物理
射线传递矩阵分析
光学
高斯光束
梁(结构)
光线追踪(物理)
几何光学
相(物质)
对称(几何)
高斯分布
光束
平方米
歪斜
激光束质量
几何学
量子力学
数学
激光束
激光器
天文
出处
期刊:Applied optics
[The Optical Society]
日期:1985-02-15
卷期号:24 (4): 538-538
被引量:60
摘要
This paper shows that a fundamental Gaussian beam propagating in a lenslike medium with cylindrical symmetry can be generated by the rotation about its axis of a skew ray which obeys the laws of geometrical optics. A complex representation: X(z) = ξ(z) + jη(z), where ξ(z) and η(z) are the projections of the skew ray on two perpendicular meridional planes, is discussed. It is found that the beam radius is equal to the modulus of X(z) and the on-axis phase to the phase of X(z). Using this representation, we derive a general expression for the on-axis phase shift ΔΦ experienced by a beam with an input complex beam parameter q through an optical system whose ray matrix is [ABCD]:ΔΦ=phase of(A+B/q). When the beam is matched to the optical system (output q = q), ΔΦ can be written cos–1(A + D)/2. This representation also provides a useful beam tracing method which is demonstrated and a simple interpretation for the known representation of Gaussian modes by ray packets.
科研通智能强力驱动
Strongly Powered by AbleSci AI