Wavemeter based on interferometer: Difference between revisions
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We test our pull-push solenoids and optical switch. We aim to use Arduino UNO as our controller. Today we test using an optical switch to generate the voltage signal. | We test our pull-push solenoids and optical switch. We aim to use Arduino UNO as our controller. Today we test using an optical switch to generate the voltage signal. | ||
[[File:wavemeter_test1.jpg|200px|thumb|left| | [[File:wavemeter_test1.jpg|200px|thumb|left|when the LED is blocked]] | ||
[[File:wavemeter_test2.jpg|200px|thumb|left|when transistor receives signal from LED]] | |||
Revision as of 19:42, 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.
Components
History
Mar 9 We test our pull-push solenoids and optical switch. We aim to use Arduino UNO as our controller. Today we test using an optical switch to generate the voltage signal.
