Patent ID: 7517705

Claim:
A method comprising: (a) providing a phosphorus-containing polymer of the general formula I or II, P(A) m (F) n1 (U) o1 (I) P(A) m (UF n2 ) o2 (II) wherein P represents a linear or branched, uncrosslinked or crosslinked, homo- or heteropolymeric polymer component, A represents identical or different phosphorus-containing groups bonded to P, m represents a number from 3 to 1000, F represents identical or different functional groups bonded directly or indirectly to P which are present in addition to A, n1 represents a number from 1 to 1000, n2 represents a number from 1 to 100, U represents identical or different, linear or branched, uncrosslinked or crosslinked oligomeric or polymeric segments made up of identical or different monomers, which are bonded to P, o1 represents a number from 0 to 1000, and o2 represents a number from 1 to 1000; (b) applying the polymer to a dielectric waveguide so as to form a coating on the dielectric waveguide; and (c) forming an optical signal transducer comprising the coated dielectric waveguide.