DigiLock 110 offers Lock-In and Pound-Drever-Hall Techniques
The DigiLock 110 module offers both Lock-In and Pound-Drever-Hall techniques for top-of-fringe locking. Both techniques work with modulating/demodulating the laser frequency and the measured photo diode signal. The modulation frequencies are variable and reach up to 780 kHz for the Lock-In module and up to 25 MHz for the Pound-Drever-Hall module. These high modulation frequencies allow for a higher locking bandwidth and therefore a more stable lock.
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