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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Multiple-order radial-grating shearing interferometer.

P D Henshaw¹, S K Manlief

¹MIT Lincoln Laboratory, P.O. Box 73, Lexington, Massachusetts 02173, USA.

|April 15, 2010

Summary

A novel shearing interferometer simplifies phase measurements for multiple-aperture optical systems using a rotating radial square wave grating. This technology enables coherent phasing, crucial for advanced optical applications.

Area of Science:

Optics and Optical Engineering
Interferometry
Astronomical Instrumentation

Background:

Coherent phasing of multiple-aperture optical systems is essential for achieving high-resolution imaging.
Traditional phase measurement techniques can be complex and time-consuming.

Purpose of the Study:

To describe a new shearing interferometer for coherent phasing of multiple-aperture optical systems.
To introduce a method simplifying interaperture phase measurements.

Main Methods:

Utilized a rotating radial square wave grating within a shearing interferometer.
Developed theoretical models for phase measurement.
Conducted experimental validation at a 10.6 micrometer wavelength.

Main Results:

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Demonstrated the interferometer's capability for coherent phasing.
Showcased the simplification of interaperture phase measurements.
Experimental results validated the theoretical development.

Conclusions:

The developed shearing interferometer effectively enables coherent phasing.
The use of a rotating radial square wave grating simplifies phase measurements in optical systems.