In-volume waveguides by fs-laser direct writing in rare-earth-doped fluoride glass and phosphate glass

2009 ◽  
Author(s):  
D. Esser ◽  
D. Wortmann ◽  
J. Gottmann
Keyword(s):  
Rare Earth ◽  
Phosphate Glass ◽  
Fluoride Glass ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Fs Laser ◽  
Rare Earth Doped

scholarly journals Advanced Micro-Actuator/Robot Fabrication Using Ultrafast Laser Direct Writing and Its Remote Control

2020 ◽  
Vol 10 (23) ◽  
pp. 8563
Author(s):  
Sangmo Koo
Keyword(s):  
Three Dimensional ◽  
Processing Technique ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Precise Control ◽  
Two Photon ◽  
Non Invasive ◽  
Acoustic Control ◽  
Fs Laser ◽  
Invasive Control

Two-photon polymerization (TPP) based on the femtosecond laser (fs laser) direct writing technique in the realization of high-resolution three-dimensional (3D) shapes is spotlighted as a unique and promising processing technique. It is also interesting that TPP can be applied to various applications in not only optics, chemistry, physics, biomedical engineering, and microfluidics but also micro-robotics systems. Effort has been made to design innovative microscale actuators, and research on how to remotely manipulate actuators is also constantly being conducted. Various manipulation methods have been devised including the magnetic, optical, and acoustic control of microscale actuators, demonstrating the great potential for non-contact and non-invasive control. However, research related to the precise control of microscale actuators is still in the early stages, and in-depth research is needed for the efficient control and diversification of a range of applications. In the future, the combination of the fs laser-based fabrication technique for the precise fabrication of microscale actuators/robots and their manipulation can be established as a next-generation processing method by presenting the possibility of applications to various areas.

Femtosecond-laser direct writing for spatially localized synthesis of PPV

2017 ◽  
Vol 5 (14) ◽  
pp. 3579-3584 ◽  
Author(s):  
Oriana I. Avila ◽  
Juliana M. P. Almeida ◽  
Franciele R. Henrique ◽  
Ruben D. Fonseca ◽  
Gustavo F. B. Almeida ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Photon Absorption ◽  
Direct Laser Writing ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Thermal Reactions ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Direct Laser ◽  
Fs Laser

Conversion of PTHT into PPV is achieved by direct laser writing. Fs-laser pulses induce photo-thermal reactions due to two-photon absorption, resulting in the microscopic control of PPV polymerization. Such methodology is a promising way towards the fabrication of arbitrary polymeric microcircuits.

Surface Microfabrication of Conventional Glass Using Femtosecond Laser for Microfluidic Applications

2017 ◽  
Vol 11 (6) ◽  
pp. 878-882 ◽  
Author(s):  
Takuma Niioka ◽  
◽  
Yasutaka Hanada
Keyword(s):  
High Resolution ◽  
Microfluidic Chip ◽  
High Speed ◽  
Single Cell Analysis ◽  
Glass Slide ◽  
Cell Analysis ◽  
Microfluidic Chips ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Fs Laser

Recently, a lot of attention has been paid to a single-cell analysis using microfluidic chips, since each cell is known to have several different characteristics. The microfluidic chip manipulates cells and performs high-speed and high-resolution analysis. In the meanwhile, femtosecond (fs) laser has become a versatile tool for the fabrication of microfluidic chips because the laser can modify internal volume solely at the focal area, resulting in three-dimensional (3D) microfabrication of glass materials. However, little research on surface microfabrication of materials using an fs laser has been conducted. Therefore, in this study, we demonstrate the surface microfabrication of a conventional glass slide using fs laser direct-writing for microfluidic applications. The fs laser modification, with successive wet etching using a diluted hydrofluoric (HF) acid solution, followed by annealing, results in rapid prototyping of microfluidics on a conventional glass slide for fluorescent microscopic cell analysis. Fundamental characteristics of the laser-irradiated regions in each experimental procedure were investigated. In addition, we developed a novel technique combining the fs laser direct-writing and the HF etching for high-speed and high-resolution microfabrication of the glass. After establishing the fs laser surface microfabrication technique, a 3D microfluidic chip was made by bonding the fabricated glass microfluidic chip with a polydimethylsiloxane (PDMS) polymer substrate for clear fluorescent microscopic observation in the microfluidics.

