3 results about "Photon density" patented technology

The application relates to the technical field of semiconductor device special equipment manufacturing, and discloses a micro-order regulation method and system based on a metastable energy window. The method emits a pulse photon beam with a specific frequency to the surface of a semiconductor target material, so that lattice atoms enter a metastable energy window; the reflection spectrum of the semiconductor target material is collected in real time during the pulse intermittent period, and lattice vibration mode features are extracted; the lattice vibration mode features are compared with preset metastable energy window boundary threshold values, the photon density and the duration of the next pulse photon beam are dynamically adjusted according to the comparison result, and lattice atoms are repaired by short-range atomic rearrangement in the metastable energy window. The scheme limits energy injection to the metastable interval, and blocks the long-range diffusion path of doped atoms.

The application discloses a kind of dual-wavelength lasers, solve the technical problems that existing dual-wavelength lasers are unstable in power, or system is complex, bulky, or conversion efficiency is low, easily influenced by outside.This application uses semiconductor gain chip as gain medium, optical resonant cavity and optical filter as mode selector, realize controllable dual-wavelength laser output of frequency interval, adopt external cavity structure to obtain lower intracavity noise photon density;Optical resonant cavity used has very narrow filter bandwidth, can avoid mode competition problem, ensure the stable output of dual-wavelength laser;While generating dual-wavelength output, the four-wave mixing nonlinear effect in optical resonant cavity is utilized, and the phase noise and frequency stability of dual-wavelength beat signal are improved.