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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Wide spectral bandwidth electro-absorption modulator using coupled micro-cavity with asymmetric tandem quantum well
Byung Hoon Na1, Gun Wu Ju, Hee Ju Choi
1School of Information and Mechatronics, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, South Korea.
Optics Express
|October 6, 2012
Summary
We developed a novel electro-absorption modulator (EAM) using coupled Fabry-Perot cavities with micro-cavity (CCMC) and asymmetric tandem quantum wells (ATQWs) for advanced 3D imaging systems.
Area of Science:
- Optoelectronics
- Materials Science
- 3D Imaging Systems
Background:
- Reliable 3D imaging requires optical shutters with wide spectral bandwidth and high modulation depth.
- Existing optical shutters face limitations in achieving both wide spectral operation and enhanced modulation depth simultaneously.
Purpose of the Study:
- To propose and investigate a novel electro-absorption modulator (EAM) design for improved optical shutter performance.
- To enhance spectral bandwidth and modulation depth for 3D imaging applications.
Main Methods:
- Design and simulation of an EAM based on coupled Fabry-Perot cavities with micro-cavity (CCMC).
- Integration of asymmetric tandem quantum wells (ATQWs) within the CCMC structure.
- Investigation of various modulator geometries to optimize performance.
Main Results:
- The proposed CCMC structure with ATQWs achieved a wide spectral bandwidth of 9.6nm.
- A high modulation depth exceeding 50% at -24V was obtained.
- Experimental results showed good agreement with theoretical calculations.
Conclusions:
- The developed EAM demonstrates excellent potential as an optical shutter for 3D imaging.
- The CCMC structure with ATQWs offers a significant improvement in spectral bandwidth and modulation depth.
- This technology paves the way for more reliable and advanced 3D imaging systems.
