Pulsed laser Doppler flowmetry for increased signal-to-noise ratio and probed depth

2003 ◽  
Author(s):  
Wiendelt Steenbergen ◽  
Roy G. M. Kolkman ◽  
Sven Woldberg ◽  
Frits F. M. de Mul
Keyword(s):  
Laser Doppler Flowmetry ◽  
Signal To Noise Ratio ◽  
Pulsed Laser ◽  
Laser Doppler ◽  
Signal To Noise ◽  
Doppler Flowmetry ◽  
Noise Ratio

Three-Dimensional Optical Bit Memory in Sm(DBM)3Phen-Doped and Un-Doped Poly(methyl methacrylate)

2011 ◽  
Vol 284-286 ◽  
pp. 2251-2254
Author(s):  
Zhao Gang Nie ◽  
Xin Zhong Li ◽  
Yu Ping Tai ◽  
Ki Soo Lim ◽  
Myeongkyu Lee
Keyword(s):  
Refractive Index ◽  
Methyl Methacrylate ◽  
Signal To Noise Ratio ◽  
Three Dimensional ◽  
Pulsed Laser ◽  
High Signal ◽  
Signal To Noise ◽  
Fluorescent Signal ◽  
Poly Methyl Methacrylate ◽  
Noise Ratio

The feasibility of three-dimensional optical bit memory is demonstrated by using the change of fluorescence and refractive index in Sm(DBM)3Phen-doped and un-doped Poly(methyl methacrylate). After a femtosecond pulsed laser irradiation, a refractive-index bit and a fluorescent bit can be formed at the same position inside the bulk sample. Multilayer patterns recorded by tightly focusing the pulsed laser beam were read out by a reflection-type fluorescent confocal microscope, which can detect the reflection signal and also the fluorescent signal of the stored bits. The signal-to-noise ratio via the two retrieval modes was compared as a function of recording depth. The stored bits were retrieved with a high signal-to-noise ratio in the absence of any crosstalk and the detection of the fluorescent signal enables retrieval of the stored bits with a higher S/N ratio.

scholarly journals Pulsed-laser Doppler flowmetry provides basis for deep perfusion probing

2001 ◽  
Vol 72 (11) ◽  
pp. 4242-4244 ◽  
Author(s):  
Roy G. M. Kolkman ◽  
Erwin Hondebrink ◽  
René A. Bolt ◽  
Wiendelt Steenbergen ◽  
Frits F. M. de Mul
Keyword(s):  
Laser Doppler Flowmetry ◽  
Pulsed Laser ◽  
Laser Doppler ◽  
Doppler Flowmetry

Pulsed laser-Doppler flowmetry for monitoring deep perfusion

2001 ◽  
Author(s):  
Roy G. M. Kolkman ◽  
Erwin Hondebrink ◽  
Rene A. Bolt ◽  
Wiendelt Steenbergen ◽  
Frits F. M. de Mul
Keyword(s):  
Laser Doppler Flowmetry ◽  
Pulsed Laser ◽  
Laser Doppler ◽  
Doppler Flowmetry
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