Views:2 Author:Site Editor Publish Time: 2019-05-24 Origin:Site
The following aspects: 1 Splash type of life mode A certain form of light with a certain face rate and a certain space travel direction is defined as a specific wave type, the selection of the specific beam form, the resonant cavity discussed The specific form is related, for example, the plane wave is selected in the case of the plane number, JH silicon reflective lens the spherical wave is selected in the case of the unstable cavity and the virtual concentric cavity, and the narrow-beam beam is selected as the basic form of the waveform in the case of the general stable spherical cavity.
2 Different wave type navigation years are different. It is determined that an oscillating beam is repeatedly reciprocated in the cavity. On the one hand, it is subjected to the gain amplification effect of the working substance, and on the other hand, it is inevitably subjected to various loss factors, including: (1) Through the output "loss" of the JH silicon reflective lens, (11) the scattering of the working substance in the cavity and the harmful absorption loss of the non-working particles, the loss caused by the pure surface effect, (V) by the geometric silicon The lateral deflection loss of the beam that can be foreseen by the reflective lens. Among the above four sensing mechanisms, the first two kinds of loss effects of th JH silicon reflective lense can be considered to be the same for all modes; the third loss is negligible for geometrical optics (for example, for stabilizing the spherical cavity) In the case where the Fresnel number of the cavity is N>10, the radiation loss of all modes can be neglected compared with other loss effects); the lateral deflection loss of the last beam is, in many cases, metastable and Non) is different for different modes and is the key to the cavity-to-wave limitation. It is also the focus of analysis and design of the cavity. 3 Determination of common cavity and common troubles - Intracavity oscillating beam inevitably produces multi-silicon reflective lens beam interference effect during multiple round trips, so the cavity can be regarded as a multi-beam interferometer. Using the interferometer theory, the wavelength or frequency resonance condition that the oscillating beam satisfies is obtained, and the resonance spectrum structure is further determined. 4 JH silicon reflective lens The effect of the actual resonant cavity deviating from the ideal situation - The theory of the resonant cavity is generally analyzed in the case of an ideal cavity.
In the face of any actual laser, there are different degrees of the influence of the resonant cavity deviating from the ideal situation. . These factors include: (1) the influence of the optical processing quality of the mirror surface of the silicon reflective lens, such as the flatness, the sphericality, the surface area error, the limitation of the finish, etc., () JH silicon reflective lens the influence of the adjustment accuracy of the resonant cavity, such as the parallelism, Axis accuracy, confocal or concentric accuracy limits, etc.: (i1) The influence of the optical quality of the JH silicon reflective lens of the working substance in the cavity, such as the machining accuracy of the end face of the working material, and the internal static (when no excitation is applied) the refractive index non-uniformity (v) the influence of the dynamic optical quality of the working substance in the cavity, for example, the flow effect inside the gas during the operation of the laser, the thermal distortion effect of the refractive index of the solid material under the action of the optical pump, etc. The optical quality of the internal working substance JH silicon reflective lens (refractive index uniformity) is further deteriorated. The overall result of the above four deviations from the ideal situation is that the directionality of the output beam of the resonant cavity is degraded, the apparent consumption is increased, and the discrete spectral structure becomes modular and complex. Therefore, it is necessary to reduce the influence of the above factors in the design, especially the impact of the change.