Abstract

A new type of launching coupler for small-bore, hollow fibers, consisting of a lens and a tapered hollow waveguide, is proposed to increase the alignment tolerance between an input laser beam and small bore fibers. First, we designed the structural dimensions of the coupler by using a ray-tracing method. Then, a series of experiments employing tapered hollow waveguides made of Pyrex glass was performed to investigate the effectiveness of the new coupler. It is shown that the coupler has a high efficiency with attenuation of around 0.5 dB, especially when the inside of the taper section is coated with a polymer and silver film. In addition, we also show that the coupler has great tolerance for the transverse displacement of a waveguide axis, which gives a 0.1-dB loss increase for a 300-µm displacement.

© 1997 Optical Society of America

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References

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  1. Y. Matsuura, M. Miyagi, “Hollow fiber beam delivery systems,” in Proceedings of the 11th International Symposium on Gas Flow and Chemical Lasers & High Power Laser Conference (SPIE Press, Bellingham, Wash., 1996).
  2. J. A. Harrington, ed., Selected Papers on Infrared Fiber Optics, Vol. MS09 of SPIE Milestone Series (SPIE Press, Bellingham, Wash., 1990).
  3. Y. Matsuura, T. Abel, J. A. Harrington, “Optical properties of small-bore hollow glass waveguides,” Appl. Opt. 34, 6842–6847 (1995).
    [CrossRef] [PubMed]
  4. Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
    [CrossRef]
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    [CrossRef] [PubMed]
  6. T. Tamir, ed., Guided-Wave Optoelectronics (Springer-Verlag, New York, 1988).
    [CrossRef]
  7. J. P. Crenn, “Gaussian beam transmission through circular waveguides with conducting wall material,” Appl. Opt. 24, 3648–3658 (1985).
    [CrossRef] [PubMed]
  8. D. Mendlovic, E. Goldenberg, S. Ruschin, J. Dror, N. Croitoru, “Ray model for transmission of metallic-dielectric hollow bent cylindrical waveguides,” Appl. Opt. 28, 708–712 (1989).
    [CrossRef] [PubMed]
  9. E. D. Palik, ed., Handbook of Optical Constants of Solids (Academic, Orlando, Fla., 1985).
  10. D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
    [CrossRef]
  11. Y. Wang, A. Hongo, Y. Kato, M. Miyagi, T. Shimomura, D. Miura, “Thickness and uniformity of fluorocarbon polymer film dynamically coated inside silver hollow glass waveguides,” Appl. Opt. 36, 2886–2892 (1997).
    [CrossRef] [PubMed]

1997

1996

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

1995

1990

1989

1985

1977

D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
[CrossRef]

Abel, T.

Crenn, J. P.

Croitoru, N.

Dror, J.

Gannot, I.

Goldenberg, E.

Gorton, E. K.

D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
[CrossRef]

Hall, D. R.

D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
[CrossRef]

Harrington, J. A.

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

Y. Matsuura, T. Abel, J. A. Harrington, “Optical properties of small-bore hollow glass waveguides,” Appl. Opt. 34, 6842–6847 (1995).
[CrossRef] [PubMed]

Hongo, A.

Jenkins, R. M.

D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
[CrossRef]

Kato, Y.

Matsuura, K.

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

Matsuura, Y.

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

Y. Matsuura, T. Abel, J. A. Harrington, “Optical properties of small-bore hollow glass waveguides,” Appl. Opt. 34, 6842–6847 (1995).
[CrossRef] [PubMed]

Y. Matsuura, M. Miyagi, “Hollow fiber beam delivery systems,” in Proceedings of the 11th International Symposium on Gas Flow and Chemical Lasers & High Power Laser Conference (SPIE Press, Bellingham, Wash., 1996).

Mendlovic, D.

Miura, D.

Miyagi, M.

Y. Wang, A. Hongo, Y. Kato, M. Miyagi, T. Shimomura, D. Miura, “Thickness and uniformity of fluorocarbon polymer film dynamically coated inside silver hollow glass waveguides,” Appl. Opt. 36, 2886–2892 (1997).
[CrossRef] [PubMed]

Y. Matsuura, M. Miyagi, “Hollow fiber beam delivery systems,” in Proceedings of the 11th International Symposium on Gas Flow and Chemical Lasers & High Power Laser Conference (SPIE Press, Bellingham, Wash., 1996).

Rabii, C. D.

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

Ruschin, S.

Shimomura, T.

Wang, Y.

Appl. Opt.

Electron. Lett.

Y. Matsuura, C. D. Rabii, K. Matsuura, J. A. Harrington, “Low order multimode generation in hollow glass waveguides,” Electron. Lett. 32, 1096–1099 (1996).
[CrossRef]

J. Appl. Phys.

D. R. Hall, E. K. Gorton, R. M. Jenkins, “10-µm propagation losses in hollow dielectric waveguides,” J. Appl. Phys. 48, 1212–1216 (1977).
[CrossRef]

Other

T. Tamir, ed., Guided-Wave Optoelectronics (Springer-Verlag, New York, 1988).
[CrossRef]

E. D. Palik, ed., Handbook of Optical Constants of Solids (Academic, Orlando, Fla., 1985).

Y. Matsuura, M. Miyagi, “Hollow fiber beam delivery systems,” in Proceedings of the 11th International Symposium on Gas Flow and Chemical Lasers & High Power Laser Conference (SPIE Press, Bellingham, Wash., 1996).

J. A. Harrington, ed., Selected Papers on Infrared Fiber Optics, Vol. MS09 of SPIE Milestone Series (SPIE Press, Bellingham, Wash., 1990).

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Figures (4)

Fig. 1
Fig. 1

Schematic view of a launching coupler composed of a lens and a tapered waveguide.

Fig. 2
Fig. 2

Calculated attenuation of launching couplers with a tapered waveguide. For a polymer/Ag-coated waveguide, we assumed a refractive index of 1.5 and a thickness of 1.44 µm.

Fig. 3
Fig. 3

Measured attenuation of launching couplers with and without a Pyrex glass taper.

Fig. 4
Fig. 4

Measured attenuation of a launching coupler with a taper waveguide that is coated with silver and FCP film.

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