Integrated solid single-frequency laser based on non-planar annular cavity

The embodiment of the invention discloses an integrated solid single-frequency laser based on a non-planar annular cavity, and the laser comprises a packaging housing which is divided into a first cavity and a second cavity through a transmission window, a light source providing mechanism, a light source processing mechanism, a laser oscillator assembly located in the second cavity, and a collimating lens group located in the second cavity. The output mechanism is at least partially positioned outside the packaging shell; wherein the light source processing mechanism is located between the light source providing mechanism and the transmission window, and/or located between the transmission window and the laser oscillator assembly; the collimating lens group is located on a path where emergent light of the laser oscillator assembly is located; the output mechanism is connected with the packaging shell through an optical fiber. The light source providing mechanism and the laser oscillator assembly are packaged