Multipass cell design for Stark-modulation spectroscopy
2007
A multipass cell for absorption measurements with an additionally applied
homogeneous electric field for Stark effect measurements is described. The configuration
is based on two ring mirrors, where the laser beam propagates between two nested
cylindrical-wall electrodes. The total optical path length achieved is
40 m. The beam
pointing stability of this setup is investigated and compared to a confocal-type Herriott cell
of the same base length, employing numerical simulations. The exit beam pointing
stability is found to be very good. The response measurements show fast exchange times,
which agree well with theoretical values.
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