User Guide

Liquid Crystal Noise Eater Chapter 6: Specifications
Page 12 CTN017430-D02
b. The maximum of the frequency range is defined as the point where 0 dB noise attenuation is
obtained. These noise eaters are designed to operate down to DC frequency. However, due
to external factors (e.g. ambient temperature, vibration, spatial and/or polarization stability of
the light source), the noise attenuation factor below 10 Hz is difficult to measure and
quantify. Therefore our specifications are guaranteed at 10 Hz and above.
c. Noise attenuation factor is the ratio of noise amplitude before and after the noise eater.
Tested at 3 mW input power with a noise amplitude of 5% of the input signal. See detailed
noise attenuation plots at thorlabs.com for more information
d. This is the range of output power adjustment where the noise attenuation factor is
guaranteed for a given input power level. If the output power is further reduced, the noise
eater might not be able to completely reduce the noise in the signal. This specification does
not include losses due to absorption.
e. The maximum input power and laser damage threshold are wavelength-independent.
Additionally, the absolute maximum input power varies with wavelength. See Section 5.2 for
details.
f. Specified for a 1/e
2
beam diameter.
g. Extinction ratio is the ratio of the signal power at minimum attenuation to the signal power at
full attenuation, regardless of the effective noise attenuation factor, when using the SMA
modulation input.
h. Rise time is measured on the rising edge of the output intensity from 10% to 90% of full
output power.