Abstract

Optical injection induced gain modulation of a semiconductor optical amplifier (SOA) is demonstrated to equalize the peak intensity of pulses generating from the rational-harmonic-mode-locking (RHML) SOA based fiberized semiconductor laser. This is achieved by adjusting the temporal shape of the injected optical signal generated from a Mach-Zehnder intensity modulator, in which the DC biased level exceeding Vπ and the electrical pulse amplitude of 1.5Vπ are concurrently employed. Numerical simulation on the injected optical signal profile and the SOA gain during the inverse-optical-pulse injection induced gain modulation process are also demonstrated. After a peculiar inverse-optical-pulse injection, each pulse in the 5th-order RHML pulse-train experiences different gain from temporally varied SOA gain profile, leading the pulse peak to equalize one another with a minimum standard deviation of 2.5% on the peak intensity variation. The optimized 5th-order RHML pulse exhibits a signal-to-noise suppression ratio of 20 dB and a reduced variation on temporal spacing from 11 to 4 ps. The clock amplitude jitter is compress from 35.3% to 7.3%, which is less than the limitation up to 10% for 5th order RHML generation.

©2009 Optical Society of America

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References

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  1. E. Yoshida and M. Nakazawa, “80~200 GHz erbium doped fiber laser using a rational harmonic mode-locking technique,” Electron. Lett. 32, 1730–1732 (1996).
    [Crossref]
  2. G.-R. Lin, Y.-C. Chang, and J.-R. Wu, “Rational Harmonic mode-locking of Erbium-Doped Fiber Laser at 40 GHz Using a Loss-Modulated Fabry-perot Laser Diode,” IEEE Photon. Technol. Lett. 16, 1810–1812 (2004).
    [Crossref]
  3. G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
    [Crossref]
  4. G. Zhu, H. Chen, and N. Dutta, “Time domain analysis of a rational harmonic mode locked ring fiber laser,” J. Appl. Phys. 73, 2143–2147 (2001).
    [Crossref]
  5. Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
    [Crossref]
  6. S. Li and K. T. Chan, “Actively mode-locked erbium fiber ring laser using a Fabry-Perot semiconductor modulator as mode locker and tunable filter,” Appl. Phys. Lett. 74, 2737–2739 (1999).
    [Crossref]
  7. H. J. Lee, K. Kim, and H. G. Kim, “pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror,” Opt. Commun. 160, 51–56 (1996).
    [Crossref]
  8. M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
    [Crossref]
  9. Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
    [Crossref]
  10. Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
    [Crossref]
  11. Y. J. Kim, C. G. Lee, Y. Y. Chun, and C.-S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator,” Opt. Express 12, 907–915 (2004).
    [Crossref] [PubMed]
  12. C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
    [Crossref]
  13. X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
    [Crossref]
  14. S. Ozharar, S. Gee, F. Quinlan, S. Lee, and P. J. Delfyett, “Pulse-amplitude equalization by negative impulse modulation for rational harmonic mode-locking,” Opt. Lett. 31, 2924–2926 (2005).
    [Crossref]
  15. K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
    [Crossref]
  16. A. Hatziefremidis, G. Theophilopoulos, and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser,” Opt. Eng. 44, 0642061–3 (2005).
    [Crossref]
  17. G. -R. Lin, C. -K. Lee, and J. -J. Kang, “Rational harmonic mode-locking pulse quality of the dark-optical-comb injected semiconductor optical amplifier fiber ring laser,” Opt. Express,  16, 9213–9221, (2008).
    [Crossref] [PubMed]
  18. J. T. Verdeyen, Laser Electronic 2nd ed. (Prentice-Hall, Inc., USA, 1994), Chap. 9.
  19. W. W. Tang and C. Shu, “Optical Generation of Amplitude-Equalized Pulses From a Rational Harmonic Mode-Locked Fiber Laser Incorporating an SOA Loop Modulator,” IEEE Photon. Technol. Lett. 15, 2123 (2004).

