Patent ID: 7812960

Claim:
An ultrasound analysis device comprising: a) a substrate with a top and bottom surface, b) a Mach-Zehnder interferometer, comprised of an input wave-guide, two optical channel wave-guides, and an exit wave-guide, formed on the top surface of the substrate wherein one of the two optical channel wave-guides that form the interferometer is longer than the other optical channel wave-guide that forms the interferometer by a length equivalent to one-quarter wavelength of the output wavelength of the laser diode, c) an acoustic signal receiving element located over one of the arms of the interferometer, and d) a laser diode having a characteristic output wavelength attached to the top surface of the substrate, an optical wave-guide formed in the substrate connecting the output of the laser diode to the input of the interferometer and an optical wave-guide connecting the exit of the interferometer to an optical fiber.