Injection type optical parametric oscillation device and method

The invention discloses an injection type optical parametric oscillation device and method. By introducing the interaction of seed light and pump light to excite signal light with the same wavelengthas the seed light, the purpose of adjusting the wavelengths of the signal light and idler frequency light is achieved. The injection type optical parametric oscillation device comprises an optical parametric oscillation cavity and an adjusting system. Seed light passes through a phase modulation crystal and is injected into the optical parametric oscillation cavity, and signal light is locked in the wavelength center of the seed light through a phase locking crystal. According to the invention, the wavelength locking of the signal light and the seed light is realized by using the injection idea, and the light emitting threshold of the optical parametric oscillator can be reduced after the seed light is injected. The wavelength of the signal light is stably locked relative to the wavelengthof the seed light for a l