简介：
Overview
This article describes the operation of a silicon nitride (SiN) integrated photonic circuit featuring optical phased arrays. These circuits are designed to emit low divergence laser beams in the near infrared and enable two-dimensional beam steering.
Key Study Components
Area of Science
- Integrated photonics
- Optical phased arrays
- Beam steering technology
Background
- Photonic integrated circuits are essential for advanced optical applications.
- Characterization methods need to be fast and automated for wafer-scale evaluation.
- Standard equipment in the micro-electronics industry can be adapted for this purpose.
- Minimizing noise and instabilities is crucial for accurate measurements.
Purpose of Study
- To develop a characterization protocol for beam-steering circuits.
- To demonstrate the procedure using a standard prober station.
- To optimize the output beam's intensity and divergence.
Methods Used
- Using a light microscope for fiber alignment on the wafer.
- Adjusting polarization to maximize light intensity at output gratings.
- Employing far field imaging to visualize output beams.
- Utilizing a multichannel electric probe for phase control connections.
Main Results
- Successful demonstration of beam steering in two dimensions.
- Optimization of output beam intensity through phase adjustments.
- Characterization of steering range and beam divergence achieved.
- Integration of calibrated circuits with LIDAR systems for imaging.
Conclusions
- The developed protocol enables efficient evaluation of photonic circuits.
- Elimination of instabilities is essential for accurate calibration.
- Results contribute to advancements in optical communication technologies.
What is the significance of optical phased arrays?
Optical phased arrays allow for precise control of laser beam direction and shape, enhancing applications in imaging and communication.
How does the characterization method improve circuit evaluation?
The method provides a fast, automated way to assess circuit performance at the wafer scale, crucial for large-scale production.
What challenges are addressed in this study?
The study addresses noise suppression and stability during the calibration of optical phased arrays to ensure accurate measurements.
Can this technology be integrated with existing systems?
Yes, the calibrated circuits can be integrated with LIDAR systems for enhanced imaging capabilities.
What role does the multichannel probe play in the process?
The multichannel probe allows simultaneous electrical connections, facilitating efficient phase control for beam steering.
What are the main figures of merit for optical phased arrays?
The main figures of merit include steering range and beam divergence, which are critical for performance evaluation.
繁體中文
