Patent ID: 11965831
Assignee: THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE
Field: Measurement (Instruments)
Classification: CPC G  A | IPC G

Claim 8:
9. The method of claim 1, wherein propagating depletion radiation of the fluorescence depletion wavelength comprises providing depletion radiation from a source of depletion and coupling the depletion radiation into the one or more peripheral modes of the fiber, and wherein coupling the depletion radiation into the one or more peripheral modes of the fiber comprises
shaping the radiation into a profile having an intensity minimum in a central portion thereof;
separating the shaped radiation into two beams having orthogonal polarizations;
rotating the intensity profile of first one of the beams by about 90 degrees with respect to the other beam and delaying the first one of the beams with respect to the other beam;
recombining the beams; and
coupling the recombined beam into the one or more peripheral modes of the fiber.