The AQ6150B from Yokogawa Test & Measurement Corporation is a Optical Wavelength Meter with Wavelength Range 900 to 1700 nm, Measurement Time 0.2 s, less (update rate: Fast), 0.3 s, less (update rate: Normal), Wavelength Accuracy ±0.7 to ±1.5 ppm((±1 pm to ±2.3 pm), Input Power -40 to 18 dBm, Wavelength Resolution 0.0001 nm. More details for AQ6150B can be seen below.
