System for precise balancing and controlled unbalancing of fiber-optic interferometers

Area of Science:

• Optics and Photonics
• Fiber Optic Technology
• Interferometry

Background:

• All-fiber optical interferometers are crucial for various sensing applications.
• Precise control over optical path difference (OPD) is essential for interferometer performance.
• Existing methods for OPD balancing and unbalancing can be complex and lack precision.

Purpose of the Study:

• To develop and demonstrate a system for accurate balancing and controlled unbalancing of OPD in all-fiber optical interferometers.
• To achieve high-precision control over OPD for interferometers with varying arm lengths and initial OPDs.

Main Methods:

• Implementation of a novel system for active OPD control within all-fiber interferometers.
• Testing the system across interferometers with arm lengths ranging from 1 to 30 meters.
• Utilizing a precision feedback mechanism to achieve desired OPD states.

Main Results:

• Successful balancing of interferometers with initial OPDs up to 1 cm to within a 5-micrometer range.
• Demonstrated controlled unbalancing of arbitrary all-fiber interferometers with precision better than 5 micrometers.
• The system proved effective for a range of interferometer configurations and initial conditions.

Conclusions:

• The developed system offers a robust solution for precise OPD management in all-fiber interferometers.
• This technology enables enhanced performance and new applications for fiber optic sensing.
• The achieved precision surpasses previous limitations, opening avenues for more sensitive measurements.