Optical loss mechanisms in nanocomposite sol-gel planar waveguides

1997 ◽  
Author(s):  
Rui M. Almeida ◽  
Paulo J. Morais ◽  
H. C. Vasconcelos
Keyword(s):  
Sol Gel ◽  
Optical Loss ◽  
Planar Waveguides ◽  
Loss Mechanisms

Low optical loss nano-structured $$\mathrm{TiO }_{2}$$ TiO 2 planar waveguides by sol–gel route for photonic crystal applications

2013 ◽  
Vol 46 (1) ◽  
pp. 23-37 ◽  
Author(s):  
T. Touam ◽  
L. Znaidi ◽  
D. Vrel ◽  
I. Hadjoub ◽  
I. N. Kuznetsova ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Sol Gel ◽  
Optical Loss ◽  
Planar Waveguides

Optical loss mechanisms in GeSiON planar waveguides

2002 ◽  
Vol 81 (11) ◽  
pp. 2002-2004 ◽  
Author(s):  
A. V. Osinsky ◽  
R. A. Bellman ◽  
I. A. Akwani ◽  
P. A. Sachenik ◽  
S. L. Logunov ◽  
...  
Keyword(s):  
Optical Loss ◽  
Planar Waveguides ◽  
Loss Mechanisms

Erbium-activated silica–zirconia planar waveguides prepared by sol–gel route

2008 ◽  
Vol 516 (10) ◽  
pp. 3094-3097 ◽  
Author(s):  
Rogéria R. Gonçalves ◽  
Younes Messaddeq ◽  
Alessandro Chiasera ◽  
Yoann Jestin ◽  
Maurizio Ferrari ◽  
...  
Keyword(s):  
Sol Gel ◽  
Planar Waveguides

scholarly journals SiO2-SnO2:Er3+ Glass-Ceramic Monoliths

2018 ◽  
Author(s):  
Lam Thi Ngoc Tran ◽  
Damiano Massella ◽  
Lidia Zur ◽  
Alessandro Chiasera ◽  
Stefano Varas ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Sensors ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Building Blocks ◽  
Spectroscopic Properties ◽  
Silica Matrix ◽  
Rare Earth Ions ◽  
Planar Waveguides

The development of efficient luminescent systems, such as microcavities, solid state lasers, integrated optical amplifiers, optical sensors is the main topic in glass photonics. The building blocks of these systems are glass-ceramics activated by rare earth ions because they exhibit specific morphologic, structural and spectroscopic properties. Among various materials that could be used as nanocrystals to be imbedded in silica matrix, tin dioxide presents some interesting peculiarities, e.g. the presence of tin dioxide nanocrystals allows increase in both solubility and emission of rare earth ions. Here, we focus our attention on Er3+ - doped silica – tin dioxide photonic glass-ceramics fabricated by sol-gel route. Although the SiO2-SnO2:Er3+ could be fabricated in different geometrical systems: thin films, monoliths and planar waveguides we herein limit ourselves to the monoliths. The effective role of tin dioxide as luminescence sensitizer for Er3+ ions is confirmed by spectroscopic measurements and detailed fabrication protocols are discussed.

Fabrication and Characterization of Low-Loss, Sol-Gel Planar Waveguides

1994 ◽  
Vol 66 (8) ◽  
pp. 1254-1263 ◽  
Author(s):  
Lin. Yang ◽  
S. Scott. Saavedra ◽  
Neal R. Armstrong ◽  
John. Hayes
Keyword(s):  
Sol Gel ◽  
Planar Waveguides ◽  
Low Loss ◽  
Fabrication And Characterization

Structural and Spectroscopic Assessment of Er3+-Activated SiO2-HfO2 Glass Ceramics Planar Waveguides

2008 ◽  
Vol 55 ◽  
pp. 56-61
Author(s):  
L. Minati ◽  
Giorgio Speranza ◽  
Yoann Jestin ◽  
Cristina Armellini ◽  
Andrea Chiappini ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Spinodal Decomposition ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Emission Spectra ◽  
Planar Waveguides ◽  
Material Structure ◽  
Crystalline Environment ◽  
Concentration Threshold

Two series of xHfO2 - (100-x) SiO2 (x=10, 20, 30 mol%) glass-ceramics planar waveguides doped with 0.3 mol% Er3+ ions were prepared by the sol-gel route. A thermal treatment at 1000°C was applied to the second series of samples to nucleate HfO2 crystals. The waveguides were analyzed by X-ray photoelectron spectroscopy to study the effect of the Hf concentration and of the annealing on the material structure. XPS shows that in the first series of samples a Hf concentration threshold exists. Above this threshold the material undergoes a spinodal decomposition with formation of HfO2 rich domains. In the second series of samples the presence of thermal treatment lowers the concentration threshold so that the phase separation occurs also at a Hf concentration of 10%mol. In the waveguides where spinodal decomposition in present, the emission spectra from the Er3+ ions reveal a sensible narrowing of the 4I13/2 → 4I15/2 line. This demonstrates the presence of a crystalline environment for the Er3+ ions since the inhomogeneous broadening due to the disordered glassy network is suppressed. These results may have important implications for the fabrication of photonic devices with increased efficiency.

Synthesis of Photosensitive Organic-Inorganic Hybrid Polymers via Anhydrous Sol-Gel Process for Integrated Optics

2003 ◽  
Vol 780 ◽  
Author(s):  
Xinshi Luo ◽  
Congji Zha ◽  
Barry Luther-Davies
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Optical Loss ◽  
Hybrid Polymer ◽  
Optical Losses ◽  
Hybrid Polymers ◽  
Inorganic Hybrid ◽  
Wide Range ◽  
Integrated Optical ◽  
Sol Gel Process

AbstractPhotosensitive organic-inorganic hybrid polymers were synthesised for integrated optical and optoelectronic devices by a non-hydrous sol-gel process of hydrolysis/condensation of 3-methacryloxypropyltrimethoxysilane (MPS), diphenyldimethoxysilane (DPhDMS), and zirconium isopropoxide (TPZ) with boric acid under anhydrous conditions. The methacryl groups of MPS are UVpolymerizable, which are suitable for low cost fabrication of waveguides with a “UV write/develop” process. The incorporation of DPhDMS and TPZ was found useful in reducing the optical loss and in enhancing the thermostability of the polymer. The refractive index of the hybrid polymer is tuneable from 1.4950 to 1.5360 by variation of the ratio among MPS, DPhDMS and TPZ. Optical characterisation showed that the material has low optical losses at the telecommunications windows (0.16 dB/cm at 1310 nm and 0.4 dB/cm at 1550nm). The hybrid polymer also showed a low birefringence (1.2×10-4), a large thermo-optic (TO) coefficient (-2.77 ×10-4), and an outstanding linearity of dn/dT in a wide range of temperature (from 25 °C to 200 °C). Waveguides forming ability for the hybrid polymer with UV imprinting was also demonstrated.

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