PHOTON STATISTICS OF A CAVITY-QED LASER - A COMMENT ON THE LASER-PHASE-TRANSITION ANALOGY
PHOTON STATISTICS OF A CAVITY-QED LASER - A COMMENT ON THE LASER-PHASE-TRANSITION ANALOGY
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DOI：
10.1103/physreva.50.4318
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发表时间：
1994-11-01
影响因子：
2.9
通讯作者：
CARMICHAEL, HJ
中科院分区：
文献类型：
--
作者：
RICE, PR;CARMICHAEL, HJ
建立了腔QED激光器的生灭模型，分析了自发辐射进入激光模的比例β对激光阈值的影响。我们定义阈值的Fano因子的内腔声子数。我们强调了β作为表征“系统尺寸”的参数的作用，并表明激光阈值的概念在“热力学”极限β− 1→∞中得到了很好的定义。一个理想的腔QED激光器远远超出这个限制，因此，与传统的激光器相比，不是一个阈值设备。我们目前的数值结果显示这种差异如何影响设备的噪声特性。
We develop a birth-death model for a cavity QED laser and analyze the dependence of the lasing threshold on the fraction, β, of spontaneous emission directed into the laser mode. We define threshold in terms of the Fano factor for the intracavity phonon number. We emphasize the role of β as a parameter characterizing the ‘‘system size’’and show that the concept of laser threshold is well-defined in the ‘‘thermodynamic’’limit, β− 1→∞. An ideal cavity-QED laser operates far outside this limit and therefore, in contrast to a conventional laser, is not a threshold device. We present numerical results showing how this difference affects the noise properties of the device.