Fiber-linked telescope array: description and laboratory tests of a two-channel prototype

Area of Science:

• Astronomy and Astrophysics
• Optical Interferometry
• Radio Astronomy Instrumentation

Background:

• Fiber-linked coherent arrays are crucial for enhancing the resolution of astronomical observations.
• Existing systems often require large, professional-grade telescopes and complex infrastructure.
• There is a need for more accessible and adaptable interferometric systems.

Purpose of the Study:

• To present a complete two-telescope fiber-linked coherent array system.
• To demonstrate the feasibility of using amateur telescopes for advanced interferometry.
• To detail the servo subsystems for precise optical path control.

Main Methods:

• Construction of a two-telescope array using 20-cm amateur telescopes.
• Integration of three servo subsystems: guiding, air path difference nulling, and fiber length control.
• Laboratory testing of the fully integrated system with a star simulator.

Main Results:

• Successful assembly and integration of a functional two-telescope fiber-linked coherent array.
• Demonstration of precise control over guiding, air path difference, and fiber length.
• Validation of system performance through laboratory star simulator tests.

Conclusions:

• A complete, fiber-linked coherent array can be constructed using readily available amateur telescopes.
• The developed servo subsystems enable precise optical path management for interferometry.
• This system offers a cost-effective and adaptable platform for astronomical interferometry research.