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Two-dimensional VLWIR arrays for Meteosat 3rd generation

机译：Meteosat第三代的二维VLWIR阵列

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摘要

The mission success of the geostationary operational satellite system Meteosat Third Generation (MTG) will significantly depend on the instrument performance in the very long wavelength infrared (VLWIR) spectral range. As far as dark current behavior, homogeneity, and operability are concerned, the VLWIR constitutes a major challenge for sensor material improvement and device development. This paper reports on the latest results on HgCdTe (MCT) VLWIR photovoltaic sensor development and characterization for possible use with MTG.rnIn order to achieve low enough dark currents, extrinsically p-doped MCT material with various cut-off wavelengths in the long wavelength infrared (LWIR)/VLWIR has been developed and manufactured. Compared to standard intrinsic MCT, a reduction in dark current by more than an order of magnitude is achieved, meeting the challenging MTG requirements.rnIn a (256×256) VLWIR MCT focal plane array (FPA) with an ～14.7μm cut-off wavelength at a 55K operating temperature, a dark current density of about 1 pA/μm~2 is demonstrated. For a 291K reference scene and at half-well integration capacity, we obtain a noise equivalent temperature difference of (24.0±3.0)mK and a photo response of 13mV/K.
机译：对地静止业务卫星系统Meteosat第三代（MTG）的任务成功将在很大程度上取决于仪器在超长波长红外（VLWIR）光谱范围内的性能。就暗电流行为，均匀性和可操作性而言，VLWIR构成了传感器材料改进和设备开发的主要挑战。本文报告了有关HgCdTe（MCT）VLWIR光伏传感器开发和表征的最新结果，并可能与MTG一起使用。为了获得足够低的暗电流，外加p掺杂的MCT材料在长波长红外中具有各种截止波长（LWIR）/ VLWIR已开发和制造。与标准本征MCT相比，暗电流减少了一个数量级以上，满足了极具挑战性的MTG要求.rn在（256×256）VLWIR MCT焦平面阵列（FPA）中，截止点约为14.7μm在55K的工作温度下，其暗电流密度约为1 pA /μm〜2。对于291K参考场景和半阱集成容量，我们获得的噪声等效温度差为（24.0±3.0）mK，光响应为13mV / K。

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