Re: Fabry-Perot interferometer

On 1/30/07 5:17 PM, in article
1170206238.376618.208270@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, "alex"
<aesbrown@xxxxxxxxxxx> wrote:

Is there any benefit to having the incident wave incident oblique to
the etalons. Does this make the transmission at allowed modes more
narrow or spread out?

I am looking at a spectometer and one half conatins has a wedge shaped
etalon and the other half has just the standard parallel ineterfaces.
Why would this be?

Thanks.
ALex

I would think just the opposite. Oblique incidence will cause walk-off.
That reduces the number of bounces and the finesse. That is why a laser
resonator off-axis mode selection. The more reflections that add together
coherently, the sharper the fringes.

Bill
-- Fermez le Bush--about two years to go.


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