized by XRD. Nanoparticles of TiO2 and C-TiO2 with weight fractions of 0.04 are dispersed in water and ethylene glycol to obtain TiO2 and C-TiO2 nanofluids. The nanofluids are investigated for their sedimentation time by gravity sedimentation method. Stability of TiO2 nanofluid is nine times more than C-TiO2 nanofluid with water as base fluid but C-TiO2 nanofluid are found to be efficient absorbers than TiO2 nanofluid in certain wavelength regime as shown by the UV results. We suggest that implementing a low volume fraction of C-TiO2 nanofluid can give high stability and good absorption which is a prerequest for DASC and tunable optical filters.

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