7

Continued

SWEPT WAVELENGTH SYSTEM (SWS-OMNI EXPANSION SERIES)

Ty pical Group Delay Perfor mance Cu r ves (3

σ)

Ty pical Differential Group Delay Perfor mance Cu r ves (3

σ)

SWS-OMNI Virtual Modulation Frequency Feature (VMFF)

To improve the group delay noise and resolution, conventional modulation

phase measurement techniques often employ an adjustable modulation

frequency, which needs to be set before measurements are made. In contrast,

the SWS-OMNI system uses the proprietary VMFF. All swept group delay

measurements are made at a fixed modulation frequency (192 MHz) optimized

for the 3 pm wavelength sampling step of the SWS. The data is then

post-processed to achieve higher effective modulation.

Performance Curves