External cavity laser with continuous tuning of grid generator

A laser with the gate generator, which to the grid generator so that the transmission the bump is connected to form or exchange during laser operation. The power grid at least two different of the second lattice inside adjustable. The laser is connected with the one, and a path with adjustable selector's external cavity laser the external cavity. The laser capable further comprises a head or a tuning module; the head or a tuning module can use the coupled to the grid generator, and is configured to the grid generator adjustment to the thickness of the signal grid.