Interference method for ultra-precision measurement and compensation of laser beam angular deflection

Area of Science:

• Optics and Photonics
• Precision Metrology

Background:

• Accurate measurement of laser beam angular deflection is crucial for various scientific and industrial applications.
• Existing methods may lack the required resolution or compactness for certain applications.

Purpose of the Study:

• To propose and experimentally verify a new interferometric method for ultra-precise measurement of laser-beam angular deflection.
• To demonstrate the capability of measuring angular tilt of a device relative to the beam axis.
• To achieve ultrahigh resolution in measuring laser beam instability.

Main Methods:

• Development of an interferometric method based on interference fringe period analysis.
• Theoretical formulation of the measurement principle.
• Experimental verification of the proposed technique.

Main Results:

• The proposed method allows for ultra-precise measurement of laser beam angular deflection.
• Resolution reaching single nanoradians was achieved.
• The method enables measurement of angular tilt of a device relative to the beam axis.
• The technique is suitable for compact design implementations.

Conclusions:

• The novel interferometric method offers an ultrahigh-resolution solution for laser beam angular deflection measurement.
• The technique facilitates precise measurement and compensation of laser beam deflections in compact systems.
• This advancement has potential applications in fields requiring high laser beam stability.