Achievements and perspectives of optical fiber Fabry–Perot cavities

Pfeifer, Hannes; Ratschbacher, Lothar; Gállego, José T.; Saavedra, Carlos; Faßbender, Alexander; Haaren, Andreas von; Alt, Wolfgang; Hofferberth, Sebastian; Köhl, M.; Lindén, Stefan; Meschede, Dieter

doi:10.1007/s00340-022-07752-8

Cited by 44 publications

(26 citation statements)

References 90 publications

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“…Several different physical platforms are considered for the realization of such nodes [12], of which atoms stored in and strongly coupled to optical cavities offer a good compromise of efficient light matter interaction and long storage times of quantum information [13][14][15][16]. Hence, fiberbased optical cavities [17][18][19] coupling to atomic matter qubits make an attractive solution for directly routing quantum information via fiber links.…”

Section: Introductionmentioning

confidence: 99%

Raman Imaging of Atoms Inside a High-bandwidth Cavity

Uruñuela,

Ammenwerth,

Malik

et al. 2022

Preprint

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High-bandwidth, fiber-based optical cavities are a promising building block for future quantum networks. They are used to resonantly couple stationary qubits such as single or multiple atoms with photons routing quantum information into a fiber network at high rates. In high-bandwidth cavities, standard fluorescence imaging on the atom-cavity resonance line for controlling atom positions is impaired since the Purcell effect strongly suppresses all-directional fluorescence. Here, we restore imaging of 87 Rb atoms strongly coupled to such a fiber Fabry-Pérot cavity by detecting the repumper fluorescence which is generated by continuous and three-dimensional Raman sideband cooling. We have carried out a detailed spectroscopic investigation of the repumper-induced differential light shifts affecting the Raman resonance, dependent on intensity and detuning. Our analysis identifies a compromise regime between imaging signal-to-noise ratio and survival rate, where physical insight into the role of dipole-force fluctuations in the heating dynamics of trapped atoms is gained.

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Section: Introductionmentioning

confidence: 99%

Raman Imaging of Atoms Inside a High-bandwidth Cavity

Uruñuela,

Ammenwerth,

Malik

et al. 2022

Preprint

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“…High finesse fiber Fabry-Perot cavities (FFPCs) [13,14] have evolved as a miniaturized optical cavity platform within the last decade and have been used within numerous different experiments from interfacing single quantum emitters [15][16][17][18][19], to mechanical resonators [20] or for various sensing tasks [21][22][23][24]. They merge the advantages of Fabry-Perot cavities, an open mode volume and tunability of the cavity resonance, with the benefits of miniaturized resonators, a high level of integration, strong field-concentration and a small footprint.…”

Section: Introductionmentioning

confidence: 99%

A fiber Fabry-Perot cavity based spectroscopic gas sensor

Saavedra,

Pandey,

Alt

et al. 2022

Preprint

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Optical spectroscopic sensors are powerful tools for analysing gas mixtures in industrial and scientific applications. Whilst highly sensitive spectrometers tend to have a large footprint, miniaturized optical devices usually lack sensitivity or wideband spectroscopic coverage. By employing a widely tunable, passively stable fiber Fabry-Perot cavity (FFPC), we demonstrate an absorption spectroscopic device that continuously samples over several tens of terahertz. Both broadband scans using cavity mode width spectroscopy to identify the spectral fingerprints of analytes and a fast, low-noise scan method for single absorption features to determine concentrations are exemplary demonstrated for the oxygen A-band. The novel scan method uses an injected modulation signal in a Pound-Drever-Hall feedback loop together with a lock-in measurement to reject noise at other frequencies. The FFPC-based approach provides a directly fiber coupled, extremely miniaturized, light-weight and robust platform for analyzing small analyte volumes that can straightforwardly be extended to sensing at different wavelength ranges, liquid analytes and other spectroscopic techniques with only little adjustments of the device platform.

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“…These mirrors can be used to construct cavities of a small mode volume, for strong coupling between emitter and photons, open-access to the cavity mode for emitter localisation and an intrinsic overlap to a fibre guided mode for photon extraction. However, despite these traits leading to the widespread adoption of FFPCs [13], a range of unresolved issues regarding scalability remain.…”

Section: Introductionmentioning

confidence: 99%

Multi-resonant open-access micro-cavity arrays for light matter interaction

Doherty¹,

Kuhn²,

Kassa³

2022

Preprint

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We report the realisation of a high-finesse open-access cavity array, tailored towards the creation of multiple coherent light-matter interfaces within a compact environment. We describe the key technical developments put in place to fabricate such a system, comprising the creation of tapered pyramidal substrates and an in-house laser machining setup. Cavities made from these mirrors are characterised, by laser spectroscopy, to possess similar optical properties to state-of-the-art fibre-tip cavities, but offer a compelling route towards improved performance, even when used to support only a single mode. The implementation of a 2×2 cavity array and the independent frequency tuning between at least three neighbouring sites are demonstrated.

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Achievements and perspectives of optical fiber Fabry–Perot cavities

Cited by 44 publications

References 90 publications

Raman Imaging of Atoms Inside a High-bandwidth Cavity

Raman Imaging of Atoms Inside a High-bandwidth Cavity

A fiber Fabry-Perot cavity based spectroscopic gas sensor

Multi-resonant open-access micro-cavity arrays for light matter interaction

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