The OSA202C from Thorlabs Inc is a Optical Spectrum Analyzer with Wavelength Range 600 to 1700 nm, Wavelength Resolution Spectral Resolution: 7.5 GHz (0.25 cm-1), Wavelength Accuracy Spectral Accuracy: ±2 ppmf, Dynamic Range Optical Rejection Ratio: 30 dB, Optical Power Range 10 mW (10 dBm). More details for OSA202C can be seen below.