General Photonics announces PMD and PDL measurements that exceed NIST accuracy standards
Chino, CA--General Photonics has developed a calibration system for its polarization-measurement system (the PSGA-101A) and confirmed that the accuracy of the PSGA system exceeds that of NIST "artifacts" (metrology standards).
In other words, General Photonics researchers have developed artifacts that are more accurate than standard NIST reference materials. According to the company, the artifacts enabled them to confirm that the capability of the PSGA far exceeds all known commercial instruments with regard to accuracy, repeatability, and resolution. The conclusions of the paper were published in the OSA's Optics Express journal.1
Polarization-mode dispersion (PMD) PMD affects the reliability of fiber-optic data when the transmission speed exceeds 10 Gbit/s. Emerging communication systems operate at 40 Gbit/s and future systems will operate at speeds beyond 100 Gbit/s.
The results for accuracy, repeatability, and resolution, respectively, of the General Photonics system are as follows. For differential group delay (DGD), or first-order PMD: 2.6 fs, 0.022 fs, and 1 fs. For second-order PMD (SOPMD): 1.39 ps2, 0.28 ps2, and 0.005 ps2. For polarization-dependent loss (PDL): 0.06 dB, 0.034 dB, and 0.01 dB.
REFERENCE:
1. X. Steve Yao et al., Optics Express, Vol. 18, No. 7, March 29, 2010.
For more info, visit www.generalphotonics.com.
John Wallace | Senior Technical Editor (1998-2022)
John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.