Assessment of a Rubidium ESFADOF Edge-Filter as ... - tuprints

5.2 Vapor Cell I: 270 mT 97
0.20
5.5
0.15
165°C
164°C
163°C
162°C
FWHM / GHz
5.0
4.5
4.0
3.5
Blue peak
Red peak
Transmission
0.10
161°C
160°C
159°C
158°C
157°C
156°C
155°C
154°C
3.0
155 160 165
Temperature / °C
0.05
166°C
0.00
-10 -5 0 5 10
∆ν / GHz
Fig. 5.4: 2D graphical representation of the temperature dependence of
the S-polarization: The experimental parameters are the same as
in Fig. 5.3 and the corresponding cell temperatures are annotated.
This view allows a closer look on the frequency characteristics. The
inset shows the corresponding full width half maximum values for
the red and blue shifted peaks. For the clarity of the representation,
only spectra beyond a cell temperature of T ESFADOF = 154 ◦ C
are included. The spectra from 150 ◦ C to 154 ◦ C do not change
significantly in absolute transmission or in spectral shape. A concentration
of the lower ESFADOF state population in favor of the
red shifted peak can be observed. It indicates that ∆M=+1 transitions
contribute stronger to the spectral characteristics than the
ones for ∆M= −1. This indicates, in spite of the zero frequency
detuning and the linear polarization of the pump beam, a certain
amount of atomic polarization. The dashed curve corresponds to
the ESFADOF transmission breakdown. The considerable change
in spectral shape is striking. A more detailed discussion of the underlying
physics follows in Sec. 5.3.