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étalon But… what is an étalon? Topic of the day: and other

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Presentation on theme: "étalon But… what is an étalon? Topic of the day: and other"— Presentation transcript:

1 étalon But… what is an étalon? Topic of the day: and other
Interferometers But… what is an étalon?

2 L’étalon noir What is an étalon?
My first encounter with the étalon, was when as a kid I watched the movie: L’étalon noir Other meaning of Étalon: Standard étalon de fréquence = fréquency standard A less glorious meaning: a piece of glass…

3 The glass étalon A story that goes back 119 years! (since 1899)
A “Rio Grande” of ink has flown on this topic. Fabry, C; Perot, A (1899). "Theorie et applications d'une nouvelle methode de spectroscopie interferentielle". Ann. Chim. Phys. 16 (7). Charles Fabry Jean-Baptiste Alfred Perot “Pulse propagation in a Fabry-Perot” (Not to be confused with Hercule Poirot) Kastler 1974 – “Nouv. Rev. Optique 5:133 Daussy, Dumanchin, de Witte 1978 – Applied Optics 17:451 Xiao, Maywar, Agrawal 2011– J. Opt. Soc. Am. 28:1685 Luke Horstman 20?? – to be published…

4

5 Field Transmission 1 2 e-ikd t21 r21 e - ikd 2 ~ 2 1

6 Simplest case -- geometrical model
) I 2 T =1 R R 1 2 O A f B e R D

7 FABRY-PEROT WITH GAIN

8 Tilting a Fabry-Perot In time delays: ng(BXD)/c - (BC)/c Not a big difference, but maybe measurable at the larger angles X D A B C

9 tFP In time delays: ng(BXD)/c - (BC)/c Field transmission
We are concerned with phase resonances only Field transmission Interface properties: and At resonance, integer of wavelengths on the projection of on


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