Frequency and phase locking method for laser array

摘要: A system and method are described for establishing a common operating frequency phase the lasers in two-dimensional array, each of which has an actual deviates from nominal frequency. waveguide structure is placed path beams emitted various lasers, plurality optical gratings provided alignment with laser to deflect portions into propagation along cross-coupling other array. The periodic characterized by grating periods substantially equal λ/n 1 , thickness core at least approximately λ/(4√n 2 -n 3 ), where λ wavelength guided mode, n effective refractive index indices substrate, respectively. Two-dimensional coupling achieved either one direction evanescent direction, or pair beam angles produce both directions.