2008 (1)

2005 (2)

S. Ozharar, S. Gee, F. Quinlan, S. Lee, and P. J. Delfyett, “Pulse-amplitude equalization by negative impulse modulation for rational harmonic mode-locking,” Opt. Lett. 31, 2924–2926 (2005).
[Crossref]

A. Hatziefremidis, G. Theophilopoulos, and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser,” Opt. Eng. 44, 0642061–3 (2005).
[Crossref]

2004 (6)

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
[Crossref]

Y. J. Kim, C. G. Lee, Y. Y. Chun, and C.-S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator,” Opt. Express 12, 907–915 (2004).
[Crossref] [PubMed]

G.-R. Lin, Y.-C. Chang, and J.-R. Wu, “Rational Harmonic mode-locking of Erbium-Doped Fiber Laser at 40 GHz Using a Loss-Modulated Fabry-perot Laser Diode,” IEEE Photon. Technol. Lett. 16, 1810–1812 (2004).
[Crossref]

G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
[Crossref]

W. W. Tang and C. Shu, “Optical Generation of Amplitude-Equalized Pulses From a Rational Harmonic Mode-Locked Fiber Laser Incorporating an SOA Loop Modulator,” IEEE Photon. Technol. Lett. 15, 2123 (2004).

2003 (1)

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

2002 (1)

C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
[Crossref]

2001 (2)

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

G. Zhu, H. Chen, and N. Dutta, “Time domain analysis of a rational harmonic mode locked ring fiber laser,” J. Appl. Phys. 73, 2143–2147 (2001).
[Crossref]

1999 (1)

S. Li and K. T. Chan, “Actively mode-locked erbium fiber ring laser using a Fabry-Perot semiconductor modulator as mode locker and tunable filter,” Appl. Phys. Lett. 74, 2737–2739 (1999).
[Crossref]

1998 (2)

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
[Crossref]

1996 (2)

E. Yoshida and M. Nakazawa, “80~200 GHz erbium doped fiber laser using a rational harmonic mode-locking technique,” Electron. Lett. 32, 1730–1732 (1996).
[Crossref]

H. J. Lee, K. Kim, and H. G. Kim, “pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror,” Opt. Commun. 160, 51–56 (1996).
[Crossref]

Ahn, J. T.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Avramopoulos, H.

K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
[Crossref]

Bintjas, C.

K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
[Crossref]

Chan, K. T.

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

S. Li and K. T. Chan, “Actively mode-locked erbium fiber ring laser using a Fabry-Perot semiconductor modulator as mode locker and tunable filter,” Appl. Phys. Lett. 74, 2737–2739 (1999).
[Crossref]

Chang, Y.-C.

G.-R. Lin, Y.-C. Chang, and J.-R. Wu, “Rational Harmonic mode-locking of Erbium-Doped Fiber Laser at 40 GHz Using a Loss-Modulated Fabry-perot Laser Diode,” IEEE Photon. Technol. Lett. 16, 1810–1812 (2004).
[Crossref]

Chen, H.

G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
[Crossref]

G. Zhu, H. Chen, and N. Dutta, “Time domain analysis of a rational harmonic mode locked ring fiber laser,” J. Appl. Phys. 73, 2143–2147 (2001).
[Crossref]

Chen, J. H.

Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
[Crossref]

Choa, F. S.

Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
[Crossref]

Choi, H. K.

C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
[Crossref]

Chun, Y. Y.

Chunliu, Z.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Delfyett, P. J.

Dong, H.

G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
[Crossref]

Dong, X.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Dutta, N.

G. Zhu, H. Chen, and N. Dutta, “Time domain analysis of a rational harmonic mode locked ring fiber laser,” J. Appl. Phys. 73, 2143–2147 (2001).
[Crossref]

Dutta, N. K.

G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
[Crossref]

Feng, X.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Gao, Y.

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

Gee, S.

Guiyun, K.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Hatziefremidis, A.

A. Hatziefremidis, G. Theophilopoulos, and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser,” Opt. Eng. 44, 0642061–3 (2005).
[Crossref]

Jeon, M. Y.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Kai, G.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Kang, J. -J.

Kim, H. G.

H. J. Lee, K. Kim, and H. G. Kim, “pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror,” Opt. Commun. 160, 51–56 (1996).
[Crossref]

Kim, H. Y.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Kim, K.

H. J. Lee, K. Kim, and H. G. Kim, “pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror,” Opt. Commun. 160, 51–56 (1996).
[Crossref]

Kim, K. H.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Kim, Y. J.

Y. J. Kim, C. G. Lee, Y. Y. Chun, and C.-S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator,” Opt. Express 12, 907–915 (2004).
[Crossref] [PubMed]

C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
[Crossref]

Lee, C. G.

