NIST logo

Publication Citation: Reflective optical chopper used in NIST high-power laser measurements

NIST Authors in Bold

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) -
Volume: 113
Issue: 6
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.
Research Areas: Optoelectronics
PDF version: PDF Document Click here to retrieve PDF version of paper (204KB)