概要（Overview）

The Keysight 81635A dual optical power sensor provides precise measurements with low polarization dependence and power uncertainty, covering a wide wavelength and power range. It features low-noise dual InGaAs detectors, fits into Keysight's Lightwave mainframes, and supports single or multichannel configurations. Its capabilities include quick data logging and advanced spectral measurements, suitable for standard single-mode and multi-mode fibers.