Y. J. Kim, C. G. Lee, Y. Y. Chun, and C.-S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator,” Opt. Express 12, 907–915 (2004).
[Crossref] [PubMed]

C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
[Crossref]

Lee, C. -K.

Lee, E. H.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Lee, H. J.

H. J. Lee, K. Kim, and H. G. Kim, “pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror,” Opt. Commun. 160, 51–56 (1996).
[Crossref]

Lee, H. K.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Lee, S.

Li, S.

S. Li and K. T. Chan, “Actively mode-locked erbium fiber ring laser using a Fabry-Perot semiconductor modulator as mode locker and tunable filter,” Appl. Phys. Lett. 74, 2737–2739 (1999).
[Crossref]

Li, Y.

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

Li, Z.

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

Lim, D. S.

M. Y. Jeon, H. K. Lee, J. T. Ahn, D. S. Lim, H. Y. Kim, K. H. Kim, and E. H. Lee, “External fiber laser based pulse amplitude equalization scheme for rational harmonic mode locking in a ring-type fiber laser,” Electron. Lett. 34, 182–184 (1998).
[Crossref]

Lin, G. -R.

Lin, G.-R.

G.-R. Lin, Y.-C. Chang, and J.-R. Wu, “Rational Harmonic mode-locking of Erbium-Doped Fiber Laser at 40 GHz Using a Loss-Modulated Fabry-perot Laser Diode,” IEEE Photon. Technol. Lett. 16, 1810–1812 (2004).
[Crossref]

Liu, Y.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Lou, C.

Z. Li, C. Lou, K. T. Chan, Y. Li, and Y. Gao, “Theoretical and experimental study of pulse-amplitude-equalization in a rational harmonic mode-locked fiber ring laser,” IEEE J. Quantum Electron. 37, 33–37 (2001).
[Crossref]

Nakazawa, M.

E. Yoshida and M. Nakazawa, “80~200 GHz erbium doped fiber laser using a rational harmonic mode-locking technique,” Electron. Lett. 32, 1730–1732 (1996).
[Crossref]

Ozharar, S.

Park, C. -S.

C. G. Lee, Y. J. Kim, H. K. Choi, and C. -S. Park, “Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback,” Opt. Commun. 209, 417–425 (2002).
[Crossref]

Park, C.-S.

Pleros, N.

K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
[Crossref]

Qida, Z.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Quinlan, F.

Shiquan, Y.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Shu, C.

W. W. Tang and C. Shu, “Optical Generation of Amplitude-Equalized Pulses From a Rational Harmonic Mode-Locked Fiber Laser Incorporating an SOA Loop Modulator,” IEEE Photon. Technol. Lett. 15, 2123 (2004).

Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
[Crossref]

Shuzhong, Y.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Tang, W. W.

W. W. Tang and C. Shu, “Optical Generation of Amplitude-Equalized Pulses From a Rational Harmonic Mode-Locked Fiber Laser Incorporating an SOA Loop Modulator,” IEEE Photon. Technol. Lett. 15, 2123 (2004).

Theophilopoulos, G.

A. Hatziefremidis, G. Theophilopoulos, and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser,” Opt. Eng. 44, 0642061–3 (2005).
[Crossref]

Verdeyen, J. T.

J. T. Verdeyen, Laser Electronic 2nd ed. (Prentice-Hall, Inc., USA, 1994), Chap. 9.

Vlachos, K.

A. Hatziefremidis, G. Theophilopoulos, and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser,” Opt. Eng. 44, 0642061–3 (2005).
[Crossref]

K. Vlachos, C. Bintjas, N. Pleros, and H. Avramopoulos, “Ultrafast Semiconductor-Based Fiber Laser Sources,” IEEE J.Sel. Topics Quantum Electron. 10, 147–154 (2004).
[Crossref]

Wang, Q.

G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, “High-Quality Optical Pulse Train Generation at 80 Gb/s Using a Modified Regenerative-Type Mode-Locked Fiber Laser,” IEEE J. Quantum Electron. 40, 721–725 (2004).
[Crossref]

Wu, J.-R.

