GriF: The New Three‐dimensional Spectroscopic Mode of PUEO, the Canada‐France‐Hawaii Telescope Adaptive Optics Bonnette: First Observations in the Fabry‐Pérot Scanning Mode

2002 ◽  
Vol 114 (795) ◽  
pp. 563-576 ◽  
Author(s):  
Y. Clénet ◽  
E. Le Coarer ◽  
G. Joncas ◽  
J.‐L. Beuzit ◽  
D. Rouan ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Three Dimensional ◽  
Fabry Perot

Adaptive optics enables three-dimensional single particle tracking at the sub-millisecond scale

2013 ◽  
Vol 102 (17) ◽  
pp. 173702 ◽  
Author(s):  
Manuel F. Juette ◽  
Felix E. Rivera-Molina ◽  
Derek K. Toomre ◽  
Joerg Bewersdorf
Keyword(s):  
Adaptive Optics ◽  
Particle Tracking ◽  
Single Particle ◽  
Three Dimensional ◽  
Single Particle Tracking

scholarly journals Lifting restrictions on coherence loss when characterizing non-transparent hypersonic phononic crystals

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Konrad Rolle ◽  
Dmytro Yaremkevich ◽  
Alexey V. Scherbakov ◽  
Manfred Bayer ◽  
George Fytas
Keyword(s):  
Frequency Domain ◽  
Hybrid Approach ◽  
Three Dimensional ◽  
Phononic Crystals ◽  
Hybrid Technique ◽  
Detection Mechanism ◽  
Pump Probe ◽  
Fabry Perot ◽  
Multilayer Stacks ◽  
Deposition Techniques

AbstractHypersonic phononic bandgap structures confine acoustic vibrations whose wavelength is commensurate with that of light, and have been studied using either time- or frequency-domain optical spectroscopy. Pulsed pump-probe lasers are the preferred instruments for characterizing periodic multilayer stacks from common vacuum deposition techniques, but the detection mechanism requires the injected sound wave to maintain coherence during propagation. Beyond acoustic Bragg mirrors, frequency-domain studies using a tandem Fabry–Perot interferometer (TFPI) find dispersions of two- and three-dimensional phononic crystals (PnCs) even for highly disordered samples, but with the caveat that PnCs must be transparent. Here, we demonstrate a hybrid technique for overcoming the limitations that time- and frequency-domain approaches exhibit separately. Accordingly, we inject coherent phonons into a non-transparent PnC using a pulsed laser and acquire the acoustic transmission spectrum on a TFPI, where pumped appear alongside spontaneously excited (i.e. incoherent) phonons. Choosing a metallic Bragg mirror for illustration, we determine the bandgap and compare with conventional time-domain spectroscopy, finding resolution of the hybrid approach to match that of a state-of-the-art asynchronous optical sampling setup. Thus, the hybrid pump–probe technique retains key performance features of the established one and going forward will likely be preferred for disordered samples.

scholarly journals Adaptive optics in laser processing

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Patrick S. Salter ◽  
Martin J. Booth
Keyword(s):  
Adaptive Optics ◽  
Intensity Distribution ◽  
Laser Processing ◽  
Ultrafast Lasers ◽  
Three Dimensional ◽  
Processing Times ◽  
The Future ◽  
Recent Developments ◽  
Focal Intensity ◽  
Adaptive Laser

AbstractAdaptive optics are becoming a valuable tool for laser processing, providing enhanced functionality and flexibility for a range of systems. Using a single adaptive element, it is possible to correct for aberrations introduced when focusing inside the workpiece, tailor the focal intensity distribution for the particular fabrication task and/or provide parallelisation to reduce processing times. This is particularly promising for applications using ultrafast lasers for three-dimensional fabrication. We review recent developments in adaptive laser processing, including methods and applications, before discussing prospects for the future.

scholarly journals Tridimensional Spectroscopic Techniques: Conference Summary

1995 ◽  
Vol 149 ◽  
pp. 369-381 ◽  
Author(s):  
J. Bland-Hawthorn
Keyword(s):  
Fourier Transform ◽  
Near Infrared ◽  
Three Dimensional ◽  
Spectroscopic Techniques ◽  
Conference Summary ◽  
Wide Range ◽  
Fabry Perot ◽  
Scientific Results ◽  
General Thrust

Over the last four days, we have enjoyed a wide range of talks on developments in three dimensional spectroscopic techniques. The conference organizing committee are to be congratulated for the artful manner in which instrumental presentations were interleaved with talks on the scientific results from these instruments. The general thrust of most talks was to advance the versatility of traditional instruments either through the Jacquinot (throughput) advantage or through the multiplex advantage, or both. A number of groups have attempted to utilize the full aperture of scanning Fabry-Perot and Fourier Transform interferometers. Arguably, Fabry-Perot interferometers have a wider application at present, although imaging Fourier Transform devices appear to have finally arrived, at least in the near infrared.

scholarly journals Three-dimensional adaptive optics ultrahigh-resolution optical coherence tomography using a liquid crystal spatial light modulator

2005 ◽  
Vol 45 (28) ◽  
pp. 3432-3444 ◽  
Author(s):  
Enrique J. Fernández ◽  
Boris Považay ◽  
Boris Hermann ◽  
Angelika Unterhuber ◽  
Harald Sattmann ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Liquid Crystal ◽  
Adaptive Optics ◽  
Spatial Light Modulator ◽  
Three Dimensional ◽  
Optical Coherence ◽  
Light Modulator ◽  
Ultrahigh Resolution

Embedded Fabry-Perot based sensor using three-dimensional printing technology

2017 ◽  
Author(s):  
Catarina S. Monteiro ◽  
Bruno F. Santos ◽  
Susana O. Silva ◽  
Paulo Abreu ◽  
Maria T. Restivo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Printing Technology ◽  
Three Dimensional Printing ◽  
Fabry Perot ◽  
Dimensional Printing
Sign in / Sign up

Export Citation Format

Share Document