Title: Low-loss signal coupler for optical communications and integrated optics

Abstract: A method and means for coupling information or signal power into or out of iber optics for integrated optical waveguides. The coupling consists of selectively doping with impurity ions such as rare earth or transition metal ions which are excited to fluorescence within the waveguide by the frequency of the transmitted carrier wave. The fluorescent emission is then detected at right angles to the fiber using conventional photodetectors and amplifiers.

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Inventors: Caspers, Hubert H. (La Mesa, CA, US)
Rast, Jr., Howard E. (Salana Beach, CA, US)

Application Number: 729052
Filing Date: 1976-10-04
Publication_date: 1978-03-28
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 250/227.24 359/900, 385/48, 385/125
Other Classes:
US Patent Ref:

2358867	Sep, 1944	Madan	240/2.
2695964	Nov, 1954	Schepker	250/368.
2798147	Jul, 1957	Orsatti	240/2.
3135866	Jun, 1964	McNaney	250/213.
3526880	Sep, 1970	Filippazzi	350/96.

Other Refs:
Primary Examiner: Nelms, David C.
Assistant Examiner:
Attorney: Sciascia; R. S., Rubens; G. J., Phillips; T. M.