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Tunable and Switchable Narrow Bandwidth Semiconductor-Saturable Absorber Mirror Mode-Locked Yb-Doped Fiber Laser Delivering Different Pulse Widths 被引量:1
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作者 王兆坤 邹峰 +2 位作者 王子薇 杜松涛 周军 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第3期36-39,共4页
The wavelength-tunable and switchable narrow bandwidth mode-locking operation is demonstrated in an all fiber laser based on semiconductor-saturable absorber mirror (SESAM). Two narrow-band fiber Bragg gratings cent... The wavelength-tunable and switchable narrow bandwidth mode-locking operation is demonstrated in an all fiber laser based on semiconductor-saturable absorber mirror (SESAM). Two narrow-band fiber Bragg gratings centered at 1029.9nm and 1032nm respectively with a polarization controller inserted between them are used to realize the wavelength switchable between 1029.9nm and 1032nm. The laser delivers different pulse widths of 7.5ps for 1030nm and 20ps for 1032nm. The maximum output power for both could reach -6.5mW at single pulse operation. The output wavelength couM be tuned to about 0.gnm intervals ranging from 1030.2nm to 1031.1 nm and from 1032.15nm to 1033.7nm with the temperature change of the fiber Bragg grating, respectively. 展开更多
关键词 mode in Yb of Tunable and Switchable Narrow Bandwidth Semiconductor-Saturable Absorber Mirror Mode-Locked Yb-Doped fiber Laser Delivering Different pulse Widths nm
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Generation of 47 fs Pulses from an Er:Fiber Amplifier 被引量:2
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作者 欧尚明 刘关玉 +2 位作者 雷卉 张志刚 张庆茂 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第7期101-104,共4页
We demonstrate a self-starting erbium fiber oscillator-amplifier system based on the nonlinear polarization rota- tion mode-locked mechanism. The direct output pulse from the amplifier is 47fs with an average power of... We demonstrate a self-starting erbium fiber oscillator-amplifier system based on the nonlinear polarization rota- tion mode-locked mechanism. The direct output pulse from the amplifier is 47fs with an average power of 1.22 W and a repetition rate of 50 MHz, corresponding to a pulse energy of 24 nJ. The full width at half-maximum of the spectrum of the output pulses is approximately 93nm at a central wavelength of 1572nm so that the transform- limited pulse duration is as short as 39 fs. Due to the imperfect dispersion compensation, we compress the pulses to 47fs in this experiment. 展开更多
关键词 Generation of 47 fs pulses from an Er:fiber Amplifier
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Theory of noise in a kilo-Hz cascaded high-energy Yb-doped nanosecond pulsed fiber amplifier
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作者 刘明 张海涛 +5 位作者 巩马理 赵跃进 程文雍 孟阔 郑超 陈倚竹 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第4期335-341,共7页
A theoretical analysis of noise in a high-power cascaded fiber amplifier is presented. Unlike the noise theory in low power communication, the noise of a high power system is redefined as the leaked output energy betw... A theoretical analysis of noise in a high-power cascaded fiber amplifier is presented. Unlike the noise theory in low power communication, the noise of a high power system is redefined as the leaked output energy between pulses with coherent beat noise uncounted. This definition is more appropriate for high power usage in which the pulse energy receives more attention than the pulse shape integrity. Then the low power pre-amplifying stages are considered as linear amplification and analyzed by linear theory. In the high-power amplification stages, the inversion is assumed to recover linearly in the time interval between pulses. The time shape of the output pulse is different from that of the input signal because of different gains at the front and back ends of the pulse. Then, a criterion is provided to distinguish the nonlinear and linear amplifications based on the signal-to-noise ratio (SNR) analysis. Then, an experiment that shows that the output SNR actually drops off in nonlinear amplification is performed. The change in the noise factor can be well evaluated by pulse shape distortion. 展开更多
关键词 pulsed fiber amplifier signal-to-noise ratio cascaded amplifier master oscillator power amplifier
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Harmonic Dark Pulse Emission in Erbium-Doped Fiber Laser
