For example: Agilent E4440A or Anritsu 68369
Tunable Lasers
Keysight / Agilent 81554SM
Agilent 81554SM Laser Source Module 1310/1550nm
Manufacturer: Keysight / Agilent
Keysight / Agilent 81576A
81576A Variable Optical Attenuator Modules with Power Control and Straight Interface
Manufacturer: Keysight / Agilent