High-speed fabrication of optical waveguides inside glasses using a high-repetition-rate fiber CPA system

2004 ◽  
Author(s):  
Matthias Will ◽  
Jonas Burghoff ◽  
Jens Limpert ◽  
Thomas Schreiber ◽  
Stefan Nolte ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Optical Waveguides ◽  
High Speed ◽  
High Repetition Rate ◽  
High Repetition

scholarly journals Confocal Raman imaging of optical waveguides in LiNbO3 fabricated by ultrafast high-repetition rate laser-writing

2008 ◽  
Vol 16 (18) ◽  
pp. 13979 ◽  
Author(s):  
Airán Ródenas ◽  
Amir H. Nejadmalayeri ◽  
Daniel Jaque ◽  
Peter Herman
Keyword(s):  
Repetition Rate ◽  
Optical Waveguides ◽  
High Repetition Rate ◽  
Raman Imaging ◽  
Laser Writing ◽  
High Repetition ◽  
Confocal Raman

scholarly journals High speed laser drilling of metals using a high repetition rate, high average power ultrafast fiber CPA system

2008 ◽  
Vol 16 (12) ◽  
pp. 8958 ◽  
Author(s):  
A. Ancona ◽  
F. Röser ◽  
K. Rademaker ◽  
J. Limpert ◽  
S. Nolte ◽  
...  
Keyword(s):  
Repetition Rate ◽  
High Speed ◽  
Average Power ◽  
Laser Drilling ◽  
High Repetition Rate ◽  
High Average Power ◽  
High Repetition

High speed inscription of uniform, large-area laser-induced periodic surface structures in Cr films using a high repetition rate fs laser

2014 ◽  
Vol 39 (8) ◽  
pp. 2491 ◽  
Author(s):  
A. Ruiz de la Cruz ◽  
R. Lahoz ◽  
J. Siegel ◽  
G. F. de la Fuente ◽  
J. Solis
Keyword(s):  
Repetition Rate ◽  
High Speed ◽  
High Repetition Rate ◽  
Surface Structures ◽  
Large Area ◽  
Periodic Surface ◽  
High Repetition ◽  
Fs Laser

Reacting Pressurized Spray Combustor Dynamics: Part 2 — High Speed Planar Measurements

2016 ◽  
Author(s):  
I. Chterev ◽  
N. Rock ◽  
H. Ek ◽  
T. Smith ◽  
B. Emerson ◽  
...  
Keyword(s):  
Shear Layer ◽  
Repetition Rate ◽  
High Speed ◽  
Liquid Fuel ◽  
High Repetition Rate ◽  
Fluorescence Signal ◽  
Swirl Combustor ◽  
High Repetition ◽  
Planar Laser ◽  
Spray Distribution

This paper describes stereo-PIV, OH-PLIF and fuel-PLIE (planar laser induced emission) measurements in a pressurized, liquid fueled, swirl combustor. Data were obtained at globally fuel lean conditions, combustor pressures of 2–5 bar, and an inlet air temperature of 450 K. The experiments were performed to characterize the flowfield, heat release and fuel spray distribution. Several challenges are associated with OH-PLIF in pressurized, liquid fuel systems at sustained high repetition rates. For example, in addition to the significantly lower pulse energies of high repetition rate systems relative to low repetition rate ones, the ultraviolet laser used to excite OH also causes the fuel to emit, with the brighter liquid fuel signal overlapping the OH fluorescence spectrum. To overcome these challenges, two intensified high-speed cameras were used to maximize signal separation during data collection and perform signal subtraction in post-processing. The first camera used narrow band spectral filtering, and the intensifier was gated to miss much of the slower decaying fuel signal. As a result, it satisfactorily captures the OH fluorescence along with some of the stronger fuel fluorescence signal. The second camera detected primarily fuel emission with the intensifier gate delayed to capture the tail of the longer-lived fuel phosphorescence, and a long-pass spectral filter capturing all the fuel emission. This paper presents illustrative results showing the instantaneous flow field, flame position as indicated by OH-PLIF, and spray distribution from the fuel PLIE. Multiple flame topologies are observed — specifically, flames stabilized in the outer shear layer occur for all the cases studied, but inner shear layer stabilized flames are also seen in the higher pressure cases.

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