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作者 Zian Cheak Tiu Arman Zarei +2 位作者 Sin Jin Tan Harith Ahmad Sulaiman Wadi Harun 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第3期49-51,共3页
A harmonic dark pulse generation in an erbium-doped fiber laser is demonstrated based on a figure-of-eight configuration. It is found that the harmonic dark pulse can be shifted from the fundamental to the 5th order h... A harmonic dark pulse generation in an erbium-doped fiber laser is demonstrated based on a figure-of-eight configuration. It is found that the harmonic dark pulse can be shifted from the fundamental to the 5th order harmonic by increasing the pump power with an appropriate polarization controller orientation. The fundamental repetition rate of 2O kHz is obtained at the pump power of 29 m W. The highest pulse energy of 42.6 n3 is obtained at the fundamental repetition rate. The operating frequency of the dark pulse trains shifts to 2nd, 3rd, 4th and 5th harmonic as the pump powers are increased to 34mW, 50mW, 59mW and 137mW, respectively. 展开更多
关键词 Harmonic Dark pulse Emission in Erbium-Doped fiber Laser EDF DSF kHz
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Using Reduced Graphene Oxide to Generate Q-Switched Pulses in Er-Doped Fiber Laser
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作者 Lu Li Rui-Dong Lv +4 位作者 Si-Cong Liu Zhen-Dong Chen Jiang Wang Yong-Gang Wang Wei Ren 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第11期32-34,共3页
Using the reduced graphene oxide(rGO) as a saturable absorber(SA) in an Er-doped fiber(EDF) laser cavity,we obtain the Q-switching operation. The rGO SA is prepared by depositing the GO on fluorine mica(FM) us... Using the reduced graphene oxide(rGO) as a saturable absorber(SA) in an Er-doped fiber(EDF) laser cavity,we obtain the Q-switching operation. The rGO SA is prepared by depositing the GO on fluorine mica(FM) using the thermal reduction method. The modulation depth of rGO/FM is measured to be 3.2%. By incorporating the rGO/FM film into the EDF laser cavity, we obtain stable Q-switched pulses. The shortest pulse duration is3.53 μs, and the maximum single pulse energy is 48.19 nJ. The long-term stability of working is well exhibited.The experimental results show that the rGO possesses potential photonics applications. 展开更多
关键词 EDF GO Using Reduced Graphene Oxide to Generate Q-Switched pulses in Er-Doped fiber Laser SA
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Generation of few-cycle laser pulses:Comparison between atomic and molecular gases in a hollow-core fiber
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作者 黄志远 戴晔 +2 位作者 赵睿睿 王丁 冷雨欣 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第7期239-245,共7页
We numerically study the pulse compression approaches based on atomic or molecular gases in a hollow-core fiber.From the perspective of self-phase modulation(SPM), we give the extensive study of the SPM influence on... We numerically study the pulse compression approaches based on atomic or molecular gases in a hollow-core fiber.From the perspective of self-phase modulation(SPM), we give the extensive study of the SPM influence on a probe pulse with molecular phase modulation(MPM) effect. By comparing the two compression methods, we summarize their advantages and drawbacks to obtain the few-cycle pulses with micro- or millijoule energies. It is also shown that the double pump-probe approach can be used as a tunable dual-color source by adjusting the time delay between pump and probe pulses to proper values. 展开更多
关键词 hollow-core fiber phase modulation pulses compression few-cycle pulses
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Pulse Propagation with Self-Phase Modulation in Nonlinear Chiral Fiber and Its Applications
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作者 Demissie Gelmecha 李俊庆 Merhawit Teklu 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第9期43-47,共5页
From Maxwell's equations and Post's formalism, a generalized chiral nonlinear Schr6dinger equation (CNLSE) is obtained for the nonlinear chiral fiber. This equation governs light transmission through a dispersive ... From Maxwell's equations and Post's formalism, a generalized chiral nonlinear Schr6dinger equation (CNLSE) is obtained for the nonlinear chiral fiber. This equation governs light transmission through a dispersive nonlinear chiral fiber with joint action of chirality in linear and nonlinear ways. The generalized CNLSE shows a modu- lation of chirality to the effect of attenuation and nonlinearity compared with the case for a conventional fiber. Simulations based on the split-step beam propagation method reveal the role of nonlinearity with cooperation to chirality playing in the pulse evolution. By adjusting its strength the role of chirality in forming solitons is demonstrated for a given circularly polarized component. The application of nonlinear optical rotation is also discussed in an all-optical switch. 展开更多
