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LWIR and VLWIR detectors development at SOFRADIR for space applications

机译：SOFRADIR开发的LWIR和VLWIR探测器用于太空应用

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SOFRADIR is one of the leading companies involved in the development and manufacturing of infrared detectors. Its offer covers the infrared spectrum from visible range (0.4 μm) up to very long wavelength range (15 μm). The need in this last field is driven by space activities, especially by meteorological instruments using imagery or spectrometry.rnIn the frame of Meteosat Third Generation mission, ESA has launched pre-development activities to address the critical equipments for risk reduction. VLWIR detectors for FCI and IRS have been considered as challenging ones and thus SOFRADIR has been involved for manufacturing and testing 2D arrays with long cut-off wavelength (14.9μm at 50K) in order to evaluate their compliance to MTG requirements as far as dark current behaviour, quantum efficiency, photo-response uniformity, spatial response, operability and reliability are concerned.rnIn parallel, trends of space and tactical applications call for dark current reduction technology in order to improve systems performances in terms of operating temperature and signal to noise ratio. In the frame of its common laboratory DEFIR with CEA-LETI, Sofradir has developed a new MCT p on n technology to answer this need. First demonstrations were made with success (640x512, pitch 15μm and cut-off 9.5μm) and Sofradir is now industrializing this technology in particular for tactical application. Thanks to the communality between space and tactical activity at Sofradir, these results will benefit advantageously also to space activity.rnIn this paper, we present a review of latest Sofradir results concerning LWIR and VLWIR technology. In particular, latest data, concerning development and characterization of generic VLWIR technology up to 15 μrn cut-off wavelength, are presented as well as data concerning the promising p on n LWIR technology.
机译：SOFRADIR是从事红外探测器开发和制造的领先公司之一。它的产品涵盖从可见光范围（0.4μm）到非常长的波长范围（15μm）的红外光谱。这最后一个领域的需求是由太空活动推动的，尤其是利用影像或光谱技术的气象仪器。在Meteosat第三代任务的框架内，ESA开展了开发前活动，以解决降低风险的关键设备。用于FCI和IRS的VLWIR检测器被认为是具有挑战性的检测器，因此SOFRADIR已参与制造和测试具有长截止波长（在50K时为14.9μm）的2D阵列，以评估其在暗电流下对MTG要求的符合性。行为，量子效率，光响应均匀性，空间响应，可操作性和可靠性都受到关注。同时，空间和战术应用的趋势要求降低暗电流技术，以改善工作温度和信噪比方面的系统性能。 。在其带有CEA-LETI的普通实验室DEFIR的框架内，Sofradir开发了一种新的MCT p on n技术来满足这一需求。首次成功进行了演示（640x512，间距15μm，截断9.5μm），Sofradir现在正将该技术产业化，尤其是用于战术应用。由于空间与战术活动之间的共同性，这些结果也将有利于空间活动。在本文中，我们对有关LWIR和VLWIR技术的最新Sofradir结果进行了综述。特别是，提出了有关高达15μm截止波长的通用VLWIR技术的开发和表征的最新数据，以及有关有希望的n LWIR技术的数据。

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