کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
852762 | 909417 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Phase-dependent properties for absorption and dispersion in a closed equispaced three-level ladder system Phase-dependent properties for absorption and dispersion in a closed equispaced three-level ladder system](/preview/png/852762.png)
It is shown that in a closed equispaced three-level ladder system, by controlling the relative phase of two applied coherent fields, the conversion from absorption with inversion to lasing without inversion (LWI) can be realized; a large index of the refraction with zero absorption can be gotten; considerable increasing of the spectrum region and value of the LWI gain can be achieved. Our study also reveals that the incoherent pumping will produce a remarkable effect on the phase-dependent properties of the system. Modifying value of the incoherent pumping can change the property of the system from absorption to amplification and enhance significantly LWI gain. If the incoherent pumping is absent, we cannot get any gain for any value of the relative phase.
Journal: Optik - International Journal for Light and Electron Optics - Volume 119, Issue 11, 21 August 2008, Pages 540–544