Fixed Differential Group Delay

Fixed Differential Group Delay

No more large spools of PM fiber are needed for generating a large amount of differential group delay (DGD) between two orthogonal polarization states. General Photonics' compact device can provide pure first-order PMD with values up to 100 ps with the standard package. DGD values up to microseconds can be custom made with minimum charges. PolaDelay can be used to simulate the PMD effect in the fiber link, check the performance of testing equipment, or replace hundreds meters of PM fiber to equalize DGD accumulated in a transmission fiber link for a PMD compensator. The compact and rugged package provides high performance and superb environmental stability.


Applications

• PMD emulation
• PMD compensation
• TDM bit alignment

Specifications

Operating Wavelength	1550 ± 50 nm
Insertion Loss	0.9 dB typical, 1.2 dB max.
DGD Values	0 to 100 ps standard
2nd order PMD	< 90 ps2
Return Loss	55 dB
Optical Power Handling	300 mW min.
Operating Temperature	0 ~ 70 °C
Storage Temperature	-40 ~ 85 °C
Fiber Type	SMF-28 fiber
Dimensions	28 ? 18 ? 10 mm