Abstract

We demonstrate active shaping of the driving electrical pulses to a laser diode in order to compensate for the pulse shaping effects of gain saturation in an Yb doped fiber amplifier cascade and to allow the generation of user defined customized output pulse shapes. In particular we demonstrate the generation of square output pulses, which have the potential to significantly increase the maximum pulse energy extractable from an amplifier before the peak power reaches the threshold for SRS, and for high efficiency frequency conversion.

© 2006 Optical Society of America

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  1. M. von Allmen and A. Blatter, Laser-Beam Interactions with Materials (Springer, 1995).
    [CrossRef]
  2. A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
    [CrossRef]
  3. B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
    [CrossRef]
  4. T. Chen and R.B. Darling, "Parametric studies on pulsed near ultraviolet frequency tripled Nd:YAG laser micromachining of sapphire and silicon," J. Mater. Process. Technol. 169, 214-218 (2005).
    [CrossRef]
  5. F. Ghiringhelli, K. Vysniauskas, L. M. B. Hickey, M. N. Zervas, A. Malinowski, D. J. Richardson, in Proceedings of CLEO Europe, Munich ICM, International Congress Centre, Munich, Germany 12-17 June 2005.
  6. A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
    [CrossRef]
  7. J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
    [CrossRef]
  8. M.Y. Cheng, Y.C. Chang, A. Galvanauskas, P. Mamidipudi, R. Changkakoti, P. Gatchell, "High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-mu m core highly multimode Yb-doped fiber amplifiers," Opt. Lett. 30, 358-360, (2005).
    [CrossRef] [PubMed]
  9. C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
    [CrossRef]
  10. L. M. Franz, J. S. Nodvik, "Theory of Pulse Propagation in a Laser Amplifier," J. Appl. Phys. 34, 2346-2349 (1963).
    [CrossRef]
  11. R.G. Smith "Optical power handling capacity of low loss optical fibers as determined by stimulated Raman and Brillouin scattering," Appl. Opt. 11, 2489-2494, (1972).
    [CrossRef] [PubMed]
  12. A.P. Liu, M.A. Norsen, R.D. Mead, "60-W green output by frequency doubling of a polarized Yb-doped fiber laser," Opt. Lett. 30, 67-69, (2005).
    [CrossRef] [PubMed]
  13. A. B. Grudinin, J. Nilsson, P. W. Turner, in Proceedings of CLEO Europe, Nice, France. 10-15th Sept 2000.
  14. S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
    [CrossRef] [PubMed]

2006 (1)

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

2005 (3)

2004 (1)

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

2002 (1)

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

2000 (1)

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

1999 (1)

A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
[CrossRef]

1983 (1)

S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
[CrossRef] [PubMed]

1972 (1)

1963 (1)

L. M. Franz, J. S. Nodvik, "Theory of Pulse Propagation in a Laser Amplifier," J. Appl. Phys. 34, 2346-2349 (1963).
[CrossRef]

Chang, Y.C.

Changkakoti, R.

Chen, T.

T. Chen and R.B. Darling, "Parametric studies on pulsed near ultraviolet frequency tripled Nd:YAG laser micromachining of sapphire and silicon," J. Mater. Process. Technol. 169, 214-218 (2005).
[CrossRef]

Cheng, M.Y.

Codemard, C.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Darling, R.B.

T. Chen and R.B. Darling, "Parametric studies on pulsed near ultraviolet frequency tripled Nd:YAG laser micromachining of sapphire and silicon," J. Mater. Process. Technol. 169, 214-218 (2005).
[CrossRef]

Dupriez, P.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Farrell, C.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Franz, L. M.

L. M. Franz, J. S. Nodvik, "Theory of Pulse Propagation in a Laser Amplifier," J. Appl. Phys. 34, 2346-2349 (1963).
[CrossRef]

Furusawa, K.

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

Galvanauskas, A.

Gatchell, P.

Gelatt, C. D.

S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
[CrossRef] [PubMed]

Hansen, T.N.

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

Hofer, S.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Kirkpatrick, S.

S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
[CrossRef] [PubMed]

Knoke, S.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Liem, A.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Limpert, J.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Liu, A.P.

Lunney, J.G.

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

Malinowski, A.

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

Mamidipudi, P.