关键词 of on for in pulse Propagation with Self-Phase Modulation in Nonlinear Chiral fiber and Its Applications with that IS
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A Review on Fiber Lasers 被引量:3
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作者 Lin Jintong Lu Dan Dai Yitang 《China Communications》 SCIE CSCD 2012年第8期1-15,共15页
After a half century of development, fiber laser has evolved from a concept to a great family penetrating into various fields of applications. This paper reviews the history and current development of fiber lasers, wi... After a half century of development, fiber laser has evolved from a concept to a great family penetrating into various fields of applications. This paper reviews the history and current development of fiber lasers, with topics covering both continuous wave and short pulse fiber lasers. Important issues such as the major rare earth dopants, fiber laser brightness, polarization effects, clad pumping technology, beam combination, mode locking and pulse shaping are discussed in this paper. 展开更多
关键词 fiber laser rare earth doped fiber continuous wave fiber laser ultra-short pulse fiber laser
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A theoretical and experimental investigation of an in-band pumped gain-switched thulium-doped fiber laser 被引量:2
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作者 周仁来 鞠有伦 +2 位作者 赵杰 杨超 王月珠 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第6期389-394,共6页
In this paper, the theoretical rate equation model of an in-band pumped gain-switched thulium-doped fiber (TDF) laser is investigated. The analytical formulations of pump energy threshold, peak power extraction effi... In this paper, the theoretical rate equation model of an in-band pumped gain-switched thulium-doped fiber (TDF) laser is investigated. The analytical formulations of pump energy threshold, peak power extraction efficiency, and pulse extraction efficiency are derived through analyzing the interaction process between the pump pulse and the laser pulse. They are useful for understanding, designing, and optimizing the in-band pumped TDF lasers in a 1.9 μm-2.1 μm wavelength region. The experiment with an all-fiber gain-switched TDF laser pumped by a 1.558-μm pulse amplifier is conducted, and our experimental results show good agreement with theoretical analysis. 展开更多
关键词 pulse fiber laser gain-switched laser thulium-doped fiber (TDF) laser rate equation model lasertheory
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Investigation on Material Response of 55% SiCp/Al Composites Induced by Pulsed Laser 被引量:1
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作者 HU Maoshun ZHAO Guolong +3 位作者 LI Liang ZHANG Xiaohui ZHANG Kaihu ZHAO Wei 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第S01期49-57,共9页
Silicon carbide particle reinforced aluminum matrix composites(SiCp/Al composites)are widely used in aviation,aerospace and electronic package.However,low machining efficiency,severe tool wear and poor surface quality... Silicon carbide particle reinforced aluminum matrix composites(SiCp/Al composites)are widely used in aviation,aerospace and electronic package.However,low machining efficiency,severe tool wear and poor surface quality are severe during the machining of SiCp/Al composites.Laser-induced oxidation is capable to improve the machinability of SiCp/Al composites.The material response of 55%(volume fraction)SiCp/Al composites induced by a nanosecond pulsed laser is studied.A metamorphic layer which is composed of an oxide layer and sub-layer is produced.The effects of reaction surrounding and laser average power on the microstructure and thickness of the oxide layer and sub-layer are investigated.Experimental results show that:A thicker oxide layer and a sub-layer are formed in an oxygen-rich atmosphere.The oxides are mainly composed of 2Al2O3·SiO2(mullite).A positive correlation between the laser average power and thicknesses of oxide layers and sub-layers is found.A loose oxide layer of 138μm and a sub-layer of 21μm are formed at the laser average power of 6 W,laser scanning pitch of 10μm,and laser scanning speed of 1 mm/s under an oxygen-rich atmosphere.The high efficient machining of Si Cp/Al composites can be realized by laser-induced oxidation. 展开更多
