A multiple frequency heterodyne technique for the measurement of long gauges

Autor: K J Siemsen, L Marmet, R F Siemsen, J E Decker, J R Pekelsky
Jazyk: angličtina
Rok vydání: 1996
Předmět:
Popis: A long gauge in the form of a thick-walled tube is converted to a Fabry-Perot cavity by attaching partial reflectors to its ends. The length of this gauge is determined from a number of absolute frequency measurements of the cavity resonances. A set of tunable, well-known CO2 laser frequencies is used for lengths between 1 m and 10 m.
Databáze: OpenAIRE