The characteristics of high-power broad-area laser diodes with the improved heat sinking structure are numerically analyzed by a technology computer-aided design based self-consistent electro-thermal-optical simulation. The high-power laser diodes consist of a separate confinement heterostructure of a compressively strained InGaAsP quantum well and GaInP optical cavity layers, and a 100-μm-wide rib and a 2000-μm long cavity. In order to overcome the performance deteriorations of high-power laser diodes caused by self-heating such as thermal rollover and thermal blooming, we propose the high-power broad-area laser diode with improved heat-sinking structure, which another effective heat-sinking path toward the substrate side is added by removing a bulk substrate. It is possible to obtain by removing a 400-μm-thick GaAs substrate with an AlAs sacrificial layer utilizing well-known epitaxial liftoff techniques. In this study, we present the performance improvement of the high-power laser diode with the heat-sinking structure by suppressing thermal effects. It is found that the lateral far-field angle as well as quantum well temperature is expected to be improved by the proposed heat-sinking structure which is required for high beam quality and optical output power, respectively.
|Title of host publication||High-Power Diode Laser Technology XVI|
|Editors||Mark S. Zediker|
|Publication status||Published - 2018|
|Event||High-Power Diode Laser Technology XVI 2018 - San Francisco, United States|
Duration: 2018 Jan 29 → 2018 Jan 30
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Conference||High-Power Diode Laser Technology XVI 2018|
|Period||18/1/29 → 18/1/30|
Bibliographical noteFunding Information:
This work was supported by the Research Fund of High Efficiency Laser Laboratory of Agency for Defense Development of Korea (No.UD160069BD).
© 2018 SPIE.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering