A microresonator-based etalon for visible light precision radial velocity measurements

Leifer, Stephanie; Savchenkov, Anatoliy A.; Amili, Abdelkrim El; Beichman, Charles; Matsko, Andrey B.; Lai, Yu Hung; Love, Stuart; Strekalov, Dmitry; Schwab, Christian; Maleki, Lute; Halverson, Samuel; Coddington, Ian; Bagheri, Mahmood

doi:10.1117/12.2562369

Cited by 1 publication

(2 citation statements)

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“…These benefits have made etalons attractive calibration sources for the highest precision measurements, and most EPRV facilities now use etalons as part of their calibration strategy. Existing etalon systems include air-gap planar-planar cavities fed by SM or multi-mode optical fibers [450][451][452][453][454][455], entirely-fiber-based interferometer systems [11,456], as well as microresonator-based systems [457]. Each system has distinct benefits and drawbacks, though all require technological improvements to reach the stability levels required for future EPRV instruments (see figure 27).…”

Section: Statusmentioning

confidence: 99%

“…Whispering Gallery Modes (WGM)-based etalons [457] show great promise as compact spectral filters that produce a wide bandwidth of sharp features (see section 10 of the roadmap). WGM etalons are dielectric cavities with curved surfaces where light is trapped by total internal reflection from the dielectric boundary along which it travels; no optical coatings are required.…”

Section: Current and Future Challengesmentioning

confidence: 99%

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2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments

Jovanovic,

Gatkine,

Anugu

et al. 2023

J. Phys. Photonics

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Photonic technologies offer numerous functionalities that can be used to realize astrophotonic instruments. The most spectacular example to date is the ESO Gravity instrument at the Very Large Telescope in Chile that combines the light-gathering power of four 8-m telescopes through a complex photonic interferometer. Fully integrated astrophotonic devices offer critical advantages for instrument development, including extreme miniaturization when operating at the diffraction-limit, plus integration, superior thermal and mechanical stabilization owing to the small footprint, and high replicability offering significant cost savings. Numerous astrophotonic technologies have been developed to address shortcomings of conventional instruments to date, including the development of photonic lanterns to convert from multimode inputs to single mode outputs, complex aperiodic fiber Bragg gratings to filter OH emission from the atmosphere, beam combiners enabling long baseline interferometry with for example, ESO Gravity, and laser frequency combs for high precision spectral calibration of spectrometers. Despite these successes, the facility implementation of photonic solutions in astronomical instrumentation is currently limited because of 1) low throughputs from coupling to fibers, coupling fibers to chips, propagation and bend losses, device losses, etc., 2) difficulties with scaling to large channel count devices needed for large bandwidths and high resolutions, and 3) efficient integration of photonics with detectors. In this roadmap, we identify 23 key areas that need further development. We outline the challenges and advances needed across those areas covering design tools, simulation capabilities, fabrication processes, the need for entirely new components, integration and hybridization and the characterization of devices. To realize these advances the astrophotonics community will have to work cooperatively with industrial partners who have more advanced manufacturing capabilities. With the advances described herein, multi-functional integrated instruments will be realized leading to novel observing capabilities for both ground and space based platforms, enabling new scientific studies and discoveries.

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