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Optical transfer cavity stabilization using current-modulated injection-locked diode lasers
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Image of FIG. 1.
FIG. 1.

Experimental setup. PBS, polarizing beam splitter; PD, photodiode; FR, Faraday rotator; PS, polarization spectroscopy.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Energy level diagram. (b) Spectrum of to and Rydberg state transitions obtained by scanning the rf modulation frequency . The upper horizontal axis is obtained from Eq. (1). The observed peaks correspond to the labeled transitions shown in part (a). The Autler-Townes splitting of the transitions is observed due to the presence of cooling laser (Refs. 20 and 22). With the red detuning of the light (for MOT operation), the and peaks may be roughly understood as corresponding to two-photon absorption from the ground state, whereas the and peaks arise from stepwise excitation through the state (Ref. 21).

Image of FIG. 3.
FIG. 3.

Frequency drift of the target laser system (Ti:sapphire, ) as a function of time under (a) unlocked and (b) locked conditions.

Image of FIG. 4.
FIG. 4.

(Color online) Frequency drift of the locked target laser system (Ti:sapphire, ) for several time periods over a few months.


Generic image for table
Table I.

Frequency sensitivity of the locked target laser to environmental conditions for , , , , , and . To evaluate Eq. (2), we used the NIST refractive index calculation program (Ref. 24), which is based on the Ciddor equation (Ref. 25).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical transfer cavity stabilization using current-modulated injection-locked diode lasers