- 标题
- 摘要
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- 实验方案
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Robust 1.7-μm, all-polarization-maintaining femtosecond fiber laser source based on standard telecom fibers
摘要： We demonstrate a compact 1.7-μm all-polarization-maintaining (PM) ultrafast fiber laser source, which employs soliton self-frequency shift (SSFS) in an optical fiber as the dominant spectral-shifting mechanism. The laser generates stable pulses with 384 fs pulse width and 102 MHz repetition rate centered at 1.7 μm with 7 nm spectral bandwidth. The average power is about 35 mW with a high conversion efficiency of 66 %. The measured root mean square (RMS) output power stability over 10 hours is as low as 0.22 %. Both experimental and simulation results demonstrate that this laser has a potential to improving multiphoton imaging depth.
关键词： all-polarization-maintaining,multiphoton imaging,femtosecond fiber laser,soliton self-frequency shift,1.7-μm
更新于2025-11-28 14:23:57
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2.01～ 2.42 μm all-fiber femtosecond Raman soliton generation in a heavily germanium doped fiber
摘要： We demonstrated that an all-fiber system generates high-performance mid-infrared Raman solitons in a heavily germanium doped fiber (HGDF). A 10 m-long HGDF with a 12 μm core diameter and 64 mol.% GeO2 dopant is designed and pumped by a home-made 1.96 μm femtosecond fiber laser in the strong anomalous dispersion region. Stable and single-color Raman solitons are therefore obtained with a continuous wavelength tunability from 2.01 to 2.42 μm. The pulse duration of the mid-infrared Raman solitons can be as short as ~220 fs. The efficiency of energy transfer to a Raman soliton is about 32.5%, while the maximum average power, peak power and pulse energy are up to 27 mW, 3.6 kW and ~1 nJ, respectively. Different from previous multi-color Raman or supercontinuum-like generation from HGDFs pumped in the near-zero or normal dispersion regime, such pure mid-infrared Raman solitons exhibit excellent stability with a radio-frequency signal-to-noise ratio of ~60 dB. This is, to the best of our knowledge, the first demonstration of >2.4 μm stable Raman solitons in an all-fiber system. This work may pave a path towards compact and high-performance mid-infrared femtosecond fiber laser sources.
关键词： soliton self-frequency shift,Ultrafast fiber lasers,heavily germanium doped fiber,mid-infrared
更新于2025-09-23 15:22:29
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Soliton Self-Frequency Shift in Mode Locked Fiber Lasers
摘要： We propose and demonstrate the soliton evolution in a mode locked Er-doped fiber laser with intra-cavity soliton self-frequency shift by numerical simulation, and analyze effects of different parameters including of pump strength, length of dispersion shift fiber (DSF), and modulation depth of saturable absorber in detail for the first time. The results show that once the stable output pulse is formed, the frequency shift amount would increase with increasing the pump strength or decreasing the length of DSF and the modulation depth.
关键词： fiber lasers,red shift,Soliton self-frequency shift,mode locked pulse
更新于2025-09-16 10:30:52
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - All-Fiber System at 1750 nm Delivering 35 fs 230 kW Peak Power Pulses
摘要： Ultra-short (<70 fs) pulses in the short-wavelength infrared (>1.55 μm) are very attractive for many applications such as three-photon microscopy1, frequency metrology2, or high harmonic generation3. Solitonic self-compression is an attractive effect for this purpose as compression to sub-50 fs pulses can be achieved without the need for external compressing optics, directly out of an optical fiber. Self-compression at high energy was demonstrated around 2 μm in all-solid4 or gas-filled5 hollow-core-PCFs. However, the latter demonstrations were restricted to Tm emission band in order to reach the soliton self-compression effect in low-nonlinearity media. In this communication, we present a compact monolithic all-fiber source of ultrashort (35 fs) pulses emitting outside conventional lasing bands, from 1.65 to 2 μm based on Raman-induced soliton self-frequency shift (SSFS) and soliton self-compression (SSC).
关键词： ultra-short pulses,soliton self-compression,Raman-induced soliton self-frequency shift,solitonic self-compression,short-wavelength infrared
更新于2025-09-11 14:15:04
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Broadband tunable Raman soliton self-frequency shift to mid-infrared band in a highly birefringent microstructure fiber
摘要： Raman soliton self-frequency shifted to mid-infrared band (λ > 2 μm) has been achieved in an air-silica microstructure ?ber (MF). The MF used in our experiment has an elliptical core with diameters of 1.08 and 2.48 μm for fast and slow axis. Numerical simulation shows that each fundamental orthogonal polarization mode has two wide-spaced λZDW and the λZDW pairs located at 701/2110 nm and 755/2498 nm along the fast and slow axis, respectively. Using 810-nm Ti:sapphire femtosecond laser as pump, when the output power varies from 0.3 to 0.5 W, the furthest red-shift Raman solitons in both fast and slow axis shift from near-infrared band to mid-infrared band, reaching as far as 2030 and 2261 nm. Also, mid-infrared Raman solitons can always be generated for pump wavelength longer than 790 nm if output pump power reaches 0.5 W. Speci?cally, with pump power at 0.5 W, the mid-infrared soliton in slow axis shifts from 2001 to 2261 nm when the pump changes from 790 nm to 810 nm. This means only a 20 nm change of pump results in 260 nm tunability of a mid-infrared soliton.
关键词： microstructure ?ber,soliton self-frequency shift,Raman soliton,mid-infrared
更新于2025-09-10 09:29:36