THORLABS LCC3111, Руководство пользователя

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Liquid Crystal Noise Eater
Chapter 5: Operation
Page 10
5.3. Modulate the Output Power
There is a SMC interface at the right side of the noise eater, which can be used
to modulate the attenuation of the noise eater. The modulation input has a 10 k

input impedance. A voltage ranging from 0 to 2.5 V can be input to modulate the
output power as needed. Before modulating the output power, first turn the
output power level knob clockwise to the end of its travel (minimum output power
setting).
Figure 6 Modulated Output Power with a Sinusodial Input Signal (Left) and
SMC Modulation Input (Right)
Figure 7 Noise Eaters Modulation Performance
5.4. Setting the Output Power Level
The noise eater operates by varying how much of the signal is attenuated in
order to reach the target output power and attenuate the noise. Since the noise
eater can attenuate the signal but not amplify it, the clean output beam can only