Improving the Thermal Characteristics of Semiconductor Lasers Using a New Asymmetric Waveguide Structure
نویسندگان
چکیده مقاله:
Self-heating leads to a temperature rise of the laser diode and limits the output power and efficiency due to increased loss and decreased differential gain. To control device self-heating, it is required to design the laser structure with a low optical loss, while the heat flux must spread out of the device efficiently. In this study, a new asymmetric waveguide design is proposed and the thermal performance of the laser with this new design is theoretically analyzed and compared with conventional symmetric waveguide laser. For this purpose, the simulation PICS3D software is used, which self-consistently combines 3D simulation of carrier transport, self-heating, and optical wave-guiding. According to the numerical simulation results, when the asymmetric waveguide is used the semiconductor laser shows a higher output light power and slope efficiency. The results show that Joule heating decreases and recombination heat increases, but heat dissipation occurs more effectively due to increased cooling densities. Overall, the maximum laser operation temperature decreases, confirming that our new asymmetric waveguide structure improves laser thermal characteristics.
منابع مشابه
Using of Broadened Asymmetric Waveguide Structure for 980nm Diode Laser
Laser diode beam divergence is the main parameter for beam shaping and fiber optic coupling. Increasing the waveguide layer thickness is the conventional method to decrease the beam divergence. In this paper, the broadened asymmetric waveguide is introduced to decrease the divergence without increasing the optical power. The asymmetric waveguide was used to shift the vertical optical field to n...
متن کاملThreshold characteristics of semiconductor microdisk lasers
Whispering-gallery mode microdisk lasers using optical’ and electrical2 excitation have recently been demonstrated. The initial experiments* and results described here use continuous-wave optical excitation at liquid-nitrogen temperatures. The threshold characteristics of these microlasers are studied here as the small volume limit is approached where there is a single optical mode within the g...
متن کاملDesign of a new asymmetric waveguide in InP-Based multi-quantum well laser
Today, electron leakage in InP-based separate confinement laser diode has a serious effect on device performance. Control of electron leakage current is the aim of many studies in semiconductor laser industry. In this study, for the first time, a new asymmetric waveguide structure with n-interlayer for a 1.325 μm InP-based laser diode with InGaAsP multi-quantum well is proposed and theoreticall...
متن کاملWaveguide grating mirror for large-area semiconductor lasers.
We have fabricated and tested a waveguide grating mirror that uses anomalous reflection of light associated with excitation of waveguide modes. Sharp features are observed in the reflection spectra in both the wavelength and the angular domains. We confirm experimentally that, when the waveguide grating mirror is placed a short distance in front of a large-area semiconductor laser, it can contr...
متن کاملImproving Blue InGaN Laser Diodes Performance with Waveguide Structure Engineering
To enhance lasers’ power and improve their performance, a model wasapplied for the waveguide design of 400 nm InGaN/InGaN semiconductor laser, whichis much easier to implement. The conventional and new laser structures weretheoretically investigated using simulation software PICS3D, which self-consistentlycombines 3D simulation of carrier transport, self-heating, and opt...
متن کاملThermoreflectance spectroscopy—Analysis of thermal processes in semiconductor lasers
This review focuses on theoretical foundations, experimental implementation and an overview of experimental results of the thermoreflectance spectroscopy as a powerful technique for temperature monitoring and analysis of thermal processes in semiconductor lasers. This is an optical, non-contact, high spatial resolution technique providing high temperature resolution and mapping capabilities. Th...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ذخیره در منابع من قبلا به منابع من ذحیره شده{@ msg_add @}
عنوان ژورنال
دوره 15 شماره 1
صفحات 55- 64
تاریخ انتشار 2019-03-01
با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023