1980-06-23
1983-02-15
Nussbaum, Marvin L.
350 9616, G02B 5172
Patent
active
043737757
ABSTRACT:
An assembly for a bidirectional wavelength dependent beam splitter is disclosed together with a method of fabricating a thin film dichroic element. A dichroic material is applied to the surface of a suitable substrate. The substrate with this applied coating is then immersed in a solvent bath such that the dichroic thin film is either lifted off the substrate or the substrate is dissolved in the solvent bath, thus leaving an extremely thin film comprising the dichroic coating. The dichroic coating is positioned over the end face of a polished fiber beam splitter half and secured thereto by a thin layer of an optical grade epoxy. In the beam splitter configuration, a second polished fiber is secured in a similar manner to the opposite side of the thin film to form a beam splitter structure and hence, to provide a bidirectional wavelength dependent optical coupling device.
REFERENCES:
patent: 3767290 (1973-10-01), Lang et al.
International Telephone and Telegraph Corporation
Nussbaum Marvin L.
O'Halloran John T.
Van Der Sluys Peter C.
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