- 标题
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[IEEE 2018 European Conference on Optical Communication (ECOC) - Rome, Italy (2018.9.23-2018.9.27)] 2018 European Conference on Optical Communication (ECOC) - Ultra-Short Wavelength Operation of Thulium-Doped Fibre Amplifier in the 1628–1655nm Waveband
摘要： We present a silica-based thulium-doped fibre amplifier in the 1628-1655nm waveband based on Tm/Ge co-doped fibre. Up to 19dB external small signal gain and a noise figure of 4.4dB are achieved at 1655nm.
关键词： silica-based,Tm/Ge co-doped fibre,ultra-short wavelength operation,optical communications,thulium-doped fibre amplifier
更新于2025-11-28 14:24:03
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GaSe saturable absorber for mode-locked Er-doped fiber laser
摘要： A GaSe-PVA based saturable absorber (SA) is prepared by liquid-phase stripping method. The linear and nonlinear transmission spectrum, AFM, SEM and Raman spectrum are used to characterize the SA, the modulation depth of 6.4% and the saturation intensity of 72 MW/cm2 indicated that the GaSe nanosheets can be employed as SA for mode-locked (ML) operation in Er-doped fiber laser (EDFL). The passively mode-locked operation with the output power of 29.1 mW, pulse width of 4.3 ps and repetition rate of 8.849 MHz can be obtained by GaSe-PVA based SA.
关键词： mode-locked,Er-doped fiber laser,GaSe saturable absorber
更新于2025-11-28 14:24:03
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High-energy dissipative soliton resonance and rectangular noise-like pulse in a figure-9 Tm fiber laser
摘要： We experimentally demonstrate a direct generation of high-energy dissipative soliton resonance (DSR) and rectangular noise-like pulse (NLP) in a figure-9 thulium-holmium-doped mode-locked fiber laser. The pulse duration and average output power of the DSR can be tuned from 33.5 ns to 144.6 ns, and from 100.25 mW to 677.5 mW, respectively. The maximum of pulse energy is 713.2 nJ without wave breaking at pump power of 6.7 W, which is the highest energy of DSR in the region of 2 μm, to the best of our knowledge. In addition, the rectangular NLP with 452 nJ pulse bunch energy is also obtained.
关键词： dissipative soliton resonance,noise-like pulse,high-energy pulses,thulium-holmium-doped fiber laser
更新于2025-11-28 14:24:03
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High-power dissipative soliton resonance fiber laser with compact linear-cavity configuration
摘要： An ultra-compact mode-locked Yb-doped fiber laser under the operation regime of dissipative soliton resonance (DSR) has been demonstrated, which exports sub-nanoscond pulses with a maximum output average power of 2.4 W. The linear-cavity configuration of the proposed fiber laser is formed by a highly reflective fiber Bragg grating at 1066 nm and a nonlinear optical loop mirror (NOLM) consisting of a 5/95 optical coupler. As a result, DSR pulses with maximum average power of 2.4 W and repetition rate of 10.119 MHz have been obtained, when pump power is 10 W. The compact DSR Yb-doped fiber laser with high output power have great potential applications in material processing, optical communications, and so on.
关键词： dissipative soliton resonance,Yb-doped fiber laser.,mode-locked
更新于2025-11-28 14:24:03
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Ultrafast mode-locked dual-wavelength thulium-doped fiber laser using a Mach-Zehnder interferometric filter
摘要： A simple and robust method to generate a dual-wavelength mode-locked laser using a tunable Mach-Zehnder filter (TMZF) and a single-wall carbon nanotube (SWCNT) based saturable absorber (SA) is proposed and demonstrated. The proposed laser uses a thulium-doped fiber for lasing in the two-micron region and exploits the interferometric spectrum of the TMZF to produce dual peaks with nearly equal magnitude. SWCNT based SA enables mode-locking at a threshold value of 150.4 mW with distinct dual-wavelength peaks at 1919.2 nm and 1963.7 nm. The peaks have a calculated pulse width of 1.8 ps and 1.6 ps, respectively with a repetition rate of 9.1 MHz with a relatively high optical-signal-to-noise ratio value of 59.1 dB. The output is also observed to remain unchanged over time, indicating high stability. The proposed laser has a promising application, particularly in ultrafast gas molecular spectroscopy and sensing.
