Optical waveguides – With optical coupler – Input/output coupler
Patent
1990-10-31
1992-04-28
Ullah, Akm
Optical waveguides
With optical coupler
Input/output coupler
G02B 626, G02B 636
Patent
active
051081679
ABSTRACT:
A laser signal coupling device one embodiment of which comprises a transmitter where a laser diode is coupled to a single mode fiber optic cable through the use of a lens whose position relative the diode is kept constant but whose length is adjusted to obtain a beam waist for the focused beam at some predefined point such as inside the end of the fiber optic cable. Such a positioning of the beam waist can increase the yield by reducing the effect of alignment variations in axial, radial and angular directions as well as reduce noise from fiber end surface reflections. The same concept may be used to accurately focus signaling received from an optic cable, in a surface of a signal detector. Further, the concept may be used for focusing between optic cable of different types such as converting from multi-mode to single-mode fiber optic cable.
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Kandpal Pramode
Moore Andrew
Morgan Peter J.
Wald Michael
Lutz Bruce C.
Rockwell International Corporation
Sewell V. Lawrence
Ullah Akm
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