Patent ID: 8896779

Claim:
A laser oscillation device comprising: a first substrate which has a flat surface; a second substrate which has a flat surface and is disposed above the first substrate in such a manner that a wedge cell having a thickness-change direction is formed between the first substrate and the second substrate; and a liquid crystal layer which is formed by two or more liquid crystals which are doped by one or more laser dyes and injected into the wedge cell and have different pitches, wherein the wedge cell forms a different thickness by the flat surface of the first substrate and the flat surface of the second substrate, wherein the two or more liquid crystals diffuse in the wedge cell having the different thickness to form consecutive pitch gradients to form a one-dimensional laser cavity array with a continuously changing cavity length, wherein, in the wedge cell along the thickness-change direction of the wedge cell, a continuous linear increase in optical pitch is caused by diffusion, a pitch gradient matching with a slope of the cell thickness, and wherein the first substrate and the second substrate are coated with alignment layers.