Directional output deformed square microcavity semiconductor laser

The invention provides a deformed square microcavity semiconductor laser with directional output, and the semiconductor laser comprises an echo wall microcavity (1) which is of a deformed square structure, and the two edges, where the vertex of one square is located, of the deformed square are arc edges; the waveguide (2) is of a rectangular structure, a first end and a second end (5) are sequentially formed in the length direction of the waveguide (2), and the first end is connected with the echo wall microcavity (1); wherein the FP mode in the waveguide (2) is coupled with the echo wall mode in the echo wall microcavity (1), and the formed coupling mode is output directionally along the second end (5) of the waveguide (2). The semiconductor laser disclosed by the invention has the advantages of high quality factor, high output efficiency and high fundamental mode ratio, so that the laser is easy to realize low-threshold, high-power and good-beam-quality output and has anti-feedback capability. 本公开提供一种定向输出的变