The Hawaii-4RG near-infrared detectors offer several output configurations in which the detectors can be interfaced with the European Southern Observatory cryogenic preamplifiers. The buffered mode of output operation has the advantages of higher speed and lower electrical crosstalk between the outputs, reduced unit cell current, etc. One of the effects of the buffered mode operation is increased glow at the bottom of the array due to the operation of the output buffers compared to the unbuffered mode. The excess glow can be a limiting source to achieve low noise in long integrations using the up-the-ramp sampling readout mode. The glow can be significantly reduced by optimally biasing the output buffer stages. This work presents the output buffer glow issue, its quantification in terms of glow per read, glow per unit integration time, its dependency on pixel speed, and its mitigation by optimization of buffered mode operation.

中文翻译：

---

H4RG-15 探测器中的输出缓冲器辉光及其缓解


Hawaii-4RG 近红外探测器提供多种输出配置，其中探测器可以与欧洲南方天文台低温前置放大器连接。输出操作的缓冲模式具有速度更高、输出之间的电串扰更低、单位单元电流减小等优点。缓冲模式操作的效果之一是由于以下操作而增加了阵列底部的辉光：与无缓冲模式相比，输出缓冲。多余的辉光可能是使用斜坡上采样读出模式在长积分中实现低噪声的限制源。通过对输出缓冲级进行最佳偏置，可以显着减少辉光。这项工作提出了输出缓冲区辉光问题、其在每次读取辉光、每单位积分时间辉光方面的量化、其对像素速度的依赖性以及通过优化缓冲模式操作来缓解问题。