The helicity of linearly polarized pump beam was modulated at 50 kHz by a photoelastic modulator for lock-in detection.
The bell can be modulated at the will of the subscriber.
It may be interesting to see how anti-government tones may be modulated at a moment when its emergency role is immediate and obvious.
The pulse amplitude was sinusoidally modulated at five different frequencies.
Incident light was modulated at frequency, higher than water cut-off frequency [3].
Signal pairs with time-varying coherence, i.e., Gaussian noise modulated at 0.6 and 1.2 Hz.
The pump pulses were modulated at 2 KHz with a chopper.
Because LED bulbs are semi-conductor devices, the current, and hence the optical output, can be modulated at extremely high speeds which can be detected by a photo-detector device and converted back to electrical current.
The sample was modulated at 220 Hz by the same 532 nm laser with an excitation power of 3 mW.
Rejecting fluorescent light modulated at higher frequencies, however, requires processing techniques similar to those used for OOK/ASK [123].
By varying the position of the of source masses, the induced GSO magnetization is modulated at acoustic frequencies.
