48AT-0-... Laser Attenuators are used for reproducible and precise reduction of the power output by the laser.
The collimated laser beam is constricted by a precision ball bearing transported by a scaled micrometer screw. The subsequent singlemode fiber coupling is used as a mode filter. This mechanically stable attenuation method allows the precise and reproducible setting of the laser power output over a wide range (typically 0.5 to >60 dB).
Compared with power regulation by modulation of the laser current, the wavelength and polarizationstatus of the laser beam are preserved.