| abstract |
A semiconductor laser array capable of reducing speckle noise with a simple configuration is provided. A plurality of ridge portions 13 having stripe widths equal to each other are provided in parallel. The intervals P1, P2, P3 of the plurality of ridge portions 13 are gradually reduced from the end of the array toward the center. The plurality of ridges 13 are densely arranged at the center and sparsely arranged at the ends. As a result, the spectral bandwidth of the combined light is significantly widened, and the spectral distribution of the combined light is uniform. [Selection] Figure 1 |