The invention belongs to the technical field of lasers, and discloses a heat-
pipe-type alkali-
metal vapor
laser device which is used for solving the problem that vapor coagulates on windows in an existing alkali-
metal vapor
laser device. A
gain unit is designed to be of a
heat pipe structure. A left window and a right window are arranged at the two ends of a
pipe shell and sealed. The center of the
pipe shell is sleeved with a heater. A left refrigerator and a right refrigerator are symmetrically arranged at
equidistant positions of the two ends of the heater. The space between the left refrigerator and the heater is filled with a left
thermal insulation material layer, and the space between the right refrigerator and the heater is filled with a right
thermal insulation material layer. The pipe shell is lined with a liquid absorption core, and the liquid absorption core extends from the left end of the left refrigerator to the right end of the right refrigerator in the length direction. A left inflation inlet is formed between the left window and the left refrigerator and is adjacent to the left window, and a right inflation inlet is formed between the right window and the right refrigerator and is adjacent to the right window. A
resonant cavity is of an L-shaped structure formed by an output mirror, a totally-reflecting mirror and a
polarization beam splitter, the output mirror is arranged above the
polarization beam splitter, and the totally-reflecting mirror is arranged on the right of the
polarization beam splitter. The
gain unit is placed between the polarization
beam splitter and the totally-reflecting mirror.