Broadband phase and intensity compensation with a deformable mirror for an interferometric nuller

Peters, Robert; Lay, Oliver P.; Jeganathan, Muthu

doi:10.1364/ao.47.003920

Cited by 14 publications

(16 citation statements)

References 9 publications

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“…Milestone #1: the compensation of intensity and phase demonstrated by the Adaptive Nuller testbed. Intensity was compensated to within 0.2% and phase to within 5 nm rms across a 3-m band centered at 10-m [7]. This is consistent with the flight requirement of the mission.…”

Section: Introduction and Overviewsupporting

confidence: 69%

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New technologies for exoplanet detection with mid-IR interferometers

Lawson

Lay

Martin

et al. 2011

EPJ Web of Conferences

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Section: Introduction and Overviewsupporting

confidence: 69%

“…The results of initial research on intensity and phase compensation were published by Peters et al [7], based on results up until March/April 2007. This demonstrated phase compensation to better than 5 nm rms across the 8-12 m band and intensity compensation to better than 0.2%.…”

Section: Adaptive Nullingmentioning

confidence: 99%

New technologies for exoplanet detection with mid-IR interferometers

Lawson

Lay

Martin

et al. 2011

EPJ Web of Conferences

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“…Intensity was compensated to within 0.2% and phase to within 5 nm rms across a 3-µm band centered at 10-µm [5]. This is consistent with the flight requirement of the mission.…”

Section: Introduction and Overviewsupporting

confidence: 68%

Technology challenges for exoplanet detection with mid-IR interferometry

Lawson

Lay

Martin

et al. 2017

International Conference on Space Optics — ICSO 2008

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“…All the criteria of the demonstration were met and we therefore conclude that the goals of the demonstration were accomplished. Under the technology program at the Jet Propulsion Laboratory for the development of infrared nulling for TPF-I, the principal optical tasks were divided into achromatic phase shifting architecture evaluations (Gappinger et al 2009), adaptive nulling (Peters et al 2008), single mode fiber development (Ksendzov et al 2007(Ksendzov et al , 2008, and four-beam nulling. That work, which achieved the goals of adaptive nulling at the 10 −5 level over a 30% bandwidth and of higher mode suppression in single mode fibers of 1.5 × 10 4 , together with the starlight suppression of more than seven orders of magnitude and the planet detections reported here, met all the performance goals set for the technology program.…”

Section: Discussionmentioning

confidence: 99%

“…tip/tilt control, fast optical path difference control (metrology), slow optical path difference control (fringe tracking), equal intensity calibration, calibration of fringe tracking set points and adaptive nulling (a broadband phase and amplitude correction technique Peters et al 2008). With the exception of adaptive nulling, all of these are represented in the PDT with an architecture that is scalable to flight.…”

Section: Appendix A: Differences Between Flight and The Laboratory Dementioning

confidence: 99%

Demonstration of exoplanet detection using an infrared telescope array

Martin¹,

Booth

2010

A&A

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Context. Technology is being developed for the characterization and detection of small, Earth-size exoplanets by nulling interferometry in the mid-infrared waveband. While high-performance nulling experiments have shown the possibility of using the technique, to achieve these goals, nulling has to be done on multiple beams, with high stability over periods of hours. To address the issues of the perceived complexity and difficulty of the method, a testbed was developed for the Terrestrial Planet Finder Interferometer (TPF-I) project which would demonstrate four beam nulling and faint exoplanet signal extraction at levels traceable to flight requirements. Containing star and planet sources, the testbed would demonstrate the principal functional processes of the TPF-I beam-combiner by generating four input beams of star and planet light, and recovering the planet signature at the output. Aims. Here we report on experiments designed with traceability to a flight system, showing faint exoplanet signal detection in the presence of strong starlight. The experiments were designed to show nulling at the flight level of ≈10 −5 , starlight suppression of 10 −7 or better, and detection of an exoplanet at a contrast of 10 −6 compared to the star. This performance level meets the flight requirements for the parts of the detection process that can be demonstrated using a monochromatic source. To achieve these results, the testbed would have to operate stably for several hours, showing control of disturbances at levels equivalent to the flight requirements. Methods. A test process was designed which would show that the necessary performance could be achieved. To show reproducibility, the tests were run on three separate occasions, separated by several days. The tests were divided into three main parts which would show first, starlight suppression, second, a realistic faint exoplanet signal production, and finally, exoplanet signal detection in the presence of the starlight. Results. A number of data sets were acquired showing the achievement of the required performance. The data reported here show nulling at levels between about 5.5 and 8.5 × 10 −6 , starlight suppression between 8.4 × 10 −9 and 1.4 × 10 −8 , and detection of planet signals with contrast to the star between 3.8 × 10 −7 and 4.4 × 10 −7 . The signal to noise ratios for the detections were between 14.0 and 26.9. These data met all the criteria of the demonstration, showing reproducible stable performance over several hours of operation. Conclusions. These data show the successful execution, at flight-like performance levels, of almost the whole exoplanet detection process using a four beam, nulling beam-combiner.

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Broadband phase and intensity compensation with a deformable mirror for an interferometric nuller

Cited by 14 publications

References 9 publications

New technologies for exoplanet detection with mid-IR interferometers

New technologies for exoplanet detection with mid-IR interferometers

Technology challenges for exoplanet detection with mid-IR interferometry

Demonstration of exoplanet detection using an infrared telescope array

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