Device for generating microwave and millimeter wave of linear cavity polarization-preserving optical fiber laser

The present invention relates to a microwave and millimeter wave generating device for linear cavity polarization-maintaining optical fiber laser in the microwave photonic technical field. The device comprises pump light, a linear cavity polarization-maintaining optical fiber laser and a high-speed photodetector. The present invention integrates the technical advantages of radio frequency wave and light wave, utilizes the wavelength selection characteristic of optical fiber gratings, and uses polarization-maintaining active optical fiber as the gain medium of the laser; the uniform optical fiber gratings are written into two ends of the polarization-maintaining active optical fiber, or the optical fiber gratings are written into one end of the polarization-maintaining active optical fiber, and the other end of the polarization-maintaining active optical fiber is plated with a high reflectance film corresponding to the wavelength of the optical fiber gratings; a laser cavity is formed by the resonance between