Quantum Interference Effects on Optical Amplification and the Index of Refraction in a Four-Level System
Reads0
Chats0
TLDR
In this article, a four-level system where a metastable state is included in an $Er −3＋}$ Doped Yttrium aluminum garnet (YAG) crystal was constructed.Abstract:
We construct a four-level system where a metastable state is included in an $Er^{3＋}$ Doped Yttrium aluminum garnet (YAG) crystal. Because of the action of the coherent field, the traditional light amplification with inversion can be exhibited with remarkable variation. As a result, we propose a method to achieve the gain equalization by atomic coherence. At the same time, we find that the high index of refraction accompanied by vanishing absorption can also be reached in this model. We also find that a higher index of refraction with zero absorption can be easily obtained when the coherent field is off resonance.read more
Citations
More filters
Proceedings Article
Observation of Electromagnetically Induced Transparency in Collisionally Broadened Lead Vapor
TL;DR: In this article, the probe energy is increased to 150 n3 (10" W/cm ) and the absorption cross section at the transmission maximum increases by a factor of approximately 2.
Journal ArticleDOI
Lasing without population inversion in an Er 3+ -doped YAG crystal
TL;DR: In this article, two atomic models for an Er3+-doped YAG crystal with application to lasing with and without population inversion were proposed for an incoherent pumping field and coherent control coupling field.
Journal ArticleDOI
High index of refraction via quantum interference in a three-level system of Er 3+ -doped yttrium aluminium garnet crystal
TL;DR: In this article, a simple three-level system was proposed to produce high index of refraction with zero absorption in an Er3+-doped yttrium aluminium garnet (YAG) crystal.
References
More filters
Journal ArticleDOI
Observation of electromagnetically induced transparency.
TL;DR: In this paper, the authors report the first demonstration of a technique by which an optically thick medium may be rendered transparent by applying a temporally smooth coupling laser between a bound state of an atom and the upper state of the transition which is to be made transparent.
Proceedings Article
Observation of electromagnetically induced transparency
TL;DR: The first demonstration of a technique by which an optically thick medium may be rendered transparent is reported, which results from a destructive interference of two dressed states created by applying a temporally smooth coupling laser between a bound state of an atom and the upper state of the transition which is to be made transparent.
Journal ArticleDOI
Nonlinear optical processes using electromagnetically induced transparency
TL;DR: In this paper, a strong coupling field between a metastable state and the upper state of an allowed transition to ground was proposed to obtain a resonantly enhanced third-order susceptibility while at the same time inducing transparency of the media.
Proceedings Article
Nonlinear-optical processes using electromagnetically induced transparency
TL;DR: It is shown that by applying a strong-coupling field between a metastable state and the upper state of an allowed transition to ground one may obtain a resonantly enhanced third-order susceptibility while at the same time inducing transparency of the media.
Journal ArticleDOI
Lasers without inversion: Interference of lifetime-broadened resonances
TL;DR: It is shown that if two upper levels of a four-level laser system are purely lifetime broadened, and decay to an identical continuum, then there will be an interference in the absorption profile of lower- level atoms, and that this interference is absent from the stimulated emission profile of the upper-level atoms.