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Design of monolithically integrated vertical cavity laser with depleted optical thyristor for optical programmable
Woon-Kyung Choi1, Young-Wan Choi
1Microwave and Lightwave Telecommunications Lab, Chung-Ang University, Dongjak, Seoul, Korea.
Optics Express
|October 30, 2008
Summary
Researchers developed optical logic gates using vertical cavity laser--depleted optical thyristors (VCL-DOTs). These devices enable optically programmable gate arrays, demonstrating AND, OR, and other logic functions with high sensitivity and low threshold current.
Area of Science:
- Optoelectronics
- Photonics
- Integrated Optics
Background:
- Depleted optical thyristors are crucial for optical computing.
- Vertical cavity lasers offer efficient light emission.
- Integration of these components is key for advanced optical circuits.
Purpose of the Study:
- To theoretically analyze and experimentally demonstrate optical logic gates.
- To implement these gates using monolithically integrated vertical cavity laser--depleted optical thyristors (VCL-DOTs).
- To achieve an optically programmable gate array.
Main Methods:
- Theoretical analysis of the depleted optical thyristor structure.
- Experimental demonstration of optical AND and OR gates using single VCL-DOTs.
- Implementation of various optical logic functions using differential VCL-DOTs with adjustable reference beam intensity.
- Device design utilizing selective oxidation for a small active lasing region and wide detecting area.
Main Results:
- Successful realization of optical AND and OR gates by varying input bias.
- Demonstration of diverse optical logic functions through reference beam intensity adjustment.
- Achieved high sensitivity and low threshold current in VCL-DOT devices.
- Monolithic integration of VCL-DOTs for optically programmable gate arrays.
Conclusions:
- VCL-DOTs are effective for implementing optical logic gates.
- The proposed design enables optically programmable gate arrays.
- The integrated devices exhibit promising performance characteristics for future optical computing applications.
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