Luminescent Properties of Rare Earth Doped AlF3-Based Glasses

1991 ◽  
Vol 244 ◽  
Author(s):  
L. R. Copeland ◽  
W. A. Reed ◽  
M. R. Shahriari ◽  
T. Iqbal ◽  
P. Hajcak ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Fibers ◽  
Luminescent Properties ◽  
Rare Earth Ions ◽  
Ion Concentration ◽  
Fluoride Glass ◽  
Oxide Glasses ◽  
Low Loss ◽  
Rare Earth Ion ◽  
Rare Earth Doped

ABSTRACTRare earth ions can easily be incorporated into fluoride glasses in moderate to large concentrations and, due to their low phonon energy, these glasses appear to have many advantages over oxide glasses as hosts for rare earth ions used in optical amplifiers and lasers. We have therefore investigated the optical properties of Pr3+, Pr3+/Yb3+ and Pr3+/Yb3+/Lu3+ doped bulk AIF3-based glass samples as a function of rare earth ion concentration. We find that the addition of 2 wt% of Yb increases the fluorescence of Pr3+ at 1.32 μm by a factor of 35 when excited with 488 nm radiation. The fluorescence intensity and excited state lifetimes are found to be comparable to those measured for Pr in a ZBLAN host. Since it has also been demonstrated that optical fibers drawn from AIF3-based glasses exhibit relatively low loss (< 0.05 dB/m) and posses superior chemical durability compared to other fluotide glasses, it is possible that AIF3 glasses may become the fluoride glass of choice for practical fiber laser and amplifier applications.

Rare earth doped fluoride glass ceramics: Fabrication of waveguides by PVD and application

2009 ◽  
Author(s):  
Brigitte Boulard ◽  
G. Alombert-Goget ◽  
Inna Savelii ◽  
O. Peron ◽  
Y. Gao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Glass Ceramics ◽  
Fluoride Glass ◽  
Rare Earth Doped

Spectroscopy and characterisation of rare-earth doped PZG and ZBLA fluoride glass planar waveguides

1997 ◽  
Vol 72-74 ◽  
pp. 321-323 ◽  
Author(s):  
M.C.Marco de Lucas ◽  
C. Garapon ◽  
E. Lebrasseur ◽  
J. Mugnier ◽  
B. Jacquier ◽  
...  
Keyword(s):  
Rare Earth ◽  
Planar Waveguides ◽  
Fluoride Glass ◽  
Rare Earth Doped

Surface cleaning and etching of rare-earth-doped phosphate glass

2001 ◽  
Author(s):  
Amy S. Barnes ◽  
Carlo G. Pantano ◽  
Samuel D. Conzone
Keyword(s):  
Rare Earth ◽  
Phosphate Glass ◽  
Surface Cleaning ◽  
Rare Earth Doped

Sol-gel synthesis of rare-earth-doped fluoride glass thin films

1996 ◽  
Vol 11 (4) ◽  
pp. 841-849 ◽  
Author(s):  
John Ballato ◽  
Matthew Dejneka ◽  
Richard E. Riman ◽  
Elias Snitzer ◽  
Weimin Zhou
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Sol Gel ◽  
Fluoride Glass ◽  
Silicon Substrates ◽  
Fluorescence Studies ◽  
Glass Rods ◽  
Sol Gel Films ◽  
Sol Gel Synthesis ◽  
Rare Earth Doped

This paper describes ZBLA fluoride glass thin films produced via an inexpensive, low-temperature reactive atmosphere sol-gel approach. Luminescence from erbium at 1.55 μm has been observed in x-ray-amorphous doped films deposited on calcium fluoride, polyimide, sapphire, and silicon substrates. Fluorescence studies of the erbium 4S3/2 → 4I13/2 transition, a characteristic emission for a reduced phonon energy host, were conducted for both sol-gel-derived films and conventionally prepared glass rods. The peak intensity observed from the sol-gel films was blue-shifted by 16 nm with a FWHM value approximately half that measured for the melt-quenched rods. Excitation studies indicate that, unlike conventionally prepared glasses, sol-gel materials suffer from nonradiative relaxation of the 4S3/2 excited state to the 4I9/2 level, where subsequent radiative emission to the 4I15/2 ground state occurs. The proposed source of the quenching mechanism are remnant species inherent to the sol-gel process. While this causes the luminescence behavior of rare-earth-doped sol-gel-derived fluoride materials to be similar to oxide hosts, these remnant species modify the branching ratios, resultantly leading to a novel 824 nm emission when excited at 488 nm.

Down-converter based on rare earth doped fluoride glass to improve Si-based solar cell efficiency

2011 ◽  
Author(s):  
G. Alombert Goget ◽  
D. Ristic ◽  
A. Chiasera ◽  
S. Varas ◽  
M. Ferrari ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solar Cell ◽  
Fluoride Glass ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Rare Earth Doped
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