A light steering apparatus comprising: a tunable laser source adapted to output a plurality of optically coherent laser beams (L1, L2), the tunable laser source comprising a first waveguide and second waveguide; wherein the tunable laser source further comprises: - first ring resonator disposed between the first waveguide and the second waveguide; and - a second ring resonator disposed between the first waveguide and the second waveguide and spaced apart from the first ring resonator; and wherein the light steering apparatus further comprises: a steering device comprising a plurality of modulation units (271, 272) for beam steering; wherein the plurality of optically coherent laser beams, output from the tunable laser source, are incident on the steering device, and characterised in that: the first waveguide comprises a first side and a second side and the second waveguide comprises a first side, adjacent to the first side of the first waveguide, and a second side, adjacent to the second side of the first waveguide; and the plurality of laser beams comprises a first laser beam output from the first side of the first waveguide and a second laser beam output from the second side of the second waveguide. - first ring resonator disposed between the first waveguide and the second waveguide; and - a second ring resonator disposed between the first waveguide and the second waveguide and spaced apart from the first ring resonator; and wherein the light steering apparatus further comprises: a steering device comprising a plurality of modulation units (271, 272) for beam steering; wherein the plurality of optically coherent laser beams, output from the tunable laser source, are incident on the steering device, and characterised in that: the first waveguide comprises a first side and a second side and the second waveguide comprises a first side, adjacent to the first side of the first waveguide, and a second side, adjacent to the second side of the first waveguide; and the plurality of laser beams comprises a first laser beam output from the first side of the first waveguide and a second laser beam output from the second side of the second waveguide. a steering device comprising a plurality of modulation units (271, 272) for beam steering; wherein the plurality of optically coherent laser beams, output from the tunable laser source, are incident on the steering device, and characterised in that: the first waveguide comprises a first side and a second side and the second waveguide comprises a first side, adjacent to the first side of the first waveguide, and a second side, adjacent to the second side of the first waveguide; and the plurality of laser beams comprises a first laser beam output from the first side of the first waveguide and a second laser beam output from the second side of the second waveguide. the first waveguide comprises a first side and a second side and the second waveguide comprises a first side, adjacent to the first side of the first waveguide, and a second side, adjacent to the second side of the first waveguide; and the plurality of laser beams comprises a first laser beam output from the first side of the first waveguide and a second laser beam output from the second side of the second waveguide.