For example, I have a single mode fibre based Mach-Zehnder interferometer, when I put it into a temperature stablised enviroment, there would be a linear phase drift? What is the phase drift at different temperatures? Is there any paper talking about this?
This may (or may not) be useful reading: Optical fiber sensors for medical applications — Practical engineering considerations:
- DOI 10.1007/978-3-540-89208-3_559
The phase shift is following the temperature shift. The reason is the temperature dependence of the refractive index of the fiber. For small changes, you can consider it to be linear.
Fiber-optic temperature sensors operate on the absorption/ transmission properties of gallium arsenide crystal semiconductors. Increases in the crystal's temperature have the effect of shifting its transmission spectrum to higher wavelengths, jumping from essentially 0% to 100% at a specific wavelength.
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