Optical power and energy meters

PM300E, Dual-Channel Benchtop Power and Energy Meter, Thorlabs

Programmable Channels: Monitor, Difference, Ratio, Math Functions,Linear and Log Values, Attenuation
USB 2.0 Interface and Software Suite
Large Graphics Display
Compatible Sensors: S100 (Photodiode), S200 (Thermal) Power Meter Sensors, and Common Photodiodes
Programmable Responsivity for Connection of Photodiodes and Thermal Sensors
Analog Display Simulator
Continuous and Single-Shot Energy Measurement of Pulsed Laser Sources
Adjustable Trigger Threshold, Beam Diameter, and Wavelength
Display of Energy in J and J/cm 2 , Average Power in W and W/cm 2, Repetition Rate in Hz
Externally Triggered Power and Energy Measurements