Time-domain waveform recovery for integrated optical waveguide pulse electric field sensors

Area of Science:

• Electrical Engineering
• Optoelectronics
• Signal Processing

Background:

• Integrated optical waveguide sensors are crucial for measuring electric fields.
• Non-ideal low-frequency responses distort measured pulse electric field time-domain waveforms.
• Accurate waveform measurement is essential for reliable data interpretation.

Purpose of the Study:

• To propose and validate a time-domain waveform recovery method for distorted sensor signals.
• To address the limitations of non-ideal low-frequency responses in optical waveguide sensors.
• To enhance the accuracy of electric field measurements using integrated sensors.

Main Methods:

• A system identification approach is employed for waveform recovery.
• The method is validated using step, lightning electromagnetic pulse, and square wave signals.
• Performance is evaluated using correlation coefficients, root mean square errors, and pulse width errors.

Main Results:

• High correlation coefficients (0.99) were achieved between input and recovered waveforms.
• Low root mean square errors (0.05-0.17) indicate high signal fidelity.
• Minimal pulse width errors (1-4%) demonstrate the method's precision.

Conclusions:

• The proposed system identification method effectively recovers distorted time-domain waveforms.
• The technique shows high adaptability and accuracy across various signal types.
• This method significantly improves the reliability of electric field measurements from optical waveguide sensors.