Difference between revisions of "Exotic Ultrasonics for the real world"

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==details==
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[[Image:Ultrafast_Camera.PNG | 300px | right]]
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Grant Number:
 
  
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Staff involved:
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We have developed a custom CMOS linear array detector for picosecond ultrasound measurements. We have used the detector for spectroscopy and imaging.
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The linear array camera has a very large photon capacity to allow it to reach high signal to noise rations to enable us to see the tiny signals present in our experiments. The cameras can be locked to a wide range of modulation frequencies.
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This new detector allows imaging of the sample properties, such as coating thickness, over large areas where previously only point measurements were feasible.
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[[Image:Ultrafast_Thicknessline.png | 300px | right]]
  
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other things to add.
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[[Image:Ultrafast_PaperFig.png | 300px | right]]
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==Introduction==
 
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The project was to investigate ways to make high frequency ultrasonic measurements more practical and applicable to real world applications.
 
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Our approach to improve the utility of these experiments is to dramatically reduce experiment time by parallelizing the measurements. Two approaches were adopted - developing high frequency parallel camera working in the 1-10 GHZ range for real time measurement of the ultrasonic signals, and parallelization of the traditional approach of lock in detection.
 
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Picosecond laser ultrasound is an established technique for material characterization. The frequencies involved span from ~1 - 100's of GHz.
 
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tbc.
 
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==Achievements==
 
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[[Image:Ultrafast_Camera.PNG | 150px | right]]
 
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we have built two generations of modulated light cameras specially designed for pump probe measurements. The first device had 64 pixels and
 
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== Significant Results ==
 
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==Publications==
 

Revision as of 13:46, 1 April 2011

Ultrafast Camera.PNG

We have developed a custom CMOS linear array detector for picosecond ultrasound measurements. We have used the detector for spectroscopy and imaging. The linear array camera has a very large photon capacity to allow it to reach high signal to noise rations to enable us to see the tiny signals present in our experiments. The cameras can be locked to a wide range of modulation frequencies. This new detector allows imaging of the sample properties, such as coating thickness, over large areas where previously only point measurements were feasible.

Ultrafast Thicknessline.png
Ultrafast PaperFig.png
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