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Keysight N7786B 偏振综合仪包含一个以铌酸锂为基础的高速偏振控制器和一个偏振分析仪,以及一个基于微控制器的驱动电路。
它可以在各种模式中进行工作:
作为偏振稳定器,即使是在输入 SOP 发生波动和漂移的情况下,也可提供稳定的输出偏振状态(SOP)。 标准的单模光纤(SMF)可以引导稳定的输出信号。 输出 SOP 能够通过以下方式来定义:
设置后不管(Set-and-forget): 按下前面板按钮后,即使仪器输入出现偏振变化,当前的 SOP 仍会存储并保持。 定义的斯托克斯(Defined Stokes)参数: 用户可以使用斯托克斯参数来定义目标输出 SOP 作为同步扰码器,它通过(伪)随机方法转换输出信号的 SOP,其循环速度可达 100 KSOPs/s。
SOP 的转换仅为几微秒。 电子触发输入可用来使扰码器和外部事件保持同步。
作为 SOP 转换器,Keysight N7786B 通过速度大于 40 KHz 的 SOP 序列进行循环,这与小于 25 微秒的循环时间相对应。 用户可以使用斯托克斯系数轻松定义 SOP 序列。
它可在几毫秒内达到庞加莱球的完整范围。