The green energy saving of optical networks is a hot topic of current research and the power aware RWA algorithm as an effective power saving method for service assignment attracts extensive attention.However

the relevant existing research results ignore the role of wavelength converters can play in optical network power saving.This paper presents a novel power aware RWA algorithm

i.e.Load-Based Cost enhanced with Wavelength Conversion（LBC-WC）

aiming at using wavelength converters to concentrate more lightpaths in fewer fibers.It conducts simulation based on wavelength switch optical network with sparsely deployed wavelength converters and the results indicate that this algorithm can significantly reduce the number of fibers used in networks

effectively raise the fiber utilization rate and improve the network energy efficiency.