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

Area of Science:

• Astronomy and Astrophysics
• Optical Engineering

Background:

• Nulling interferometry is a technique for direct exoplanet detection.
• Achieving deep, stable nulls necessitates precise control over beam intensity and phase.

Purpose of the Study:

• To introduce a novel compensator, the Adaptive Nuller, for nulling interferometry.
• To demonstrate the compensator's ability to correct intensity and phase across a specific wavelength range.

Main Methods:

• Utilized a deformable mirror within the Adaptive Nuller.
• Operated the compensator over a wavelength range of 8 to 12 micrometers.
• Measured the performance in terms of rejection ratios and operational bandwidth.

Main Results:

• The Adaptive Nuller successfully corrected intensity and phase as a function of wavelength.
• Achieved a rejection ratio of 82,000:1.
• Demonstrated effectiveness over a bandwidth of 3.2 micrometers centered at 10 micrometers.

Conclusions:

• The Adaptive Nuller is a viable tool for achieving deep, stable nulls in interferometry.
• This technology advances the direct detection of Earth-like exoplanets.
• The compensator's performance validates its potential for astronomical applications.