Inert gas packaging of InGaAs detector with multistage thermoelectric cooler

De-feng Mo; Da-fu Liu; Li-yi Yang; Yang Wang; Tao Li; Xue Li

doi:10.1117/12.2505117

16 January 2019 Inert gas packaging of InGaAs detector with multistage thermoelectric cooler

De-feng Mo, Da-fu Liu, Li-yi Yang, Yang Wang, Tao Li, Xue Li

Proceedings Volume 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 108380W (2019) https://doi.org/10.1117/12.2505117
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Inert gas packaging and vacuum packaging are the main packaging method of photodetectors. A multi-stage thermoelectric cooler (TEC) is used to provide low temperature environment for extended wavelength InGaAs focal plane. A gas charging device is established to study nitrogen and krypton gas packaging. The performance of multi-stage TEC under different packaging atmospheres is tested, and the temperature field distribution is simulated by finite element analysis using FLoEFD software. The results show that in inflatable environment the cold side of TEC can achieve low temperature below 220K for the extended wavelength InGaAs detector. Gas conduction heat loss and gas convection heat loss are introduced into the inflatable packaging compared with vacuum packaging, and the relationship between temperature difference and input current under different packaging atmosphere is obtained. The cooling effect of TEC in krypton gas packaging is superior to that in nitrogen packaging, and the temperature of the cold platform can reach 211K and 215K respectively under the same input current of 4.5A. The results of FLOEFD finite element analysis are basically in agreement with the measured results, and the temperature uniformity of the focal plane is good. Because of without using the getter, Inert gas packaging is an economical packaging method for infrared detector.

Citation Download Citation

De-feng Mo, Da-fu Liu, Li-yi Yang, Yang Wang, Tao Li, and Xue Li "Inert gas packaging of InGaAs detector with multistage thermoelectric cooler", Proc. SPIE 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 108380W (16 January 2019); https://doi.org/10.1117/12.2505117

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KEYWORDS

Packaging

Krypton

Nitrogen

Indium gallium arsenide

Sensors

Thermoelectric materials

Convection

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