I installed a simple system consists of 10Gbps NRZ signal and cw pump laser mixed together across pump coupler co-propagating to a SMF. at the end of the fiber, the pump coupler counter-propagation connected. the Raman pump laser connected to this pump coupler counter-propagation. Raman pumping should enhance the conversion efficiency even with lower pump power.
but I didn't see any effect of the Raman pump on the signal.
the wavelengths were, 1557, 1553, and 1455 nm for the signal, pump, and Raman pump respectively. I think the problem in the pump coupler counter-propagation,
Please could any one can help me to solve this problem?
Hi Adnan, to make it easier could you please add an image (screen capture) of the optical schematic with all the components?
Hi adnan, Counter pumping is perfectly working in optisytem but it taking too much of time compare to the co-propagating method. please ensure that pump power above 1 W ( to reach the threshold) , and Raman contribution parameter in fiber specification. And also use the fiber length at least 10 km to view the signal variation by the Raman effect.
Thank you Silver Sauceda,
Thank you S. Selvendran
thank you for your responses
- Badges
- Science topic