The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1991
Filed:
Feb. 13, 1990
Applicant:
Inventors:
Tomasz P Jannson, Torrance, CA (US);
Joanna L Jannson, Torrance, CA (US);
Assignee:
Physical Optics Corporation, Torrance, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9615 ; 350 9611 ; 350 9612 ; 350 9619 ;
Abstract
An apparatus for coupling light waves into a single-mode planar waveguide comprises a curved multi-mode waveguide. The multi-mode waveguide is thick so that its mode structure is practically continuous and its coupling wavelength selectivity is low. The curved multi-mode waveguide presents a variable single-mode coupling gap to the adjacent single-mode planar waveguide which achieves optimum balance between phase and amplitude conditions for coupling a broad range of wavelengths and tolerates varying wavelength light sources.