TY  - JOUR
T1  - Characteristic Temperature Relationship with Laser Cavity Length of Mid-IR Pbse/Pbsrse MQW Structure
AU - Khodr, Majed 
JO  - Journal of Engineering and Applied Sciences
VL  - 11
IS  - 1
SP  - 159
EP  - 161
PY  - 2016
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2016.159.161
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2016.159.161
KW  - Characteristic temperature
KW  -cavity length
KW  -quantum efficiency
KW  -PbSe
KW  -PbSrSe
AB  - The current research efforts are focused on development of practical mid-IR laser devices that can be used in high resolution spectrometers for sensitive detection of specific gas molecules. Improvements in processing and thermal management are expected to yield room temperature lasing in the near future. In this research, the effects of laser cavity length on a critical thermal operational parameter, the characteristic Temperature (T<SUB>0</SUB>) was studied was studied for this PbSe/Pb<SUB>0.934</SUB> Sr<SUB>0.066</SUB> Se mid-IR quantum well structure at three temperature ranges 77&lt;T&lt;150 K, 150&lt;T&lt;300 K and 77&lt;T&lt;300 K. It was noticed that T<SUB>0 </SUB>is high for short cavity lengths then decreases to an almost constant value after some critical length of 100 &#956;m. The effects of quantum efficiency were noticeable for short cavity lasers with a reduction of 55-62% in T<SUB>0</SUB> for the 77 K&le;T&le;150 K and 150 K&le;T&le;300 K and 68-73% for the 150 K&le;T&le;300 K range. However, as the cavity lengths increased above the critical value the effects are almost constant. The data were best fitted to a second degree polynomials which can be used to determine thecharacteristic temperature values as a function of cavity length.
ER  -