Analysis of an improved Lyot depolarizer in terms of the multi-beam superposition treatment

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2013,（4）
• 页码范围: 246-249
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-013-2423-x

摘要

In order to study the depolarization properties of an improved Lyot depolarizer with monochromatic light,the theory of multi-beam superposition is adopted.The dependences of degree of depolarization (D) on vibration azimuth angle (VAA) and total retardation (TR) are analyzed.The results show that D is ideal for any VAA when TR is δ=(N+l/2)π(N is an integer) on the basis of wedge angle large enough.And when δ=Nπ,VAA makes the most significant impact on D.When δ is assigned to the other values,the impact on D made by VAA is between the former two.Using a 405 nm semiconductor laser,experiments for measuring D of the sample with wedge angle of 6° are conducted.The theoretical results are well verified by experiments.D is over 98.8％ when TR is nearly δ=(N+l/2)π by changing the incident angle.