Patent ID: 11876340
Assignee: SHANGHAI INSTITUTE OF MICROSYSTEM AND INFORMATION TECHNOLOGY, CHINESE ACADEMY OF SCIENCES
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. A laser, at least comprising:
a medium, having a ground state, an intermediate state, and an excited state in ascending order of energy, wherein the excited state is a single level, multiple levels, or continuous levels state;
an excitation system, configured to excite atoms in the medium from the ground state to the intermediate state; and
an excitation laser, configured to drive the atoms in the intermediate state at different spatial positions in the medium to the ground state through a stimulated emission process to generate coherent photons to form a laser, wherein there are two ways for the stimulated emission process, the first way is to excite the electrons in the intermediate state to the excited state and drive the electrons in the excited state to the ground state, and the second way is to directly drive the electrons in the intermediate state to the ground state;
wherein the excitation system comprises an electromagnetic field excitation system or electron gun excitation system.