Utilizing active single-mode fiber injection for speckle nulling in exoplanet characterization
Abstract
Despite recent advances in high-contrast imaging techniques, high resolution spectroscopy for characterization of exoplanet atmospheres is still limited by our ability to suppress residual starlight speckles at the planet's location. We have demonstrated a new concept for speckle nulling by injecting directly imaged planet light into a single-mode fiber, linking a high-contrast adaptively-corrected coronagraph to a high-resolution spectrograph (diffraction-limited or not). The restrictions on the incident electric field that will couple into the single-mode fiber give the adaptive optics system additional degrees of freedom to suppress the speckle noise on top of destructive interference. We are able to achieve a starlight suppression gains that are an order of magnitude better than conventional techniques in broadband light with minimal planet throughput losses.
Additional Information
© 2017 SPIE. The authors would like to acknowledge the financial support of the Heising-Simons foundation.Attached Files
Published - 104000Y.pdf
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Additional details
- Eprint ID
- 84869
- Resolver ID
- CaltechAUTHORS:20180216-132039857
- Heising-Simons Foundation
- Created
-
2018-02-20Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Astronomy Department
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 10400