Fiber optic probe and method of making same

Details Fiber optic probe and method of making same Fiber optic probe and method of making same

1993-07-15

1995-04-25

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250306, 25022711, H01J 516, H01J 4014

Patent

active

054101514

ABSTRACT:
A fiber optic probe is disclosed for use as a signal collector and illuminator in Near Field Scanning Microscopy (NSOM) and Photon Scanning Tunneling Microscopy (PSTM) and the like. The tip of the probe is designed to reduce local mode coupling in favor of optical scattering as the primary signal transduction mechanism in order to maximize resolution. The optical fiber used is of sufficient numerical aperture to allow efficient capture and transfer to a detector of photons scattered at the probe tip. Further, the rate of taper between the probe tip and the transmission fiber is controlled to minimize signal loss in the transition as well as to minimize signal loss when the probe is used as an illumination source.

REFERENCES:
patent: 4604520 (1986-08-01), Pohl
patent: 4725727 (1988-02-01), Harder et al.
patent: 5105305 (1992-04-01), Betzig et al.
patent: 5294790 (1994-03-01), Ohta
patent: 5340981 (1994-08-01), De Fornel
patent: 5343460 (1994-08-01), Miyazaki

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