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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Characterization and alignment of acousto-optic devices using digital tailored RF waveforms.

Konstantin B Yushkov, Grigorii D Slinkov, Vasily V Gurov

|October 18, 2022

Summary

Accurate alignment of acousto-optic (AO) devices is vital for optimal performance. This study introduces a simple routine using a programmable RF waveform generator for efficient testing and alignment of AO deflectors and filters.

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Area of Science:

Optics and Photonics
Electrical Engineering
Signal Processing

Background:

Acousto-optic (AO) devices are essential for light control and processing in diverse applications, from labs to space platforms.
Precise alignment and calibration of AO deflectors and tunable filters are critical for their specified performance.
Existing alignment methods can be complex and time-consuming.

Purpose of the Study:

To present a straightforward and effective routine for testing and aligning acousto-optic devices.
To enable single-shot measurement of diffraction efficiency versus RF signal parameters.
To provide accessible MATLAB code for implementation and demonstration.

Main Methods:

Utilizing a programmable radio frequency (RF) waveform generator to produce tailored test signals.
Employing specially designed RF waveforms to measure AO device diffraction efficiency.
Characterizing AO deflectors and two types of AO tunable filters.

Main Results:

Demonstrated a simple routine for accurate alignment and calibration of AO devices.
Enabled efficient single-shot measurement of diffraction efficiency across varying RF frequencies and amplitudes.
Provided functional MATLAB code for practical application and testing.

Conclusions:

The developed routine offers a simple yet effective method for AO device alignment and calibration.
This approach enhances the operational accuracy and performance of acousto-optic systems.
The availability of MATLAB code facilitates wider adoption and implementation in research and industry.