Mead, R.D.

Misra, A.

A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
[CrossRef]

Mitra, A.

A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
[CrossRef]

Nilsson, J.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Nodvik, J. S.

L. M. Franz, J. S. Nodvik, "Theory of Pulse Propagation in a Laser Amplifier," J. Appl. Phys. 34, 2346-2349 (1963).
[CrossRef]

Norsen, M.A.

Philippov, V.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Piper, A.

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

Richardson, D.J.

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

Sahu, J.K.

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Schou, J.

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

Smith, R.G.

Thareja, R.K.

A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
[CrossRef]

Toftmann, B.

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

Tunnermann, A.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Vecchi, M. P.

S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
[CrossRef] [PubMed]

Voelckel, H.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Zellmer, H.

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Appl. Opt. (1)

Appl. Phys. B (1)

J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann, S. Knoke, H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier," Appl. Phys. B 75, 477-479 (2002).
[CrossRef]

Appl. Phys. Lett. (1)

A. Misra, A. Mitra, R.K. Thareja, "Diagnostics of laser ablated plasmas using fast photograph," Appl. Phys. Lett. 74, 929-931, (1999).
[CrossRef]

C. R. Phys. (1)

C. Codemard, C. Farrell, P. Dupriez, V. Philippov, J.K. Sahu, J. Nilsson, "Millijoule, high-peak power, narrow-linewidth, sub-hundred nanosecond pulsed fibre Master-Oscillator Power-Amplifier at 1.55 mu m," C. R. Phys. 7, 170-176, (2006).
[CrossRef]

Electron. Lett. (1)

A. Piper, A. Malinowski, K. Furusawa, D.J. Richardson, "High-power high-brightness mJ Q-switched ytterbium-doped fibre laser," Electron. Lett. 40, 928-929, (2004).
[CrossRef]

J. Appl. Phys. (1)

L. M. Franz, J. S. Nodvik, "Theory of Pulse Propagation in a Laser Amplifier," J. Appl. Phys. 34, 2346-2349 (1963).
[CrossRef]

J. Mater. Process. Technol. (1)

T. Chen and R.B. Darling, "Parametric studies on pulsed near ultraviolet frequency tripled Nd:YAG laser micromachining of sapphire and silicon," J. Mater. Process. Technol. 169, 214-218 (2005).
[CrossRef]

Opt. Lett. (2)

Phys. Rev. Let. (1)

B. Toftmann, J. Schou, T.N. Hansen, J.G. Lunney,"Angular Distribition of Electron Temperature and Density in a Laser-Ablation Plume," Phys. Rev. Let. 84, 3998-4001, (2000).
[CrossRef]

Science (1)

S. Kirkpatrick, C. D. Gelatt, Jr., M. P. Vecchi, "Optimization by Simulated Annealing," Science 220, 671-680, (1983).
[CrossRef] [PubMed]

Other (3)

A. B. Grudinin, J. Nilsson, P. W. Turner, in Proceedings of CLEO Europe, Nice, France. 10-15th Sept 2000.

F. Ghiringhelli, K. Vysniauskas, L. M. B. Hickey, M. N. Zervas, A. Malinowski, D. J. Richardson, in Proceedings of CLEO Europe, Munich ICM, International Congress Centre, Munich, Germany 12-17 June 2005.

M. von Allmen and A. Blatter, Laser-Beam Interactions with Materials (Springer, 1995).
[CrossRef]

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Figures (4)

Fig. 1.
Fig. 1.

Schematic of active pulse shaping system

Fig. 2.
Fig. 2.

(a) square signal from AWG and corresponding optical output of diode, (b) corresponding optical output from MOPA at various pump power levels. The ringing on the pulse is due to non-ideal impedance matching of the current driver and laser and could be largely eliminated with improved design.

Fig.3.
Fig.3.

(a) input electrical signal (dotted) and diode output pulses, (b) target pulse (dotted) and MOPA output (solid), comparison pulses (dashed) produced with square driving pulse.

Fig. 4.
Fig. 4.

Applied signal (dotted), diode output (solid green), target pulses (dashed) and MOPA output (solid blue) for triangular and 2-step pulses

Equations (1)

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y = L + 1 L e α T ( e α ( t T ) 1 )

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