10 February 1981 Hole Grating Beam Sampler -- A Versatile High Energy Laser (HEL) Diagnostic Tool
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Abstract
The nole grating beam sampler consists of a uniform array of small circular holes in a highly polished mirror. When used as a turning flat in an HEL optical train, it produces a multiplicity ot angularly separated low-power replicas of the HEL beam in both the transmitted and retlected uirections. It thus provides the opportunity to perform many simul-taneous diagnostic tests such as power monitoring, bore-sight alignment, jitter sensing, wavetront sensing, power-in-the-bucket measurements, and spectral purity measurements in real time during HEL operation on a non-interference basis with the intended mission. The principle of the hole grating beam sampler will be discussed in detail and several relationships usetul to the HEL systems engineer will be derived. The capabilities and limitations of this versatile HEL diagnostic tool will then be discussed in the context of several specific applications.
© (1981) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James E. Harvey, Marion L. Scott, "Hole Grating Beam Sampler -- A Versatile High Energy Laser (HEL) Diagnostic Tool", Proc. SPIE 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I, (10 February 1981); doi: 10.1117/12.965661; https://doi.org/10.1117/12.965661
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