Dual cavity interferometer sensor system

A method for capturing pressure and temperature information transmitted by repeated interference of light reflected from a first mirror, a second mirror, and a third mirror, the method operative on:

• a multi-mirror optical sensor having an optical source side and an air source side opposite the optical source side;
• said multi-mirror optical sensor having a single-mode optical fiber connected to an optical source and a photodetector on said optical source side and connected to a hollow tube forming a first Fabry-Perot Interferometer on said air source side, said single-mode optical fiber having an optical fiber core;
• said hollow tube forming a first Fabry-Perot Interferometer having an air cavity, said core of said single-mode optical fiber and said air cavity of said first Fabry-Perot Interferometer forming a first mirror for reflecting optical light from said optical source;
• said air source side of said hollow tube connected to a side-hole optical fiber forming a second Fabry-Perot Interferometer, said side-hole optical fiber having an optical fiber core and at least two hollow cavity holes symmetrically positioned around said optical fiber core of said side-hole optical fiber and running longitudinally the length of said side-hole optical fiber;
• said air cavity of said first Fabry-Perot Interferometer to said optical fiber core of said side-hole optical fiber forming a second mirror for reflecting optical light from said optical source;
• said at least two hollow cavity holes of said side-hole optical fiber providing an air flow channel to said air cavity of said hollow tube from said air source side of said multi-mirror optical sensor;
• and
• the end of said optical fiber core of said side-hole optical fiber at said air source side forming a third mirror for reflecting optical light from said optical source.