Annamalai Muthiah, Stelmakh Nikolai, Vasilyev Michael, Kumar Prem
Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA.
Opt Express. 2011 Dec 19;19(27):26710-24. doi: 10.1364/OE.19.026710.
We develop a method for finding the number and shapes of the independently squeezed or amplified modes of a spatially-broadband, travelling-wave, frequency- and polarization-degenerate optical parametric amplifier in the general case of an elliptical Gaussian pump. The obtained results show that for tightly focused pump only one mode is squeezed, and this mode has a Gaussian TEM(00) shape. For larger pump spot sizes that support multiple modes, the shapes of the most-amplified modes are close to Hermite- or Laguerre-Gaussian profiles. These results can be used to generate matched local oscillators for detecting high amounts of squeezing and to design parametric image amplifiers that introduce minimal distortion.
我们开发了一种方法，用于在椭圆高斯泵浦的一般情况下，找到空间宽带、行波、频率和偏振简并光学参量放大器中独立压缩或放大模式的数量和形状。所得结果表明，对于紧聚焦泵浦，只有一个模式被压缩，且该模式具有高斯TEM(00)形状。对于支持多个模式的较大泵浦光斑尺寸，放大倍数最大的模式形状接近厄米-高斯或拉盖尔-高斯分布。这些结果可用于生成匹配的本地振荡器以检测大量压缩，并设计引入最小失真的参量图像放大器。
