The Keysight N7781C is a compact high-speed polarization analyzer capable of comprehensive analysis of the polarization characteristics of optical signals, including the polarization state (SOP) represented by the Poincare sphere (Stokes parameter). Its built-in algorithms and calibration data ensure highly accurate measurements over a wide wavelength range.

With a real-time measurement capability of 1 MSa/s, the instrument is ideal for analyzing disturbed and fluctuating signals, as well as control applications that require real-time feedback of polarization information, such as digital control loops in automated manufacturing test systems. The N7781C is ideal for applications with high polarization measurement and control requirements.