为了降低探测器的噪声与暗电流，使光谱仪的CMOS探测器能获得更准确的光谱曲线，设计了探测器温度控制系统。本系统核心采用基于现场可编程逻辑门阵列（FPGA）的增量式比例-积分-微分（PID）控制算法。在传统控制算法的基础上，增加了抗积分饱和控制，并且在PID算法的前端增加了对目标值的过渡过程。该系统在实现探测器温度变化速率可控的同时，也解决了超调过大的问题。多次整机环境实验结果表明：在轨环境温度条件下，40 °C温差范围内该系统可以控制探测器以指定温变速率（4.5±0.05） °C/min达到任意温度；并且可在该温度下稳定工作；温度变化范围为±0.1 °C。相比于传统模拟PID控制方法，其具有灵活度高，稳定性强等优点。当制冷到−10 °C时，探测器的噪声得到了有效抑制。

基于高重频超宽带脉冲，研究了高重频超宽带脉冲对自适应调零天线和PIN限幅器的抗干扰性能的影响。基于Matlab和ADS仿真软件搭建模型，并通过实验平台对ADS的仿真结果进行验证。实验结果表明：对于导航接收机中的自适应调零天线，超宽带干扰脉冲会使其射频链路产生饱和效应，从而使功率倒置算法失效，进而无法在干扰方向形成零陷；对于PIN限幅器，超宽带干扰脉冲可以使其产生明显的尖峰泄露效应。相较于ns量级的窄谱高功率微波脉冲，超宽带脉冲对限幅器的干扰能力更强。

The dynamic gain of a few-mode erbium-doped fiber amplifier (FM-EDFA) is vital for the long-haul mode division multiplexing (MDM) transmission. Here, we investigate the mode-dependent dynamic gain of an FM-EDFA under various manipulations of the pump mode. First, we numerically calculate the gain variation with respect to the input signal power, where a mode-dependent saturation input power occurs under different pump modes. Even under the fixed intensity profile of the pump laser, the saturation input power of each spatial mode is different. Moreover, high-order mode pumping leads to a compression of the linear amplification region, even though it is beneficial for the mitigation of the differential modal gain (DMG) arising in all guided modes. Then, we develop an all-fiber 3-mode EDFA, where the fundamental mode of the pump laser can be efficiently converted to the LP₁₁ mode using the all-fiber mode-selective coupler (MSC). In comparison with the traditional LP₀₁ pumping scheme, the DMG at 1550 nm can be mitigated from 1.61 dB to 0.97 dB under the LP₁₁ mode pumping, while both an average gain of 19.93 dB and a DMG of less than 1 dB can be achieved from 1530 nm to 1560 nm. However, the corresponding signal input saturation powers are reduced by 0.3 dB for the LP₀₁ mode and 1.6 dB for the LP₁₁ mode, respectively. Both theoretical and experimental results indicate that a trade-off occurs between the DMG mitigation and the extension of the linear amplification range when the intensity profile of pump laser is manipulated.

近红外光探测能力强的光电探测器更有利于检测人体心率，而且探测范围覆盖红光与近红外光的宽带响应光电探测器能用于检测血氧饱和度，因此提升宽带响应光电探测器的红光与近红外光探测能力具有重要意义。然而，经典的二元体异质结宽带响应倍增型有机光电探测器通常由于活性层中给体/受体比例差异较大，导致器件对红光与近红外光的响应能力较弱甚至没有响应。本文通过用少量给体材料PCE10替代活性层P3HT∶IEICO?4F（100∶1）中部分P3HT的方法，制备了结构为ITO/PEDOT∶PSS/P3HT∶PCE10∶IEICO?4F（90∶10∶1）/Al的体异质结三元倍增型有机光电探测器。-20 V偏压下，三元器件获得紫外到近红外（330~810 nm）响应较均匀的EQE光谱，并且器件在660 nm和810 nm处的EQEs（134000%和147000%）是相同条件下二元器件的78倍和106倍，相应的探测灵敏度（5.4×10¹³ Jones和7.27×10¹³ Jones）分别提升了26倍和36倍。三元器件的红光和近红外光探测能力得到显著提升，为制备用于人体心率与血氧饱和度检测的高性能光电探测器提供了策略。