Coupling method for coupling high power optical beams into...

Details Coupling method for coupling high power optical beams into... Coupling method for coupling high power optical beams into...

2007-09-04

2007-09-04

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By alignment in lateral direction

Reexamination Certificate

active

11154316

ABSTRACT:
A method for determining an improved alignment to couple a beam having a high power level into a waveguide. The power of the beam is reduced to a minimum test power level. The reduced-power beam is aligned in a test alignment such that it forms a beam spot on the coupling surface of the waveguide. The coupled power level of the coupled portion of the beam is measured. The power level of the reduced-power beam is increased in steps to a maximum test power level. Corresponding coupled power levels for each power level are measured. If the coupled power level does not saturate and the corresponding coupling efficiency is greater than or equal to the desired coupling efficiency, the current test alignment is determined to be the improved alignment. Otherwise, the test alignment is changed and the new test alignment is tested to see whether it meets the desired standards.

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