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|Author(s):||Xiaoyu X. Li; Thomas Scott; Christopher L. Cromer; Joshua A. Hadler;|
|Title:||Reflective optical chopper used in NIST high-power laser measurements|
|Published:||November 01, 2008|
|Abstract:||For the past ten years, NIST has used high-reflectivity, optical choppers as beamsplitters and attenuators when calibrating the absolute responsivity and response linearity of detectors used with high-power CW lasers. The chopper-based technique has several advantages over the use of wedged-shaped transparent materials (usually crystals) often used as beamsplitters in this type of measurement system. We describe the design, operation and calibration of these choppers. A comparison between choppers and transparent wedge beamsplitters is also discussed.|
|Citation:||Journal of Research (NIST JRES) -|
|Pages:||pp. 305 - 309|
|Keywords:||attenuator, high-power laser, infrared (IR), K-series calorimeter, laser beamsplitter, laser detector calibration, laser power meter, monitor detector, optical crystal, reflective optical chopper (ROC), ZnSe.|
|PDF version:||Click here to retrieve PDF version of paper (204KB)|