A self-mixing interferometer using an external dual cavity
| Autor: | Ming Wang, Guanming Lai |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Laser diode
business.industry Applied Mathematics Physics::Optics Reflector (antenna) Phase detector Signal Displacement (vector) law.invention Interferometry symbols.namesake Optics Fourier transform law Astronomical interferometer symbols business Instrumentation Engineering (miscellaneous) Mathematics |
| Zdroj: | Measurement Science and Technology. 14:1025-1031 |
| ISSN: | 1361-6501 0957-0233 |
| DOI: | 10.1088/0957-0233/14/7/317 |
| Popis: | A novel self-mixing interferometer with a double external cavity was proposed to measure absolute distance and microscopic displacement. The technique developed uses an additional reference reflector to form an external dual cavity between the laser diode and the target. A fast Fourier transform phase detection technique was applied to analyse the self-mixing interferometry signal and a reference external cavity was used to compensate the error due to optical frequency fluctuation. Using these techniques, a distance resolution of 1 mm and displacement resolution down to 10 nm can be obtained. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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