Abstract

We report the fabrication of a highly multi-mode square core jacketed air-clad fiber with a top-hat near-field intensity profile. Using this fiber to deliver Q-switched pulses at 1 μm we have successfully produced square shaped ablation marks in indium tin oxide (ITO) without the use of complex beam shaping optics.

© 2006 Optical Society of America

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References

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  1. For example, see http://www.ceramoptec.com/ and http://www.innovaquartz.com/
  2. http://www.crystal-fibre.com/products/passive_hna.shtm
  3. W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
    [CrossRef]
  4. NaderA. Issa, "High numerical aperture in multimode microstructured optical fibers," Appl. Opt. 436191 - 6197 (2004)
    [CrossRef] [PubMed]
  5. http://www.corning.com/docs/opticalfiber/wp5053_07-01.pdf
  6. http://www.ino.ca/En/Notre_offre/Micro-usinage_laser/realisations/Clivage_fibres_optiques.aspx

2004 (2)

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

NaderA. Issa, "High numerical aperture in multimode microstructured optical fibers," Appl. Opt. 436191 - 6197 (2004)
[CrossRef] [PubMed]

Birks, T.A.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Bouwmans, G.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Hedley, T.D.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Knight, J.C.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Nader,

Percival, R.M.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Russell, P.St.J.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Wadsworth, W.J.

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Appl. Opt. (1)

IEEE. Photonics. Technol. Lett. (1)

W.J. Wadsworth, R.M. Percival, G. Bouwmans, J.C. Knight, T.A. Birks, T.D. Hedley and P.St.J. Russell, "Very high numerical aperture Fibers," IEEE. Photonics. Technol. Lett. 16843 - 845 (2004).
[CrossRef]

Other (4)

http://www.corning.com/docs/opticalfiber/wp5053_07-01.pdf

http://www.ino.ca/En/Notre_offre/Micro-usinage_laser/realisations/Clivage_fibres_optiques.aspx

For example, see http://www.ceramoptec.com/ and http://www.innovaquartz.com/

http://www.crystal-fibre.com/products/passive_hna.shtm

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Figures (6)

Fig. 1.
Fig. 1.

Scanning electron microscope (SEM) image of a JAC fiber fabricated at the ORC with a core > 600 μm in diameter. (a) shows the whole fiber and (b) shows a close up of the cladding region. (c) SEM image of a square core silica fiber with a core width of ∼ 150 μm (polymer coating not shown). Photograph courtesy of SPI Lasers UK Ltd.

Fig. 2.
Fig. 2.

(a) Schematic drawing of JAC fiber design with D = 0.74 mm and a core size of 400 x 400 μm. (b) Stacking geometry of JAC core

Fig. 3.
Fig. 3.

(a) Optical image of the square-core JAC fiber, (b) SEM image showing the cladding air holes in detail.

Fig. 4.
Fig. 4.

Near field intensities of the square core fiber at (a) 633 nm, (b) 1.06 μm and (c) 915 nm

Fig. 5.
Fig. 5.

Beam width (dB) vs. distance from fiber end (z) for single-mode illumination at 633 nm and 1.06 μm. Inset shows far-field output for white light illumination.

Fig. 6.
Fig. 6.

(a) Schematic of the system used in ablation trials. (b) Features ablated in an ITO film using the system illustrated in (a) with dL = 50 mm. Average power at fiber input and ITO surface = 6.1 and 3.0W respectively, corresponding to a fluence of 6.5 Jcm-2 at the ITO surface.

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