Maximum heat-sink temperature for CW operation of a double-heterostructure semiconductor injection laser

1989 ◽  
Vol 25 (10) ◽  
pp. 2079-2083 ◽  
Author(s):  
H.C. Hsieh
Keyword(s):  
Heat Sink ◽  
Injection Laser ◽  
Maximum Heat ◽  
Double Heterostructure ◽  
Cw Operation ◽  
Semiconductor Injection Laser ◽  
Heat Sink Temperature

scholarly journals Effect of liquid cooling on PCR performance with the parametric study of cross-section shapes of microchannels

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yousef Alihosseini ◽  
Mohammad Reza Azaddel ◽  
Sahel Moslemi ◽  
Mehdi Mohammadi ◽  
Ali Pormohammad ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Heat Sink ◽  
Evaluation Criteria ◽  
Circular Cross Section ◽  
Microchannel Heat Sink ◽  
Liquid Cooling ◽  
Maximum Heat ◽  
Maximum Heat Transfer

AbstractIn recent years, PCR-based methods as a rapid and high accurate technique in the industry and medical fields have been expanded rapidly. Where we are faced with the COVID-19 pandemic, the necessity of a rapid diagnosis has felt more than ever. In the current interdisciplinary study, we have proposed, developed, and characterized a state-of-the-art liquid cooling design to accelerate the PCR procedure. A numerical simulation approach is utilized to evaluate 15 different cross-sections of the microchannel heat sink and select the best shape to achieve this goal. Also, crucial heat sink parameters are characterized, e.g., heat transfer coefficient, pressure drop, performance evaluation criteria, and fluid flow. The achieved result showed that the circular cross-section is the most efficient shape for the microchannel heat sink, which has a maximum heat transfer enhancement of 25% compared to the square shape at the Reynolds number of 1150. In the next phase of the study, the circular cross-section microchannel is located below the PCR device to evaluate the cooling rate of the PCR. Also, the results demonstrate that it takes 16.5 s to cool saliva samples in the PCR well, which saves up to 157.5 s for the whole amplification procedure compared to the conventional air fans. Another advantage of using the microchannel heat sink is that it takes up a little space compared to other common cooling methods.

Spectroscopy within the Doppler profile of potassiumDlines using an external-resonator semiconductor injection laser

1980 ◽  
Vol 10 (10) ◽  
pp. 1244-1247 ◽  
Author(s):  
V L Velichanskiĭ ◽  
A S Zibrov ◽  
V S Kargopol'tsev ◽  
O R Kachurin ◽  
V V Nikitin ◽  
...  
Keyword(s):  
Injection Laser ◽  
External Resonator ◽  
Doppler Profile ◽  
Semiconductor Injection Laser

Thermal Performance Improvement of a Heat Sink With Piezoelectric Vibrating Fins

2010 ◽  
Author(s):  
Hee Seung Park ◽  
Sung Jin Kim
Keyword(s):  
Natural Frequency ◽  
Performance Improvement ◽  
Thermal Performance ◽  
Vibration Frequency ◽  
Heat Sink ◽  
Vibration Amplitude ◽  
Piezoelectric Actuators ◽  
Convection Heat ◽  
Heat Transfer Characteristics ◽  
Heat Sink Temperature

A heat sink with piezoelectric vibrating fins is developed through attaching piezoelectric actuators to the fins of a heat sink, and the heat transfer characteristics of the heat sink are experimentally investigated. Thermal performance improvement of the heat sink by the vibration of the fins is observed compared to the thermal performance of a natural convection heat sink with static fins under a fixed heat sink geometry condition. The thermal performance of the heat sink changes as the vibration amplitude of the fins or the vibration frequency of the fins changes. Particularly, if the vibration frequency of the fins matches up to the natural frequency of the fins, the vibration amplitude is significantly increased by resonance and the thermal performance also increases. The natural frequency of the fins changes with the heat sink temperature because the geometry of the fins changes and the properties of the fins change due to the temperature change.

Stable CW operation of 1.3 µm double-heterostructure laser heteroepitaxially grown on Si

1995 ◽  
Vol 31 (6) ◽  
pp. 455-457 ◽  
Author(s):  
T. Yamada ◽  
H. Mori ◽  
M. Tachikawa ◽  
Y. Kadota ◽  
T. Sasaki ◽  
...  
Keyword(s):  
Double Heterostructure ◽  
Cw Operation ◽  
Heterostructure Laser
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