Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-10-18
2008-10-28
Font, Frank G (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S031000, C385S039000, C385S047000, C385S115000, C385S116000, C372S050120, C372S050230
Reexamination Certificate
active
07444046
ABSTRACT:
A single piece optic for coupling the output of a diode laser array into an optical fiber array is provided. The coupling optic has a planar back surface which, during use with a diode laser array, is positioned substantially parallel to the front face of the laser array. The coupling optic is fabricated from a single substrate and is comprised of a plurality of optical elements. Depending upon the technique used to fabricate the optical elements, the individual optical elements may be trapezoidally-shaped or rectangularly-shaped. The front surface of each optical element is tilted, thus preventing reflected laser radiation from resonating within the diode laser's emitters. Preferably the wedge angle for the tilted front surface is greater than 2 mrad, thus accomplishing the goal of limiting feedback into the emitters, and less than 4 mrad, thus reducing beam steering. Additionally each optical element is shaped to reduce the divergence of the emitters in the fast axis, thus allowing the output from each emitter to be effectively coupled into the corresponding optical fiber.
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Font Frank G
Lepisto Ryan
nLight Photonics Corporation
Patent Law Office of David G. Beck
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