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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 6 — Jun. 1, 2012
  • pp: 1479–1485

Experimental investigation on a Q -switched, mode-locked fiber laser based on the combination of active mode locking and passive Q switching

Junsu Lee, Joonhoi Koo, You Min Chang, Pulak Debnath, Yong-Won Song, and Ju Han Lee  »View Author Affiliations

JOSA B, Vol. 29, Issue 6, pp. 1479-1485 (2012)

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We performed an experimental investigation on a Q-switched, mode-locked laser based on the combination of passive Q switching and active mode locking. This study was carried out using an erbium fiber ring laser incorporating an active mode locker employing a fast Si-based variable optical attenuator and a passive Q switch based on a carbon nanotube saturable absorber. It was found that stable Q-switched, mode-locked pulses can be readily generated when using a particular cavity modulation index and pump power. It was also found that our scheme can easily alter the operating regime among the Q switching, Q-switched mode locking, and mode locking by simply controlling the cavity modulation index and/or the pump power. For this particular laser configuration, the cavity modulation index and pump power operating conditions have been experimentally analyzed for three laser operating regimes.

© 2012 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.4050) Lasers and laser optics : Mode-locked lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 26, 2012
Revised Manuscript: March 22, 2012
Manuscript Accepted: March 22, 2012
Published: June 1, 2012

Junsu Lee, Joonhoi Koo, You Min Chang, Pulak Debnath, Yong-Won Song, and Ju Han Lee, "Experimental investigation on a Q-switched, mode-locked fiber laser based on the combination of active mode locking and passive Q switching," J. Opt. Soc. Am. B 29, 1479-1485 (2012)

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  1. E. Yoshida, N. Shimizu, and M. Nakazawa, “A 40 GHz 0.9 ps regeneratively mode-locked fiber laser with a tuning range of 1530–156 nm,” IEEE Photon. Technol. Lett. 11, 1587–1589 (1999). [CrossRef]
  2. H. D. Lee, J. H. Lee, M. Y. Jeong, and C. S. Kim, “Characterization of wavelength-swept active mode locking fiber laser based on reflective semiconductor optical amplifier,” Opt. Express 19, 14586–14593 (2011). [CrossRef]
  3. C. B. Schaffer, A. Brodeur, J. F. García, and E. Mazur, “Micromachining bulk glass by use of femtosecond laser pulses with nanojoule energy,” Opt. Lett. 26, 93–95 (2001). [CrossRef]
  4. R. Paschotta, R. Häring, E. Gini, H. Melchior, U. Keller, H. L. Offerhaus, and D. J. Richardson, “Passively Q-switched 0.1 mJ fiber laser system at 1.53 μm,” Opt. Lett. 24, 388–390 (1999). [CrossRef]
  5. Z. J. Chen, A. B. Grudinin, J. Porta, and D. Minelly, “Enhanced Q switching in double-clad fiber lasers,” Opt. Lett. 23, 454–456 (1998). [CrossRef]
  6. S. Y. Set, H. Yaguchi, Y. Tanaka, and M. Jablonski, “Laser mode locking using a saturable absorber incorporating carbon nanotubes,” J. Lightwave Technol. 22, 51–56 (2004). [CrossRef]
  7. H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995). [CrossRef]
  8. P. K. Datta, S. Mukhopadhyay, S. K. Das, L. Tartara, A. Agnesi, and V. Degiogio, “Enhancement of stability and efficiency of a nonlinear mirror mode-locked Nd:YVO4 oscillator by an active Q-switch,” Opt. Express 12, 4041–4046 (2004). [CrossRef]
  9. S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010). [CrossRef]
  10. M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008). [CrossRef]
  11. C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008). [CrossRef]
  12. C. Cuadrado-Laborde, A. Díez, J. L. Cruz, and M. V. Andrés, “Doubly active Q switching and mode locking of an all-fiber laser,” Opt. Lett. 34, 2709–2711 (2009). [CrossRef]
  13. Y. M. Chang, J. Lee, and J. H. Lee, “A Q-switched, mode-locked fiber laser employing subharmonic cavity modulation,” Opt. Express 19, 26627–26633 (2011). [CrossRef]
  14. N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992). [CrossRef]
  15. S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010). [CrossRef]
  16. Y.-W. Song, S. Yamashita, C. S. Goh, and S. Y. Set, “Carbon nanotube mode lockers with enhanced nonlinearity via evanescent field interaction in D-shaped fibers,” Opt. Lett. 32, 148–150 (2007). [CrossRef]
  17. F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).
  18. Y. M. Chang, J. Lee, Y. M. Jhon, and J. H. Lee, “Active Q-switching in an erbium-doped fiber laser using an ultrafast silicon-based variable optical attenuator,” Opt. Express 19, 26911–26916 (2011). [CrossRef]
  19. D. W. Zheng, B. T. Smith, and M. Asghari, “Improved efficiency Si-photonic attenuator,” Opt. Express 16, 16754–16765 (2008). [CrossRef]
  20. S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).
  21. B. Dong, J. Hu, C.-Y. Liaw, J. Hao, and C. Yu, “Wideband-tunable nanotube Q-switched low threshold erbium doped fiber laser,” Appl. Opt. 50, 1442–1445 (2011). [CrossRef]
  22. C. Hönninger, R. Paschotta, F. Morier-Genoud, M. Moser, and U. Keller, “Q-switching stability limits of continuous-wave passive mode locking,” J. Opt. Soc. Am. B 16, 46–57 (1999). [CrossRef]
  23. L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007). [CrossRef]

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