Yokogawa Test & Measurement Corporation released an upgraded optical spectrum analyzer equipped with features that enhance performance and improve usability. The instrument (AQ6370E) can be used to characterize a wide range of components, including lasers for optical communications, optical transceivers, and optical amplifiers.
One of these new features is HCDR (high close-in dynamic range) mode, with which a user can measure a single longitudinal mode laser with a high close-in dynamic range. Close-in dynamic range is a key performance criterion when developing lasers and optical devices.
There is also a SMSR (side mode suppression ratio) mode, which can reduce SMSR measurement time, and an APP mode.
Source: Yokogawa
