etalon

A spectroscopic instrument used to measure and control optical wavelengths. Also known as an

interferometer, an etalon comprises two parallel reflecting plane surfaces. Etalons are widely used in lasers.

See also Fabry-Perot laser.

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• Radio Control (R/C) Radio Service
• Radio Frequency Interference (RFI)
• radio frequency (RF)
• radio guide (RG)
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• radiophone
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• rain attenuation
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• RATT (R1022 ATM Technology Testbed)