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A Self-mixing Laser-diode Interferometer for Measuring Basilar Membrane Vibrations Without Opening the Cochlea by Andrei N. Lukashkin; Mikhail E. Bashtanov; Ian J. Russell is a Neuroscience article available to read on EtoBox.

What is A Self-mixing Laser-diode Interferometer for Measuring Basilar Membrane Vibrations Without Opening the Cochlea about?

A laser-diode forms the basis of a displacement sensitive homodyne interferometer suitable for measurements from poorly reflective surfaces. The compact and cost-effective interferometer utilizes the self-mixing effect when laser light reflected from a moving target re-enters the laser cavity and causes phase dependent changes of the lasing intensity. A piezo positioner was used to displace the interferometer with known frequency and amplitude as a basis for real-time calibration of the interferometer's sensitivity. The signal-processing algorithm is described that allows measurements in presence of high amplitude noise leading to variation of the interferometer's operating point. Measurements of sound-induced basilar membrane displacements were made in the intact cochleae of rodents by focusing the laser beam of the interferometer through the transparent round window membrane. The interferometer provides a viable means for making subnanometre mechanical measurements from structures in the inner ears of small mammals, where opening of the cochlea is not practicable.

Who reads A Self-mixing Laser-diode Interferometer for Measuring Basilar Membrane Vibrations Without Opening the Cochlea?

Author

Andrei N. Lukashkin; Mikhail E. Bashtanov; Ian J. Russell

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0165-0270)

Published

2005

Language

EN

Field

Neuroscience (Life Sciences)