关键词 MICROSTRUCTURE oxidation behavior SiCp/Al composites ytterbium-doped pulsed fiber laser
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2-μm mode-locked nanosecond fiber laser based on MoS_2 saturable absorber
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作者 王小发 彭晓玲 +4 位作者 姜秋霞 顾小辉 张俊红 毛雪峰 袁素贞 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第11期221-224,共4页
We demonstrated a 2-μm passively mode-locked nanosecond fiber laser based on a MoS2 saturable absorber(SA).Owing to the effect of nonlinear absorption in the MoS2 SA, the pulse width decreased from 64.7 to 13.8 ns ... We demonstrated a 2-μm passively mode-locked nanosecond fiber laser based on a MoS2 saturable absorber(SA).Owing to the effect of nonlinear absorption in the MoS2 SA, the pulse width decreased from 64.7 to 13.8 ns with increasing pump power from 1.10 to 1.45 W. The use of a narrow-bandwidth fiber Bragg grating resulted in a central wavelength and 3-dB spectral bandwidth of 2010.16 and 0.15 nm, respectively. Experimental results show that MoS2 is a promising material for a 2-μm mode-locked fiber laser. 展开更多
关键词 nanosecond mode-locked pulses Tm-doped fiber laser MoS2 fiber Bragg grating
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Dual-wavelength rectangular pulse erbium-doped fiber laser based on topological insulator saturable absorber 被引量:8
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作者 Bo Guo Yong Yao +4 位作者 Yan-Fu Yang Yi-Jun Yuan Lei Jin Bo Yan Jian-Yu Zhang 《Photonics Research》 SCIE EI 2015年第3期94-99,共6页
We reported on the generation of the dual-wavelength rectangular pulse in an erbium-doped fiber laser(EDFL)with a topological insulator saturable absorber.The rectangular pulse could be stably initiated with pulse wid... We reported on the generation of the dual-wavelength rectangular pulse in an erbium-doped fiber laser(EDFL)with a topological insulator saturable absorber.The rectangular pulse could be stably initiated with pulse width from 13.62 to 25.16 ns and fundamental repetition rate of 3.54 MHz by properly adjusting the pump power and the polarization state.In addition,we verified that the pulse shape of the dual-wavelength rectangular pulse can be affected by the total net cavity dispersion in the fiber laser.Furthermore,by properly rotating the polarization controllers,the harmonic mode-locking operation of the dual-wavelength rectangular pulse was also obtained.The dual-wavelength rectangular pulse EDFL would benefit some potential applications,such as spectroscopy,biomedicine,and sensing research. 展开更多
关键词 LENGTH mode Dual-wavelength rectangular pulse erbium-doped fiber laser based on topological insulator saturable absorber
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Grating-free 2.8μm Er:ZBLAN fiber chirped pulse amplifier 被引量:1
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作者 Yicheng Zhou Zhipeng Qin +1 位作者 Xiabing Zhou Guoqiang Xie 《High Power Laser Science and Engineering》 SCIE CAS CSCD 2022年第6期60-65,共6页
We report on a grating-free fiber chirped pulse amplifier(CPA)at 2.8μm for the first time.The CPA system adopted Er:ZBLAN fiber with large anomalous dispersion as the stretcher and germanium(Ge)rods as the compressor... We report on a grating-free fiber chirped pulse amplifier(CPA)at 2.8μm for the first time.The CPA system adopted Er:ZBLAN fiber with large anomalous dispersion as the stretcher and germanium(Ge)rods as the compressor with a compact structure.High-energy picosecond pulses of 2.07μJ were generated at the repetition rate of 100 kHz.Using highly dispersive Ge rods,the amplified pulses were compressed to 408 fs with a pulse energy of 0.57μJ,resulting in a peak power of approximately 1.4 MW.A spectral broadening phenomenon in the main amplifier was observed,which was caused by the special gain shape of the Er:ZBLAN fiber amplifier in operation and confirmed by our numerical simulation.This compact fiber CPA system at 2.8μm will be practical and meaningful for application fields. 展开更多
关键词 Er:ZBLAN fiber fiber chirped pulse amplifier grating free MID-INFRARED
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Switchable Brillouin frequency multiwavelength and pulsed fiber laser 被引量:1
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作者 S.J.Tan H.Haris S.W.Harun 《Chinese Optics Letters》 SCIE EI CAS CSCD 2017年第10期71-75,共5页
