Composite acousto-optic modulation interferometer driven by a single radio frequency source

Area of Science:

• Optics and Photonics
• Interferometry
• Acousto-Optic Modulators

Background:

• Classical acousto-optic modulator (AOM) interferometers often require dual radio-frequency (RF) sources, complicating synchronization and limiting stability.
• Existing methods for amplitude modulation and phase control in AOM interferometers can have limited bandwidth and performance.

Purpose of the Study:

• To present a robust composite acousto-optic modulator (AOM) interferometer driven by a single radio-frequency (RF) source.
• To demonstrate enhanced stability, high-speed phase control, and relaxed component requirements compared to traditional designs.

Main Methods:

• Development of a single-RF driven composite AOM interferometer.
• Integration of an external phase shifter for voltage-tuned amplitude modulation.
• Theoretical and experimental relaxation of diffraction efficiency requirements via a complementary condition.

Main Results:

• Achieved long-term stability through inherent synchronization of the single-RF configuration.
• Demonstrated rapid amplitude modulation and high-speed phase control with enhanced bandwidth using the external phase shifter.
• Validated the complementary condition, reducing the need for high-diffraction-efficiency AOMs.

Conclusions:

• The single-RF AOM interferometer provides a stable and high-performance alternative to dual-RF systems, especially when high-end RF sources are unavailable.
• The design facilitates high-speed phase control and amplitude modulation, broadening the applicability of AOM interferometry.
• This robust interferometry technique holds significant potential for precision metrology, quantum optics, and optical communications.