Wavemeter based on interferometer: Difference between revisions
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Revision as of 19:32, 9 March 2021
This project aims to build a wavemeter which can be used to measure laser in our lab precisely.
Team: Qin Qichen, Zhao Qi, Zhang Zhao.
Aim
We aim to build a wavemeter which is used to measure laser in our lab. The range of wavelength our wavemeter can detect is around 1100nm - 1200nm, determined by optics. A precision around 100MHz is expected.
Theory
Michelson interferometer is a good tool to measure the length if there is a good laser. Similarly, it can also be used to measure wavelength. We use a 1550nm laser as our reference. By counting zeros in the signal, we can get the ratio between wavelengths.