Related Experiment Video
Updated: Jun 19, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Synthesis of ideal window filter response in grating-assisted couplers
Optics Letters
|October 31, 2009
Summary
Researchers designed grating-assisted couplers with optimized spectral responses. This method achieves high power transfer efficiency and suppressed sidelobes for ideal optical filtering applications.
Area of Science:
- Optics and Photonics
- Waveguide Devices
- Grating Couplers
Background:
- Codirectional grating-assisted couplers are crucial for optical signal processing.
- Achieving ideal windowlike spectral response with high efficiency and low sidelobes remains a challenge.
Purpose of the Study:
- To synthesize ideal windowlike spectral response in codirectional grating-assisted couplers.
- To theoretically design couplers with near 100% power transfer efficiency and suppressed sidelobes.
Main Methods:
- Variational optimization method applied for theoretical design.
- Analysis of pi-phase-reversal sections for passband flattening.
Main Results:
- Near 100% power transfer efficiency achieved over the passband.
- Sidelobes suppressed to -40 dB.
- Demonstrated effectiveness of pi-phase-reversal sections for passband flattening.
Conclusions:
- The variational optimization method enables the design of high-performance grating-assisted couplers.
- The synthesized couplers exhibit ideal spectral characteristics for optical applications.
- Understanding the role of phase-reversal sections is key to controlling spectral flatness.
