Solving Rate Equations Including Background Losses Applicable to Threshold Pumped Fiber Lasers with Three-Energy-Level Dopants

2011 ◽  
Vol 121-126 ◽  
pp. 4788-4795
Author(s):  
Jia Ling Wang ◽  
Xin Du ◽  
Jia Lv ◽  
Ru Hai Dou ◽  
Jian Guo Chen ◽  
...  
Keyword(s):  
Pump Power ◽  
Energy Level ◽  
Fiber Laser ◽  
Fiber Lasers ◽  
Energy Levels ◽  
Rate Equations ◽  
Population Densities ◽  
Analytical Expression ◽  
Threshold Pump Power ◽  
Loss Coefficients

An analytical expression of the threshold pump power of the fiber laser with three-energy-level dopants has been obtained from rate equations including loss coefficients of the pump and laser radiations. And the rate equations describing the threshold pumped fiber lasers have been analytically solved following the derivation of the implicit expression specifying the pump variation along the fiber and expressions of the position dependent population densities on the three energy levels in terms of the pump variation.

MoS2-wrapped microfiber-based multi-wavelength soliton fiber laser

2017 ◽  
Vol 31 (32) ◽  
pp. 1750303 ◽  
Author(s):  
Feifei Lu
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Optical Communications ◽  
Fiber Lasers ◽  
Tunable Filter ◽  
Linear Birefringence ◽  
Erbium Doped ◽  
Potential Applications ◽  
Multi Wavelength

The single-, dual- and triple-wavelength passively mode-locked erbium-doped fiber lasers are demonstrated with MoS2 and polarization-dependent isolator (PD-ISO). The saturable absorber is fabricated by wrapping an MoS2 around a microfiber. The intracavity PD-ISO acts as a wavelength-tunable filter with a polarization controller (PC) by adjusting the linear birefringence. Single-wavelength mode-locked fiber laser can self-start with suitable pump power. With appropriate PC state, dual- and triple-wavelength operations can be observed when gains at different wavelengths reach a balance. It is noteworthy that dual-wavelength pulses exhibiting peak and dip sidebands, respectively, are demonstrated in the experiment. The proposed simple and multi-wavelength all-fiber conventional soliton lasers could possess potential applications in numerous fields, such as sensors, THz generations and optical communications.

scholarly journals Analysis of Energy Transfer among Stokes Components in Raman Fiber Lasers

2020 ◽  
Author(s):  
Lelio de la Cruz-May ◽  
Efraín Mejía Beltrán ◽  
Olena Benavides ◽  
Rafael Sanchez Lara
Keyword(s):  
Experimental Data ◽  
Energy Transfer ◽  
Pump Power ◽  
Energy Level ◽  
Fiber Lasers ◽  
Critical Power ◽  
Small Signal ◽  
Stored Energy ◽  
Pumping Power ◽  
The Relationship

This work presents a methodology to estimate the pumping power required for the first Stokes to reach its maximum stored energy level, before it generates the next Stokes. These estimates are achieved by experimentally measuring the critical power and the relationship between the pumping power (PP0) and the small signal of the stimulated Raman spread (PF0). For our study we used 1 km of 1060-XP fiber, experimentally obtaining Pcr = 6.693 W, PF0/PP0 = 6.759x10−6. With these experimental data, the pump power required for the first Stokes to reach its maximum stored energy level was 13.39 W, and the stored energy in the first Stokes was 9.88 W. It is important to note that the Raman threshold ln(PP0/PF0) = 11.9 is smaller than the initially reported ∼16.

scholarly journals Development of Nano-engineered Thulium-doped Fiber Laser With Low Threshold Pump Power and Tunable Operating Wavelength

2015 ◽  
pp. 1-1 ◽  
Author(s):  
Mukul Paul ◽  
Anirban Dhar ◽  
Shyamal Das ◽  
A.A. Latiff ◽  
M.T. Ahmad ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Threshold Pump Power ◽  
Operating Wavelength ◽  
Low Threshold

Analytical solutions to rate equations of fiber lasers containing three-energy-level ions

2006 ◽  
Vol 267 (1) ◽  
pp. 149-153 ◽  
Author(s):  
Liping Zhang ◽  
Zhichun Duan ◽  
Jianguo Chen
Keyword(s):  
Energy Level ◽  
Analytical Solutions ◽  
Fiber Lasers ◽  
Rate Equations

scholarly journals Graphene Oxide Film as Passive Q-switcher in Erbium-doped Fiber Laser Cavity

2017 ◽  
Vol 9 (3) ◽  
pp. 100 ◽  
Author(s):  
Fauziah Che Mat ◽  
Moh Yasin ◽  
Anas Abdul Latiff ◽  
Sulaiman Wadi Harun
Keyword(s):  
Graphene Oxide ◽  
Pump Power ◽  
Oxide Film ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Repetition Rate ◽  
Fiber Lasers ◽  
Pulse Generation ◽  
High Speed Photography ◽  
Erbium Doped

