000257290 001__ 257290
000257290 005__ 20190619220049.0
000257290 0247_ $$2doi$$a10.1063/1.5019444
000257290 02470 $$a10.1063/1.5019444$$2DOI
000257290 037__ $$aARTICLE
000257290 245__ $$aStudy of additive manufactured microwave cavities for pulsed optically pumped atomic clock applications
000257290 260__ $$c2018
000257290 269__ $$a2018
000257290 336__ $$aJournal Articles
000257290 520__ $$aAdditive manufacturing (AM) of passive microwave components is of high interest for the cost-effective and rapid prototyping or manufacture of devices with complex geometries. Here, we present an experimental study on the properties of recently demonstrated microwave resonator cavities manufactured by AM, in view of their applications to high-performance compact atomic clocks. The microwave cavities employ a loop-gap geometry using six electrodes. The critical electrode structures were manufactured monolithically using two different approaches: Stereolithography (SLA) of a polymer followed by metal coating and Selective Laser Melting (SLM) of aluminum. The tested microwave cavities show the desired TE011-like resonant mode at the Rb clock frequency of ≈6.835 GHz, with a microwave magnetic field highly parallel to the quantization axis across the vapor cell. When operated in an atomic clock setup, the measured atomic Rabi oscillations are comparable to those observed for conventionally manufactured cavities and indicate a good uniformity of the field amplitude across the vapor cell. Employing a time-domain Ramsey scheme on one of the SLA cavities, high-contrast (34%) Ramsey fringes are observed for the Rb clock transition, along with a narrow (166 Hz linewidth) central fringe. The measured clock stability of 2.2 × 10−13 τ−1/2 up to the integration time of 30 s is comparable to the current state-of-the-art stabilities of compact vapor-cell clocks based on conventional microwave cavities and thus demonstrates the feasibility of the approach.
000257290 700__ $$aAffolderbach, C.
000257290 700__ $$aMoreno, W.
000257290 700__ $$aIvanov, A. E.
000257290 700__ $$aDebogovic, T.
000257290 700__ $$aPellaton, M.
000257290 700__ $$g106441$$aSkrivervik, Anja$$0242772
000257290 700__ $$ade Rijk, E.
000257290 700__ $$aMileti, G.
000257290 773__ $$tApplied Physics Letters$$j112$$k11$$q113502
000257290 8560_ $$fdaniela.vallat@epfl.ch
000257290 909C0 $$manja.skrivervik@epfl.ch$$0257288$$zMarselli Fuerer, Béatrice$$xU13307$$pMAG
000257290 909CO $$particle$$ooai:infoscience.epfl.ch:257290
000257290 960__ $$abeatrice.marselli@epfl.ch
000257290 973__ $$aEPFL$$sPUBLISHED$$rREVIEWED
000257290 980__ $$aARTICLE
000257290 981__ $$aoverwrite