Precision High Speed Optical Attenuator

SKU: PNSA

The Precision High-Speed Optical Attenuator maintains a constant attenuation or output power, regardless of the environmental fluctuations. The attenuation level can be varied at a fast speed. This is achieved by integrating two tap detectors at the fiber input and output of a NanoSpeed™ attenuator and controlling the ratio or output power using a feedback closed-loop circuit. The device has about 20dB dynamic control range in which the corresponding optical power range is preset. The control input can be 0~5 V or through USB/GUI. The attenuation is proportional to the 0-5V control signal which is input via a SMA connector. The USB input is micro-USB. Because of the control loop, the response speed is reduced, in which power control is much faster than attenuation. Wavelength below 800nm requires special crystals that is more expensive.
USB control reduces the response to 1ms due to computer CPU.
The module can also compensate slow polarization-dependent loss changes and fast optical power surges since the tap detectors will sense these changes. The non-mechanical device has passed the most stringent mil-spec and space flight qualifications and is designed for over 20 years of continuous operation. The module comes with a wall-plug 12V power supply.