Toward a near-field optical array

Review of Scientific Instruments

Volumn 68, Issue 3, 1997, Pages 1357-1359

  Pantano, Paul ^a,b   Walt, David R ^a  

^a TUFTS UNIVERSITY   (United States)

^b UNIVERSITY OF TEXAS AT DALLAS   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001524727     PISSN: 00346748     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1147941     Document Type: Article

References (31)

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15. Scanning electron microscopy was performed with a Jeol SM 840 scanning electron microscope (Peabody, MA) at an operating voltage of 15 kV. Distal imaging-fiber faces were mounted on an aluminum stub, and except where noted otherwise, sputter coated with <10nm of gold to minimize charging.
16. The ∼6000 optical fibers were fused together in an ∼15 μm thick silica jacket coated with an ∼25 μm thick layer of silicone resin in order to preserve mechanical strength; as a result, the total diameter of the imaging fiber was ∼350 μm.
17. In order to minimize cross-talk, the individual optical fibers in this imaging fiber are not aligned precisely, this manufacturing technique is called the disordered pack method [see M. Mogi and K. Yoshimura, Proc. Soc. Photo-Opt. Instrum. Eng. 1067, 172 (1989)].
18. Near-field optical array fabrication begins by successive polishing of the distal face of an imaging fiber (Sumitomo Electric Industries, Torrance, CA) with 30, 15, 3, and 0.3 μm lapping films (General Fiber Optics, Fairfield, NJ). Residual polishing material was removed by sonicating the imaging fiber in water for 30 s. The distal face of the imaging fiber was submerged at a right angle into a 700 μl solution comprising 100 μl hydrofluoric acid (50%), 500 μl ammonium fluoride (40%), and 100 μl deionized water for a set period of time at room temperature (see Ref. 10). Caution: Hydrofluoric acid is extremely corrosive. In general, the silicone resin was not removed before the etching procedure since it could protect the 270 μm diameter silica jacket from the etchant. Finally, all imaging fibers were rinsed and sonicated thoroughly in water before analysis.
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