Title :
Self-mixing laser Doppler: a model for extracorporeal blood flow measurement
Author :
Norgia, Michele ; Pesatori, Alessandro ; Rovati, Luigi
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy
Abstract :
A theory is developed to study the spectral characteristics of the signal acquired from self-mixing laser Doppler of extracorporeal blood flow. Doppler shifts is generated by erythrocyte cells interacting with the illumination photons. The resulting signal is mixed in the laser cavity to generate the sensor output. In order to predict analytically the spectrum of the Doppler signal, is assumed:week optical feedback, single scattering event and a Gaussian illumination beam. Predictions are verified by measurements on blood in extracorporeal circulation system.
Keywords :
Doppler measurement; Doppler shift; blood flow measurement; cellular biophysics; laser velocimeters; Doppler shifts; Doppler signal spectrum; Gaussian illumination beam; erythrocyte cells; extracorporeal blood flow measurement; extracorporeal circulation system; illumination photons; laser cavity; optical feedback; self-mixing laser Doppler; spectral characteristics; Blood flow; Doppler shift; Fluid flow measurement; Laser feedback; Laser modes; Laser theory; Lighting; Optoelectronic and photonic sensors; Sensor phenomena and characterization; Signal generators; Biomedical measurements; Blood flow measurement; Optical data processing; Optical interferometry; Optical velocity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2010 IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-2832-8
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2010.5488031
