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Modal loss mechanism of micro-structured VCSELs studied using full vector FDTD method.
Du-Ho Jo1, Ngoc Hai Vu, Jin-Tae Kim
1Department of Physics, Chonnam National University, Gwangju, South Korea.
Optics Express
|September 22, 2011
Summary
This study analyzes modal properties and loss mechanisms in vertical cavity surface-emitting lasers (VCSELs) using FDTD simulations. It proposes a method to optimize microstructure for high-power, single-mode VCSELs.
Area of Science:
- Optics and Photonics
- Semiconductor Devices
- Computational Electromagnetics
Background:
- Vertical cavity surface-emitting lasers (VCSELs) are crucial for optical communication and sensing.
- Understanding modal properties and loss mechanisms is key to improving VCSEL performance.
- Holey structures offer potential for enhanced VCSEL design but require detailed analysis.
Purpose of the Study:
- To investigate the modal properties of VCSELs incorporating holey structures.
- To analyze the impact of structural parameter variations on laser loss.
- To develop an effective method for estimating modal loss in VCSELs.
Main Methods:
- Utilized the finite difference time domain (FDTD) method for accurate electromagnetic simulation.
- Varied structural parameters of holey VCSELs to study loss behavior.
- Developed a technique to estimate modal loss from FDTD-derived mode profiles.
Main Results:
- Identified key loss mechanisms in holey VCSELs.
- Established relationships between structural parameters and modal loss.
- Demonstrated an effective method for modal loss estimation.
Conclusions:
- The study provides insights into the loss mechanisms of VCSELs with holey structures.
- The proposed modal loss estimation method offers a valuable tool for VCSEL design.
- Results offer guidelines for optimizing microstructures to achieve high-power, single-mode VCSELs.
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