The laser oscillation condition for an N-mirror system is found. Examples are given for systems with as many as five mirrors.Christian PedersenTorben SkettrupC. Pedersen and T. Skettrup, "Laser modes and threshold conditions in N-mirror resonators", Journal of the Optical Society of America B...
6、 of atoms in level 1 is short compared to t2,we can neglect N1 compared to N2 and the threshold condition is satisfied when N2Nt.Therefore,laser oscillation begins when the upper laser level acquires,by pumping,a population density equal to the threshold value Nt.参与激光作用的下能级是基...
The oscillation condition of the GaInAsP/InP surface emitting (SE) junction laser (lambda=1.3 mum) is examined. Theoretical calculations indicate that reflectivity of the mirrors of a Fabry-Perot resonator must be 95% for a reasonably low threshold current density. The authors fabricated a new str...
•Operationatthreshold•阈值反转集居数密度•阈值增益系数•连续或长脉冲激光器的阈值泵浦功率•短脉冲激光器的阈值泵浦能量 （一）阈值反转集居数密度 深圳大学电子科学与技术学院 (populationinversiondensityatthreshold)•能否产生振荡，取决于增益与损耗的大小。•谐振腔的长度L往往大于工作物质的长度l，假...
The minimum level of some input quantity needed for some process to take place, such as a threshold energy for a reaction, or the minimum level of pumping at which a laser can go into self-excited oscillation. (physiology) The minimum level of a stimulus that will evoke a response in ...
At a pumping level that is strong enough to create a population N2=N1=N0/2 in the upper laser level, the optical gain is zero. To satisfy the oscillation condition the pumping rate has to be further increased until (四)短脉冲激光器的阈值泵浦能量 四能级激光器与三能级激光器的比较 三能级...
The data acquisition process consisted of the registration of the laser output power as a function of the incoming solar power, which was controlled by the shutter (not shown in Fig. 1). As shown in Fig. 8, under clear sky condition with 930 W/m2 solar irradiance, when a 98% PR1064 ...
(a), for pico pumping and (b), for nano pumping condition. Shaded areas represent the spectral range for two pumping conditions showing that sustained pumping enables mode interaction and laser emission narrowing. Full size image It is also possible to act on the intensity fluctuation through a...
When the laser oscillation was observed by top-viewing microscopy, no laser spectra could be obtained; only fluorescence was observed. Therefore, the intensity profiles of the microdisk with an ink-jet-printed spot shaped like a top-flat plano-convex lens were revealed by three-dimensional NS-...
(we focus on the TE-like modes), we can reduce the memory consumption and increase the running speed by only simulating half of the structure with the help of the applied perfect magnetic conductor boundary condition in the xy-plane. In addition, perfectly matched layer domains are used to ...