• The central element of the SANOS is a resonant saturable absorber mirror (RSAM) with zero reflectance for a low power signal at the resonance wavelength.
• The RSAM is a nonlinear optical device, having a low reflectance for week optical signals like noise and a high reflectance for high power signals like optical pulses.
• Free space SANOS: Combination of RSAM with a 100 % mirror to use the RSAM nonlinearity and ensure an output in the same direction as the input. Please see: FS-SANOS.
• Fiber coupled SANOS: The RSAM is mounted on the second port of a three port circulator. Please see: FC-SANOS .

SANOS applications

• Optical noise suppression, for example after an amplifier or pulse picker.
• Note: Noise suppression is only possible at the resonance wavelength.