Abstract

We describe the use of single-mode fibers to deliver moderate-power Nd:YAG light for precision machining at peak powers of approximately 225 W in 0.1-ms pulses. An example application is demonstrated: the cutting of 0.05- and 0.2-mm-thick stainless steel sheet with kerf widths and feature sizes as small as 30 μm.

© 1998 Optical Society of America

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References

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  1. D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
    [CrossRef]
  2. J. M. Senior, Optical Fiber Communications: Principles and Practice (Prentice-Hall, Englewood Cliffs, N.J., 1985), Ch. 2.
  3. A. E. Siegman, “New developments in laser resonators,” in Optical ResonatorsD. A. Holmes, ed., Proc. SPIE1224, 2–14 (1990).
    [CrossRef]
  4. S. W. Allison, G. T. Gillies, D. W. Magnuson, T. S. Pagano, “Pulsed laser damage to optical fibers,” Appl. Opt. 24, 3140–3145 (1985).
    [CrossRef] [PubMed]
  5. Certified Refractive Index Liquids Series A, manufactured by Cargille Laboratories, Inc., Cedar Grove, N.J.
  6. E. Brucher, R. Huber, R. Iffländer, “Lichtleiteranordnung für Laserstrahlen,” German Patent DE4305313C1 (31March1994).
  7. G. P. Agrawal, Nonlinear Fiber Optics (Academic, New York, 1989), Chaps. 8 and 9.
  8. D. P. Hand, P. St. J. Russell, “Solitary thermal shock waves and optical damage in optical fibers: the fiber fuse,” Opt. Lett. 13, 767–769 (1988).
    [CrossRef] [PubMed]

1996 (1)

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

1988 (1)

1985 (1)

Agrawal, G. P.

G. P. Agrawal, Nonlinear Fiber Optics (Academic, New York, 1989), Chaps. 8 and 9.

Allison, S. W.

Brucher, E.

E. Brucher, R. Huber, R. Iffländer, “Lichtleiteranordnung für Laserstrahlen,” German Patent DE4305313C1 (31March1994).

Gillies, G. T.

Hand, D. P.

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

D. P. Hand, P. St. J. Russell, “Solitary thermal shock waves and optical damage in optical fibers: the fiber fuse,” Opt. Lett. 13, 767–769 (1988).
[CrossRef] [PubMed]

Huber, R.

E. Brucher, R. Huber, R. Iffländer, “Lichtleiteranordnung für Laserstrahlen,” German Patent DE4305313C1 (31March1994).

Iffländer, R.

E. Brucher, R. Huber, R. Iffländer, “Lichtleiteranordnung für Laserstrahlen,” German Patent DE4305313C1 (31March1994).

Jones, J. D. C.

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

Magnuson, D. W.

Naeem, M.

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

Pagano, T. S.

Russell, P. St. J.

Senior, J. M.

J. M. Senior, Optical Fiber Communications: Principles and Practice (Prentice-Hall, Englewood Cliffs, N.J., 1985), Ch. 2.

Siegman, A. E.

A. E. Siegman, “New developments in laser resonators,” in Optical ResonatorsD. A. Holmes, ed., Proc. SPIE1224, 2–14 (1990).
[CrossRef]

Su, D.

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

Appl. Opt. (1)

Opt. Eng. (1)

D. P. Hand, D. Su, M. Naeem, J. D. C. Jones, “Fibre optic high quality Nd:YAG beam delivery for materials processing,” Opt. Eng. 35, 502–506 (1996).
[CrossRef]

Opt. Lett. (1)

Other (5)

J. M. Senior, Optical Fiber Communications: Principles and Practice (Prentice-Hall, Englewood Cliffs, N.J., 1985), Ch. 2.

A. E. Siegman, “New developments in laser resonators,” in Optical ResonatorsD. A. Holmes, ed., Proc. SPIE1224, 2–14 (1990).
[CrossRef]

Certified Refractive Index Liquids Series A, manufactured by Cargille Laboratories, Inc., Cedar Grove, N.J.

E. Brucher, R. Huber, R. Iffländer, “Lichtleiteranordnung für Laserstrahlen,” German Patent DE4305313C1 (31March1994).

G. P. Agrawal, Nonlinear Fiber Optics (Academic, New York, 1989), Chaps. 8 and 9.

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Figures (7)

Fig. 1
Fig. 1

Single-mode fiber beam delivery: experimental arrangement.

Fig. 2
Fig. 2

Laser-pulse output from the fiber detected with both a silicon photodiode and an InGaAs photodiode. The difference gives an indication of the level of the stimulated Raman scattering.

Fig. 3
Fig. 3

Nonlinear backscatter detected at D3.

Fig. 4
Fig. 4

Spectrum of light output from a 20-m fiber length.

Fig. 5
Fig. 5

Single-mode fiber laser cutting: experimental arrangement.

Fig. 6
Fig. 6

Micrograph of a slot cut in a 200-μm-thick sheet with pulsed light transmitted through a single-mode fiber.

Fig. 7
Fig. 7

Micrograph of a slot cut in a 50-μm-thick stainless steel sheet with pulsed light transmitted through a single-mode fiber.

Equations (1)

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g R P 0 cr L A eff 16 ,

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