Switchable single and double Brillouin multiwavelength and pulsed laser is successfully demonstrated. Brillouin spacing can be switched from single(0.08 nm) to double spacing(0.16 nm) or vice versa by swapping the... Switchable single and double Brillouin multiwavelength and pulsed laser is successfully demonstrated. Brillouin spacing can be switched from single(0.08 nm) to double spacing(0.16 nm) or vice versa by swapping the ports of the coupler in the proposed configuration. The proposed configuration can also be used to produce pulsed laser by inserting a home-made carbon nanotubes saturable absorber into the laser cavity. The proposed system is very versatile and flexible as it can be used as a multiwavelength laser or pulsed laser to cater for different types of applications. 展开更多
关键词 Switchable Brillouin frequency multiwavelength and pulsed fiber laser EDF OSA MWCNT
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Supercontinuum generation with 15-fs pump pulses in microstructured fiber with combination core and random cladding 被引量:3
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作者 张玉萍 郑义 +11 位作者 黄小军 王衍勇 王莉 周凯南 王晓东 郭仪 袁晓峰 周桂耀 侯蓝田 侯峙云 邢广忠 姚建铨 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第2期122-124,共3页
We demonstrate the generation of supercontinuum (SC) of over 1350 nm by injecting 790-nm, 15-fs, 74-MHz optical pulses into a 183-mm-long microstructured fiber with combination core and random cladding. The maximum to... We demonstrate the generation of supercontinuum (SC) of over 1350 nm by injecting 790-nm, 15-fs, 74-MHz optical pulses into a 183-mm-long microstructured fiber with combination core and random cladding. The maximum total power of SC is 73 mW with 290-mW pump power from 40x microscope objective. The wavelength and power ranging in SC as well as the polarization states and waveguide modes of the visible light can be tuned by adjusting the input end of MF.In particular, white light has been observed. To our knowledge, this is the first report of tunable properties in SC generation process using microstructured fiber with combination core and random cladding. 展开更多
关键词 In MF Supercontinuum generation with 15-fs pump pulses in microstructured fiber with combination core and random cladding mode SC
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Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion 被引量:7
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作者 Shuo Liu Fengping Yan +4 位作者 Yang Li Luna Zhang Zhuoya Bai Hong Zhou Yafei Hou 《Photonics Research》 SCIE EI 2016年第6期318-321,共4页
A mode-locked thulium-doped fiber laser(TDFL) based on nonlinear polarization rotation(NPR) with different net anomalous dispersion is demonstrated. When the cavity dispersion is-1.425 ps^2, the noise-like(NL) pulse w... A mode-locked thulium-doped fiber laser(TDFL) based on nonlinear polarization rotation(NPR) with different net anomalous dispersion is demonstrated. When the cavity dispersion is-1.425 ps^2, the noise-like(NL) pulse with coherence spike width of 406 fs and pulse energy of 12.342 nJ is generated at a center wavelength of 2003.2 nm with 3 dB spectral bandwidth of 23.20 nm. In the experimental period of 400 min, the 3 dB spectral bandwidth variation, the output power fluctuation, and the central wavelength shift are less than 0.06 nm, 0.04 d B, and0.4 nm, respectively, indicating that the NPR-based TDFL operating in the NL regime holds good long-term stability. 展开更多
关键词 NPR NET Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion MODE
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Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion 被引量:3
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作者 YANJIA LYU HONGXIA SHI +3 位作者 CHEN WEI HEPING LI JIANFENG LI YONG LIU 《Photonics Research》 SCIE EI 2017年第6期131-135,共5页
The pulse dynamics of harmonic mode-locking in a dissipative soliton resonance(DSR) region in an erbiumdoped fiber ring laser is investigated at different values of anomalous dispersion. The fiber laser is mode-locked... The pulse dynamics of harmonic mode-locking in a dissipative soliton resonance(DSR) region in an erbiumdoped fiber ring laser is investigated at different values of anomalous dispersion. The fiber laser is mode-locked by a nonlinear polarization rotation technique. By inserting 0–200 m anomalous dispersion single-mode fiber in the laser cavity, the cavity length is changed from 17.3 to 217.3 m, and the corresponding dispersion of the cavity ranges from -0.27 to-4.67 ps^2. The observed results show that the tuning range of repetition rate under a harmonic DSR condition is highly influenced by the cavity dispersion. Furthermore, it is found that, by automatically adjusting their harmonic orders, the lasers can work at certain values of repetition rate, which are independent of the cavity length and dispersion. The pulses at the same repetition rate in different laser configurations have similar properties, demonstrating that each achievable repetition rate represents an operation regime of harmonic DSR lasers. 展开更多