G.-R. Lin, Y.-C. Chang, and J.-R. Wu, “Rational Harmonic mode-locking of Erbium-Doped Fiber Laser at 40 GHz Using a Loss-Modulated Fabry-perot Laser Diode,” IEEE Photon. Technol. Lett. 16, 1810–1812 (2004).
[Crossref]

Xiaoyi, D.

Y. Shiquan, L. Zhaohui, Z. Chunliu, D. Xiaoyi, Y. Shuzhong, K. Guiyun, and Z. Qida, “Pulse-amplitude equalization in a rational harmonic mode-locked fiber ring laser by using modulator as both mode locker and equalizer,” IEEE Photon. Technol. Lett. 15, 389–391 (2003).
[Crossref]

Yoshida, E.

E. Yoshida and M. Nakazawa, “80~200 GHz erbium doped fiber laser using a rational harmonic mode-locking technique,” Electron. Lett. 32, 1730–1732 (1996).
[Crossref]

Yuan, S.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Zhang, W.

X. Feng, Y. Liu, S. Yuan, G. Kai, W. Zhang, and X. Dong, “Pulse-Amplitude Equalization in a Rational Harmonic Mode-Locked Fiber Laser Using Nonlinear Modulation,” IEEE Photon. Technol. Lett. 16, 1813–1815 (2004).
[Crossref]

Zhao, Y.

Y. Zhao, C. Shu, J. H. Chen, and F. S. Choa, “Wavelength tuning of 1/2-rational harmonically mode-locked pulses in a cavity-dispersive fiber laser,” Appl. Phys. Lett. 73, 3483–3485 (1998).
[Crossref]

Zhaohui, L.

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Figures (10)

Fig. 1
Fig. 1 System setup. EAMP; electrical power amplifier; COMB: comb generator; EATTN: electrical attenuator; MZM: Mach-Zehnder modulator; EDFA: Erbium-doped fiber amplifier; OC: optical coupler; ISO: optical isolator; WDM: wavelength-division multiplexer; SOA: semiconductor optical amplifier; PC: polarization controller.
Fig. 2.
Fig. 2. Mode-locking FSL pulsewidth and intra-cavity power as a function of coupling ratio.
Fig. 3 (a)
Fig. 3 (a) Illustration of the inverse-optical-pulse and the peculiar inverse-optical-pulse generated by MZM. (b) The transmission curve of MZM. (c) The variations of electrical comb with different driving intensity. (d) The profile of actual-optical -pulse with pulse-amplitude equalization.
Fig. 4.
Fig. 4. (a) Simulated profile of the electrical comb without (dash line) and with (solid line) pulse-amplitude equalization. (b) Simulated profiles of the inverse-optical-pulse (dash line) and peculiar inverse-optical-pulse (solid line). (c) Simulated gain profiles of SOA ring cavity without (dash line) and with (solid line) pulse-amplitude equalization. (d) Simulated inequivalent (dash line) and equivalent (solid line) pulse-amplitude of RHML via optical gain shaping method.
Fig. 5.
Fig. 5. The 3rd order RHML trace monitored on digital sampling oscilloscope (a) without (b) with pulse-amplitude equalization.
Fig. 6.
Fig. 6. Measured RF spectra of 3rd order RHML pulse train from RHML-FSL (a) without (b) with pulse-amplitude equalization.
Fig. 7.
Fig. 7. The 5th order RHML trace monitored on digital sampling oscilloscope (a) without (b) with pulse-amplitude equalization.
Fig. 8.
Fig. 8. Measured RF spectra of 5th order RHML pulse train from RHML-FSL (a) without (b) with pulse-amplitude equalization.
Fig. 9.
Fig. 9. The percentage error of pulse-repetition period without and with pulse-amplitude equalization.
Fig. 10.
Fig. 10. Clock amplitude jitter versus RHML order for the FSL without and with pulse-amplitude equalization.

Equations (5)

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τp=2In2π (2g0δ2)1/4 1(fmΔv)1/2 ,
Iout=Iin2{1+sin[π(Vin+VDC)Vπ]}
=Iin2{1+sin[π(n=Vπ2(1e(tnt0)2τ02)+Vπ2)/Vπ]},
=Iin2{1sin[π(n=Vπ2(1e(tnt0)2τ02))/Vπ]}
Iout=Iin2{1+sin[π(n=1.2Vπ(1(e(tnt0τ)2τ02U(τ)eττ1dτ))+1.2Vπ)/Vπ]},

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