| 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: |
 Click here to retrieve PDF version of paper (199KB) |
