For example: Agilent E4440A or Anritsu 68369
Keysight / Agilent Fiber Optics
Keysight / Agilent 8166B
Agilent 8166B Lightwave Multichannel System
Manufacturer: Keysight / Agilent
Keysight / Agilent 81960A
Agilent 81960A Fast Swept Compact Tunable Laser Source, 1505nm to 1630nm
Manufacturer: Keysight / Agilent
Keysight / Agilent 83487A
83487A 3 GHz optical / 20 GHz electrical module
Manufacturer: Keysight / Agilent
Keysight / Agilent 86142B
86142B High Performance Optical Spectrum Analyzer
Manufacturer: Keysight / Agilent
Keysight / Agilent Agilent 8156A-101 Optical Attenuator
Optical attenuator straight
Manufacturer: Keysight / Agilent