The Digital Offset Phase Locker (DOPLR) is an easy-to-use benchtop instrument for stabilizing voltage-tunable RF signals. The DOPLR has been designed specifically for the phase locking of laser heterodyne beat signals, though other electronic signals such as those from voltage-controlled oscillators (VCOs) can also be used.

DOPLR provides the benefits of all-digital locking capabilities in a user-friendly laboratory instrument form factor. Simply power up and use the convenient knobs and buttons to optimize your loop filter settings.

A common use case is locking the fceo beat frequency obtained from an Octave Photonics COSMO module. Read more about full comb stabilization in our Application Note.