关键词： Thulium-doped fiber laser,Mode-locking,Dual-wavelength,Mach-Zehnder filter
更新于2025-11-28 14:24:03
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L-Band Efficient Dissipative Soliton Erbium-Doped Fiber Laser with a Pulse Energy of 6.15 nJ and 3 dB Bandwidth of 47.8 nm
摘要： Here, an efficient dissipative soliton mode-locked fiber laser in the L-band using nonlinear polarization rotation technology is demonstrated. With a maximum pump power of 495.3 mW and polarization state optimization, the fiber laser delivers a maximum output power of 68.6 mW with an 11.16 MHz repetition rate and a corresponding single pulse energy of 6.15 nJ. The dissipative soliton spectrum is centered at 1599.6 nm with a 3 dB bandwidth of 47.8 nm. The full width at half maximum of the compressed pulse is 156 fs. To the best of our knowledge, this is the highest single pulse energy reported so far for an L-band passively mode-locked all-fiber laser.
关键词： mode-locked fiber laser,Erbium-doped fiber,dissipative soliton,L-band
更新于2025-11-28 14:24:03
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Pure gold saturable absorber for generating Q-switching pulses at 2?μm in Thulium-doped fiber laser cavity
摘要： We experimentally demonstrate Q-switched Thulium-doped fiber laser operating at 1949.19 nm using pure gold saturable absorber (Au-SA) as a Q-switcher. The Au-SA was fabricated by depositing gold particles molecules using electron beam evaporation on the surface of a polyvinyl alcohol (PVA) film. Subsequently, stable Q-switched pulses were obtained within the 1552 nm pump power range from 343.1 to 467.3 mW, with repetition rate tuned from 11.7 kHz to 21.95 kHz. At 467.3 mW pump power, the TDFL produced pulses train with the pulse width of 2.6 μs and the maximum pulse energy of 89.8 nJ. These results propose that pure gold could be a promising saturable absorber for pulse generation in 2 μm wavelength region.
关键词： Thulium-doped fiber laser,Q-switching,Pure gold saturable absorber
更新于2025-11-28 14:24:03
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Passively Q-Switched All-Fiber Yb-Doped Lasers Based on Nonlinear Multimode Interference?
摘要： We report a passively Q-switched all-?ber Yb-doped laser using the structure of step-index multimode ?ber and graded-index ?ber (SIMF-GIMF) as a new saturable absorber (SA) based on the nonlinear multimode interference (NL-MMI). Through bending the SA to a certain state, we obtain a stable Q-switched laser operation with the shortest pulse duration of 4.37 μs and a corresponding repetition rate of 147.6 kHz with center at 1,039 nm. The maximum average output power and single pulse energy are recorded to be 2.409 mW and 16.3 nJ, respectively. To the best of our knowledge, this paper con?rms experimentally for the ?rst time Q-switched laser operation based on SIMF-GIMF SA in all-?ber lasers. In addition, we also observed unstable Q-switched mode-locking operation. All-?ber lasers based on SIMF-GIMF SA are attractive for practical applications and undergo no damage and performance degradation with time.
关键词： multimode ?bers,all-?ber Yb-doped lasers,Q-switched operation
更新于2025-11-28 14:24:03
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Mode-locked near-infrared thulium doped fibre laser using evanescent field effect with Bi <sub/>2</sub> O <sub/>3</sub> saturable absorber
摘要： Using the evanescent field effect, a high power passively mode-locked laser with a pulse duration of 1.85 ps and the pulse energy of 13.15 pJ is demonstrated. A Bi2O3 solution is used as a saturable absorber (SA) on a side polished fibre incorporated into a thulium doped fibre laser cavity for operation in the mid-infrared range. The 37.61% SA has a modulation depth and creates a highly stable mode-locked pulse output with a short pulse duration. The calculated net cavity dispersion at central wavelength is ?1.4 ps2, indicating operation is in the anomalous dispersion regime and confirmed by the presence of Kelly’s side-bands observed in the generated optical spectrum. Radio frequency analysis reveals a high signal to noise ratio, making this laser stable for use in telecommunication systems.
关键词： thulium doped fibre laser,evanescent field effect,Bi2O3 saturable absorber
更新于2025-11-28 14:23:57
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Self-wavelength-sweeping in a bi-directional thulium-doped fiber ring laser
摘要： We report for the first time the self-wavelength-sweeping phenomenon of a bi-directional thulium-doped fiber ring laser. The laser wavelength can spontaneously sweep in both lasing directions at a rate up to 0.2 nm s?1 over 15 nm sweeping range in the 1.95 μm wavelength region. The sweeping rate can be controlled by simply changing the state of polarization of the laser cavity. The laser can be tuned to generate a periodical wavelength-swept output with microsecond pulses in the time domain. The sweep rate can also be tuned to zero to give a static lasing wavelength.
关键词： self-wavelength-sweeping,thulium-doped fiber ring laser,polarization control,bi-directional
更新于2025-11-28 14:23:57