Composite structure type tunable grating outer cavity dual-mode laser machine

Abstract

The invention discloses a composite structure type tunable grating outer cavity dual-mode laser machine. The composite structure type tunable grating outer cavity dual-mode laser machine comprises a gain component, a lens, a grating and a plane mirror, wherein light emitted from the end face of one side of the gain component is collimated by the lens and then irradiated to the surface of the grating in a incident mode (the incident angle is theta), and diffraction is generated, two beams of diffraction light which are lambda 1and lambda 2 in wave length move forward along the following two paths respectively: firstly, the m level diffraction light which is lambda 1in wave length goes back to the gain component in the incident direction along the same path from which the light comes, wherein m is an integer except zero, and the diffraction angle is equal to the incident angle theta, so that a laser mode which is lambda 1in wave length is formed between the grating and the end face of the other side of the gain component, and secondly, the n level diffraction light which is lambda 2 in wave length goes back to the gain component in the incident direction along the same path from which the light comes after being reflected by the plane mirror and secondly diffracted by the grating, wherein n is an integer except zero and not equal to m, and the diffraction angle is phi, so that a laser mode which is lambda 2 in wave length is formed between the plane mirror and the end face of the other side of the gain component through the grating.

Description

technical field [0001] The invention relates to the field of optics and laser technology, in particular to a composite configuration tunable grating external cavity dual-mode laser, which can simultaneously output laser light of two wavelengths. Background technique [0002] Terahertz waves generally refer to electromagnetic waves with a frequency in the range of 0.1-10THz, whose high-frequency end overlaps with far-infrared waves, and whose low-frequency end overlaps with millimeter waves. Spectroscopy, imaging, and communication technologies based on terahertz waves have important application prospects in many aspects such as national defense, security detection, drug detection, biomedical diagnosis, astronomical observation, environmental monitoring, material quality detection, inter-satellite communication, and scientific research. Therefore, terahertz science and technology have attracted much attention, and it involves all aspects of terahertz wave generation, transmis...

AI Technical Summary

Problems solved by technology

The configuration of these external cavities is relatively complicated, and the adjustment of the optical path is inconvenient.

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