关键词 DSR Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion
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Few-layer MoS2-deposited microfiber as highly nonlinear photonic device for pulse shaping in a fiber laser [Invited] 被引量:2
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作者 Ai-Ping Luo Meng Liu +3 位作者 Xu-De Wang Qiu-Yi Ning Wen-Cheng Xu Zhi-Chao Luo 《Photonics Research》 SCIE EI 2015年第2期69-78,共10页
Two-dimensional(2D) materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, few-layer molybdenum disulfide(MoS2), as a shining 2D material, has been discovered to p... Two-dimensional(2D) materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, few-layer molybdenum disulfide(MoS2), as a shining 2D material, has been discovered to possess both the saturable absorption effect and large nonlinear refractive index. Herein, taking advantage of the unique nonlinear optical properties of MoS2, we fabricated a highly nonlinear saturable absorption photonic device by depositing the few-layer MoS2 onto the microfiber. With the proposed MoS2 photonic device, apart from the conventional soliton patterns, the mode-locked pulses could be shaped into some new soliton patterns, namely,multiple soliton molecules, localized chaotic multipulses, and double-scale soliton clusters. Our findings indicate that the few-layer MoS2-deposited microfiber could operate as a promising highlynonlinear photonic device for the related nonlinear optics applications. 展开更多
关键词 high Mo mode Few-layer MoS2-deposited microfiber as highly nonlinear photonic device for pulse shaping in a fiber laser
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Dark pulse emission in nonlinear polarization rotation-based multiwavelength mode-locked erbium-doped fiber laser 被引量:3
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作者 Zian Cheak Tiu Sin Jin Tan +1 位作者 Harith Ahmad Sulaiman Wadi Harun 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第11期119-121,共3页
We experimentally show dark pulse generation in all-normal dispersion multiwavelength erbium-doped fiber laser(EDFL) with a long cavity of figure-of-eight configuration. The EDFL generates a stable multiwavelength l... We experimentally show dark pulse generation in all-normal dispersion multiwavelength erbium-doped fiber laser(EDFL) with a long cavity of figure-of-eight configuration. The EDFL generates a stable multiwavelength laser with 0.47 nm spacing at 24 m W threshold pump power, while the number of lines obtained increases with the pump power. A dark pulse emission is observed as the pump power is increased above 137 m W, with fundamental repetition rate of 29 k Hz and pulse width of 2.7 μs. It is observed that the dark pulse train can be shifted to second-, third-, and fourth-order harmonic dark pulses by carefully adjusting the polarization controller. For the fundamental dark pulse, the maximum pulse energy of 32.4 n J is obtained at pump power of 146.0 mW. 展开更多
关键词 mode length Dark pulse emission in nonlinear polarization rotation-based multiwavelength mode-locked erbium-doped fiber laser
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44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM 被引量:3
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作者 Wanli Gao Guanyu Liu Zhigang Zhang 《Chinese Optics Letters》 SCIE EI CAS CSCD 2018年第11期58-60,共3页
44.6 fs pulses from a 257 MHz, mode-locked non-polarization maintaining Er-doped fiber laser based on a biased nonlinear amplifying loop mirror are reported. The output power is 104 mW and the single-pulse energy is 0... 44.6 fs pulses from a 257 MHz, mode-locked non-polarization maintaining Er-doped fiber laser based on a biased nonlinear amplifying loop mirror are reported. The output power is 104 mW and the single-pulse energy is 0.4 nJ. The minimum pulse duration of the direct output is 44.6 fs, which is the shortest in this kind of laser. 展开更多
关键词 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM
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