G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/42 (2006.01) G02B 6/28 (2006.01)
Patent
CA 2055491
RYN015-PCT Abstract A coupler for a fiber optic light waveguide has phase space matching optics to increase coupling efficiency. The acceptance phase space of the fiber optic waveguide has two components for light in two orthogonal planes. One of the phase space plots has a straight spine and the other has a bent spine. The phase space matching optics include a graded index lens optically coupled to the phase of a light emitting diode, in the case of a write coupler, which alters the emitted light phase space at a reference plane of the emitted light to match, at the reference plane, the acceptance phase space component having the straight spine. Another lens takes the output light from the graded index lens and alters the phase space further to match the phase space component having the bent spine. Also disclosed is a method for measuring phase space and a system using write and read couplers and a pair of buses for bidirectional communication of information between a plurality of users and a central facility such a telephone central switching office.
Link William Trevor
Uken William David
Ericsson Raynet
Marks & Clerk
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