All-fiber passively Q-switched fiber lasers have been demonstrated by using graphene oxide (GO) Q-switcher for possible applications in telecommunication, laser processing, fiber sensing and medical community. The GO material was obtained through a modified Hummers method from expanded acid washed graphite flakes and it was embedded into a polyvinyl alcohol (PVA) film to form a saturable absorber (SA) device. The Q-switched pulse operates at 1563.3 nm with a repetition rate that can be tuned from 44.33 kHz to 61.77 kHz as the pump power changes from 39 mW to 96 mW. The highest repetition rate of 61.77 kHz is achieved at a pump power of 96 mW and it is observed that the Q-switched pulse produced maximum pulse energy of 0.054 nJ and pulse width of 5.57 ?s at 96 mW pump power. Full Text: PDF ReferencesJ. Zayhowski and C. Dill, "Coupled-cavity electro-optically Q-switched Nd:YVO4 microchip lasers", Optics letters 20, 716 (1995). CrossRef C.-x. Gao, W. Zhao, Y.-s. Wang, S.-l. Zhu, G.-f. Chen, and Y.-g. Wang, "Passive Q-switched fiber laser with SESAM in ytterbium-doped double-clad fiber", 27th International congress on High-Speed Photography and Photonics, 62794G (2007). CrossRef M. Ahmed, N. Ali, Z. Salleh, A. Rahman, S. Harun, M. Manaf, "Q-switched erbium doped fiber laser based on single and multiple walled carbon nanotubes embedded in polyethylene oxide film as saturable absorber", Optics & Laser Technology 65, 25 (2015). CrossRef S. Harun, M. Ismail, F. Ahmad, M. Ismail, R. Nor, N. Zulkepely, et al., "A Q-switched erbium-doped fiber laser with a carbon nanotube based saturable absorber", Chinese Physics Letters 29, 114202 (2012). CrossRef A. Martinez and Z. Sun, "Nanotube and graphene saturable absorbers for fibre lasers", Nat Photon 7, 842 (2013). CrossRef J. Boguslawski, J. Sotor, G. Sobon, R. Kozinski, K. Librant, M. Aksienionek, et al., "Graphene oxide paper as a saturable absorber for Er- and Tm-doped fiber lasers", Photonics Research 3, 119 (2015). CrossRef H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, "Q-switched pulse generation from an all-f iber distributed Bragg reflector laser using graphene as saturable absorber", Chinese Optics Letters 11, 071401 (2013). CrossRef

Derivation of the threshold pump power of erbium-doped fiber lasers

1992 ◽  
Vol 17 (13) ◽  
pp. 926 ◽  
Author(s):  
Jianguo Chen ◽  
X. Zhu ◽  
W. Sibbett
Keyword(s):  
Pump Power ◽  
Fiber Lasers ◽  
Threshold Pump Power ◽  
Erbium Doped

scholarly journals A Passively Q-Switched Holmium-Doped Fiber Laser with Graphene Oxide at 2058 nm

2021 ◽  
Vol 11 (1) ◽  
pp. 407
Author(s):  
Jinho Lee ◽  
Ju Han Lee
Keyword(s):  
Graphene Oxide ◽  
Pump Power ◽  
Fiber Laser ◽  
Ring Resonator ◽  
Continuous Wave ◽  
Optical Power ◽  
Polished Surface ◽  
Fiber Ring ◽  
Q Switching ◽  
Side Polished Fiber

This study reports a Q-switching-based, 2058-nm holmium (Ho) fiber laser incorporating a saturable absorber (SA) based on graphene oxide (GO). The SA was prepared with a side-polished fiber, while GO particles were deposited onto the fiber-polished surface to realize an all-fiber SA. A continuous-wave thulium-doped all-fiber laser, which was configured with a master-oscillator power-amplifier (MOPA) structure, was constructed as a pumping source. By inserting the fabricated SA into an all-fiber ring resonator based on 1-m length of Ho-doped fiber, Q-switched pulses could readily be obtained at a wavelength of 2058 nm. The pulse width was observed to vary from 2.01 to 1.56 μs as the pump power was adjusted from ~759 to 1072 mW, while the repetition rate was tunable from 45.56 to 56.12 kHz. The maximum values of average optical power and pulse energy were measured as ~11.61 mW and 207.05 nJ, respectively, at a ~1072 mW pump power.

Radical induced intermolecular linkage and energy level modifications of a porphyrin monolayer

2017 ◽  
Vol 53 (6) ◽  
pp. 1104-1107 ◽  
Author(s):  
Abdolreza Jahanbekam ◽  
Colin Harthcock ◽  
David Y. Lee
Keyword(s):  
Energy Level ◽  
Scanning Tunneling Microscopy ◽  
Surface Structure ◽  
Energy Levels ◽  
New Method ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Molecular Scale

A new method to directly modify the surface structure and energy levels of a porphyrin monolayer was examined with molecular-scale resolution using scanning tunneling microscopy and spectroscopy (STM and STS) and presented in this communication.

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