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Journal ArticleDOI
D. A. Van Baak, George Herold 
9 Citations
Our results show how a lock-in amplifier can be used to measure the spectral density of noise in the case of a noise-only input signal.
It is shown that utilizing the data and error channels to make the lock decision will prevent false lock from occurring.
In turn, lock-free algorithms provide significant reliability and performance advantages over lock-based implementations.
The lock proves to be stable and robust, and all the locking parameters can be set and optimized on a computer interface with convenience, making the lock adaptable to various setups of laser systems.
It is shown that the windowing technique reduces the phase noise required for breaking the frequency lock in the receiver.
To the best of our knowledge, this is the first lock-free method that provides all of these properties.
Experimental results show the advantages of the proposed lock-in
Using the 2 ω c lock-in, the main signal of interest keeps away from the influence of the 1/ f noise, providing a much higher dynamic reserve.
Proceedings ArticleDOI
11 May 2017
16 Citations
Hence, the lock is a unique combination of various aforementioned security features providing absolute solution to problem of security.

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