The invention discloses a
laser based on the
cascade effect of a bulk
laser self-variable-frequency material. The
laser comprises a pumping source, a laser
resonant cavity and a bulk laser self-variable-frequency material, wherein the laser
resonant cavity consists of a laser
resonant cavity mirror A and a laser resonant cavity mirror B; the bulk laser self-variable-frequency material at least comprises three optical surfaces; a first
optical surface and a second
optical surface are respectively vertical to a
fundamental frequency light and
multiple frequency phase matching direction (theta1,phi1) and a
fundamental frequency light, frequency doubled light and frequency
phase matching direction (theta2, phi2) in which the self-variable-frequency material has the maximum
nonlinear coefficient; a third
optical surface is vertical to a bisector for the
phase matching directions (theta1, phi1) and (theta2, phi2); the pumping source is used for pumping at least one surface of the self-variable-frequency material; a high-transmittivity film
system is arranged at a position from which pumping light enters;
fundamental frequency light produces frequency doubled light along the phase matching direction (theta1, phi1); and the fundamental frequency light and the frequency doubled light are transmitted in a V form in the self-variable-frequency material and produce sum frequency light (
triple frequency light) along the phase matching direction (theta2, phi2). In the laser, multiple functions such as basic frequency
laser resonance, frequency doubling and frequency summing are realized by using a self-variable-frequency material. The laser has a strong
composite function, a compact structure, high stability and low manufacturing cost.