You are here
Thermal and Waveguide Optimization of Broad Area Quantum Cascade Laser Performance
- Date Issued:
- 2017
- Abstract/Description:
- Quantum Cascade Lasers are a novel source of coherent infrared light, unique in their tunability over the mid-infrared and terahertz range of frequencies. Advances in bandgap engineering and semiconductor processing techniques in recent years have led to the development of highly efficient quantum cascade lasers capable of room temperature operation. Recent work has demonstrated power scaling with broad area quantum cascade lasers by increasing active region width beyond the standard ~10 ?m. Taking into account thermal effects caused by driving a device with electrical power, an experimentally fitted model is developed to predict the optical power output in both pulsed and continuous operation with varying device geometry and minor changes to quantum cascade laser active region design. The effects of the characteristic temperatures of threshold current density and slope efficiency, active region geometry, and doping, on output power are studied in the model. The model is then used to refine the active region design for increased power out in continuous operation for a broad area design. Upon testing the new design, new thermal effects on rollover current density are observed. The model is then refined to reflect the new findings and more accurately predict output power characteristics.
Title: | Thermal and Waveguide Optimization of Broad Area Quantum Cascade Laser Performance. |
30 views
12 downloads |
---|---|---|
Name(s): |
Suttinger, Matthew, Author Lyakh, Arkadiy, Committee Chair Bass, Michael, Committee Member Vodopyanov, Konstantin, Committee Member University of Central Florida, Degree Grantor |
|
Type of Resource: | text | |
Date Issued: | 2017 | |
Publisher: | University of Central Florida | |
Language(s): | English | |
Abstract/Description: | Quantum Cascade Lasers are a novel source of coherent infrared light, unique in their tunability over the mid-infrared and terahertz range of frequencies. Advances in bandgap engineering and semiconductor processing techniques in recent years have led to the development of highly efficient quantum cascade lasers capable of room temperature operation. Recent work has demonstrated power scaling with broad area quantum cascade lasers by increasing active region width beyond the standard ~10 ?m. Taking into account thermal effects caused by driving a device with electrical power, an experimentally fitted model is developed to predict the optical power output in both pulsed and continuous operation with varying device geometry and minor changes to quantum cascade laser active region design. The effects of the characteristic temperatures of threshold current density and slope efficiency, active region geometry, and doping, on output power are studied in the model. The model is then used to refine the active region design for increased power out in continuous operation for a broad area design. Upon testing the new design, new thermal effects on rollover current density are observed. The model is then refined to reflect the new findings and more accurately predict output power characteristics. | |
Identifier: | CFE0007296 (IID), ucf:52174 (fedora) | |
Note(s): |
2017-12-01 M.S. Optics and Photonics, Optics and Photonics Masters This record was generated from author submitted information. |
|
Subject(s): | Quantum Cascade Laser -- QCL -- Thermal -- Waveguide -- Optoelectronic -- Semiconductor | |
Persistent Link to This Record: | http://purl.flvc.org/ucf/fd/CFE0007296 | |
Restrictions on Access: | campus 2019-06-15 | |
Host Institution: | UCF |