In the RF world, attenuators are a useful test and measurement tool. Variable units that can apply different levels of attenuation in discrete steps are even better. [DuWayne] made a 63 dB step ...

Manufacturers of Passive Devices for High Power Laser Applications. These are In Line Power Monitor, Isolator, Depolarizer, Polarizer, 3 and 4 Port Circulator, Variable Optical Attenuator. PM ...