
less intrus ive to the environment, can be more easily placed in a wider variety of
locations than the bigger cabinets and experience less vandalism.
10.7.4 Fiber Performance Technology Advances
There is another important technology development that is beginning to play a role
in reducing the overall FTTx system cost. This is the discovery that the stimulated
Brillouin scattering (SBS) threshold in fiber can be increased, allowing higher
launch power for analog signals without introducing more system impairments
[48, 49]. To begin with, in both HFC and FTTH systems, the analog signal loss
budget is the limiting factor in determining the reach from