Dispersion slope  compensation  module  DCM can compensate  the  dispersion with optimized residual  dispersion  for  standard  single-mode fiber (G.652) in the C-band.The modules based on mature and   reliable  optical  fiber  technology   with  excellent  performance  for optical  transmission  system. DCM modules  are  available  with any dispersion  values from -10 to -2100 ps/nm  at 1550nm  wavelength.