Initial Transmission Influence on Saturable Absorber Absorption Activity of Passive Q-Switching Erbium -Doped Fiber Laser System


  • Zainab Ali college of science university of thi_Qar
  • Zainab Abdulsada University of Thi-Qar
  • Nagamalli Arasavalli KLEF_KL University
  • Sally Kadhim University of Thi-Qar
  • Haneen Akram University of Thi-Qar



Passive Q-Switched, Er +3 Doped Fiber Laser , absorption activity


The initial transmission effect on the activity of Cr+4: YAG saturable absorber with Er +3 doped fiber laser was investigated. Software computer program was built in this study for solving the rate equations model by Rung - Kutta –Fehlberg numerical method. The study reported that the absorption activity of ground state of saturable absorber decreases with the decreasing of the initial transmission, while the activity absorption of excited state begins to increase. Moreover,  the total absorption activity of saturable absorber also decreases with the decreasing of the initial transmission.


Y. Huang et al., “Widely-tunable, passively Q-switched erbium-doped fiber laser with few-layer MoS_2 saturable absorber,” Opt. Express, vol. 22, no. 21, p. 25258, 2014, doi: 10.1364/oe.22.025258.

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Investigation of terahertz generation from passively Q-switched dual-frequency laser pulses,” Opt. Lett., vol. 36, no. 24, p. 4818, 2011, doi: 10.1364/ol.36.004818.

S. K. M. Al-Hayali, S. Selleri, and A. H. Al-Janabi, “Dual-Wavelength Passively Q-Switched Ytterbium-Doped Fiber Laser Based on Aluminum Oxide Nanoparticle Saturable Absorbers,” Chinese Phys. Lett., vol. 34, no. 11, pp. 1–4, 2017, doi: 10.1088/0256-307X/34/11/114201.

A. Nady, A. A. Latiff, A. Numan, C. H. R. Ooi, and S. W. Harun, “Theoretical and experimental studies on a Q-switching operation in an erbium-doped fiber laser using vanadium oxide as saturable absorber,” Laser Phys., vol. 28, no. 8, p. 85106, 2018.

W. Zhang et al., “Passively Q-switched and mode-locked erbium-doped fiber lasers based on tellurene nanosheets as saturable absorber,” Opt. Express, vol. 28, no. 10, p. 14729, 2020, doi: 10.1364/oe.392944.

R. Zhang et al., “Tunable Q-Switched fiber laser based on a graphene saturable absorber without additional tuning element,” IEEE Photonics J., vol. 11, no. 1, pp. 1–10, 2019, doi: 10.1109/JPHOT.2019.2892646.

X. Bai, C. Mou, L. Xu, S. Wang, S. Pu, and X. Zeng, “Passively Q-switched erbium-doped fiber laser using Fe3O4-nanoparticle saturable absorber,” vol. 042701, 1882.

A. J. Kenyon et al., “Luminescence from erbium-doped silicon nanocrystals in silica : Excitation mechanisms Luminescence from erbium-doped silicon nanocrystals in silica : Excitation mechanisms,” vol. 367, no. 2002, 2006, doi: 10.1063/1.1419210.

I. G. et al., “Application of the erbium-doped fiber amplifier (EDFA) in wavelength division multiplexing (WDM) transmission systems,” Int. J. Phys. Sci., vol. 9, no. 5, pp. 95–101, 2014, doi: 10.5897/ijps2013.4066.

M. E. Jazi and M. Soltanolkotabi, “Investigation of Effective Parameters on Pulsed Nd : YAG Passive Q-Switched Laser,” vol. 5, no. 1, 2011.

Y. Chen et al., “Large energy, wavelength widely tunable topological insulator Q-SwithedErbium-Doped Fiber Laser,” vol. 20, no. 5, 2014.

R. P. Y. An and R. S. Un, “Continuous-wave and passively Q-switched tape casting YAG / Nd : YAG / YAG ceramic laser,” vol. 6, no. 9, pp. 1965–1967, 2016.

Y. Shan et al., “ One-order-higher Cr 4+ conversion efficiency in Cr 4+ :YAG transparent ceramics for a high-frequency passively Q-switched laser ,” Photonics Res., vol. 7, no. 8, p. 933, 2019, doi: 10.1364/prj.7.000933.

S. Abdulhussain and A.-K. M. Salih, “Rate Equations Model to Simulate the Dual Generation of Nd+3: YAG Passive Q-Switched Laser Pulses,” Indian J. Sci. Technol., vol. 16, no. 40, pp. 3462–3470, 2023, doi: 10.17485/ijst/v16i40.1748.

D. Saad Hussein and A.-K. Mahdi Salih, “Simulation of Saturable Absorber Material Population Density Effect on Pulse Characteristics of Passively Q-Switching Yb +3 Doped Fiber Laser,” no. July, 2020, [Online]. Available:

M. A. Belov, L. I. Burov, and L. G. Krylova, “Influence of the Cr4+: YAG saturable absorber parameters on output characteristics of the Nd3+: LSB laser in Q-switched regime,” Nonlinear Phenom. Complex Syst., vol. 18, no. 2, pp. 140–148, 2015.

A. S. Majli and A. K. M. Salih, “Simulation of active medium emission cross section influence on passive q-switching laser pulse characteristics,” NeuroQuantology, vol. 18, no. 5, pp. 62–66, 2020, doi: 10.14704/nq.2020.18.5.NQ20169.

A. M. Salih and G. Zamel “Simulation of saturable absorber material length effect on characteristics of Passive Q-switching and Stokes pulses” Journal of Thi-Qar University vol. 11, no. 3, pp. 23–34, 2016.

X. Zhang, S. Zhao, Q. Wang, Q. Zhang, L. Sun, and S. Zhang, “Optimization of Cr/sup 4+/-doped saturable-absorber Q-switched lasers,” IEEE J. Quantum Electron., vol. 33, no. 12, pp. 2286–2294, 1997.

M. Tsunekane and T. Taira, “Direct measurement of temporal transmission distribution of a saturable absorber in a passively Q-switched laser,” IEEE J. Quantum Electron., vol. 52, no. 5, 2016, doi: 10.1109/JQE.2016.2541922.

H. Tanaka, C. Kränkel, and F. Kannari, “Transition-metal-doped saturable absorbers for passive Q-switching of visible lasers,” Opt. Mater. Express, vol. 10, no. 8, p. 1827, 2020, doi: 10.1364/ome.395893.

D. Savastru, S. Miclos, and I. Lancranjan, “Theoretical analysis of a passively q-switched erbium doped fiber laser,” Rev. Tehnol. Neconv., vol. 16, no. 1, p. 47, 2012.


Article Dates

Published: 2023-12-28

How to Cite

Ali, Z., Abdulsada, Z., Arasavalli, N., Kadhim, S., & Akram , H. (2023). Initial Transmission Influence on Saturable Absorber Absorption Activity of Passive Q-Switching Erbium -Doped Fiber Laser System. University of Thi-Qar Journal of Science, 10(2), 224–229.