A new (three-dimensional) type of self-trapped beam connected with the rotation of the field phase is obtained. It is shown that the field intensity is ring-shaped, and the field distribution has a rotating spiral character, its parameters being expressed through constants of the motion. Existence conditions for such spiral-like beams are indicated. © 1985.
Kruglov, V. I., & Vlasov, R. A. (1985). Spiral self-trapping propagation of optical beams in media with cubic nonlinearity. Physics Letters A, 111(8–9), 401–404. https://doi.org/10.1016/0375-9601(85)90481-5