25 September 1989 Novel Waveplate Designs For The IR Spectrum
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Infrared optical systems, including ellipsometers and sensors, make frequent use of traditional waveplate technology. In some cases, the limited spectral bandwidth associated with conventional IR waveplates has limited the wavelength range over which these systems can perform. The mathematical procedures for designing broadband waveplates have long been available, but suitable materials for IR applications have been limited. Recent efforts in IR crystal growth have provided a wider range of birefringent materials which can be used for novel waveplate designs. This paper examines basic waveplate theory, including the relatively unknown effects of etaloning in the presence of finite surface reflectance, and proceeds to a discussion of both conventional and novel waveplate designs. These include tunable and achromatic waveplates covering all or part of the NIR-IR wavelength spectrum. Materials such as AgGaS2, MgF2, CdS and mixed CdSxSe1-x crystals will be discussed. Several designs specific to multiple wavelength lasers and frequency agile lasers will be covered.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey H. Bohn and David A. Roberts "Novel Waveplate Designs For The IR Spectrum", Proc. SPIE 1104, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals, (25 September 1989); doi: 10.1117/12.960599; https://doi.org/10.1117/12.960599

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