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Lasers and Laser Optics
Generation of 131 fs mode-locked pulses from 2.8 μm Er:ZBLAN fiber laser
Download:996次
Hongan Gu
Zhipeng Qin
Guoqiang Xie
*
Ting Hai
[ ... ]
Liejia Qian
Author Affiliations
Abstract
School of Physics and Astronomy, Key Laboratory for Laser Plasmas (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
We demonstrated a femtosecond mode-locked Er:ZrF
4
-BaF
2
-LaF
3
-AlF
3
-NaF (Er:ZBLAN) fiber laser at 2.8 μm based on the nonlinear polarization rotation technique. The laser generated an average output power of 317 mW with a repetition rate of 107 MHz and pulse duration as short as 131 fs. To the best of our knowledge, this is the shortest pulse generated directly from a mid-infrared mode-locked Er:ZBLAN fiber laser to date. Numerical simulation and experimental results confirm that reducing the gain fiber length is an effective way to shorten the mode-locked pulse duration in the Er:ZBLAN fiber laser. The work takes an important step towards sub-100-fs mid-infrared pulse generation from mode-locked Er:ZBLAN fiber lasers.
generation
mode-locked pulses
Er:ZBLAN fiber
PDF全文
Full Text
Chinese Optics Letters
2020, 18(3): 031402
Letters
Mode-locked 2.8-
μ
m fluoride fiber laser: from soliton to breathing pulse
Download:831次
Zhipeng Qin
1,2,3
Guoqiang Xie
1,2,3,*
Hongan Gu
1,2,3
Ting Hai
1,2,3
[ ... ]
Liejia Qian
1,2,3,*
Author Affiliations
Abstract
1
Shanghai Jiao Tong University, School of Physics and Astronomy, Shanghai, China
2
Shanghai Jiao Tong University, Collaborative Innovation Center of Inertial Fusion Sciences and Applications, Shanghai, China
3
Shanghai Jiao Tong University, Key Laboratory for Laser Plasmas, Ministry of Education, Shanghai, China
The mode-locked fluoride fiber laser (MLFFL) is an exciting platform for directly generating ultrashort pulses in the mid-infrared (mid-IR). However, owing to difficulty in managing the dispersion in fluoride fiber lasers, MLFFLs are restricted to the soliton regime, hindering pulse-energy scaling. We overcame the problem of dispersion management by utilizing the huge normal dispersion generated near the absorption edge of an infrared-bandgap semiconductor and promoted MLFFL from soliton to breathing-pulse mode-locking. In the breathing-pulse regime, the accumulated nonlinear phase shift can be significantly reduced in the cavity, and the pulse-energy-limitation effect is mitigated. The breathing-pulse MLFFL directly produced a pulse energy of 9.3 nJ and pulse duration of 215 fs, with a record peak power of 43.3 kW at 2.8 μm. Our work paves the way for the pulse-energy and peak-power scaling of mid-IR fluoride fiber lasers, enabling a wide range of applications.
ultrafast fiber laser
mid-infrared
breathing pulse
mode-locking
dispersion management
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Advanced Photonics
2019, 1(6): 065001
Photonics based on 2D noncarbon materials
2 μm mode-locking laser performances of sol-gel-fabricated large-core Tm-doped silica fiber
Yan Ren
1
Zhipeng Qin
1
Guoqiang Xie
1,*
Zhen Qiao
1
[ ... ]
Lili Hu
2
Author Affiliations
Abstract
1
Key Laboratory for Laser Plasmas of the Ministry of Education, Collaborative Innovation Center of IFSA (CICIFSA), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2
Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
High-power ultrafast fiber lasers operating at the 2 μm wavelength are extremely desirable for material processing, laser surgery, and nonlinear optics. Here we fabricated large-core (LC) double-cladding Tm-doped silica fiber via the sol-gel method. The sol-gel-fabricated Tm-doped silica (SGTS) fiber had a large core diameter of 30 μm with a high refractive index homogeneity (
Δ
n
=
2
×
10
4
). With the newly developed LC SGTS fiber as the gain fiber, high-power mode-locking was realized. By using a semiconductor saturable absorber mirror (SESAM) as a mode locker, the LC SGTS fiber oscillator generated mode-locked pulses with an average output power as high as 1.0 W and a pulse duration of 23.9 ps at the wavelength of 1955.0 nm. Our research results show that the self-developed LC Tm-doped silica fiber via the sol-gel method is a promising gain fiber for generating high-power ultrafast lasers in the 2 μm spectral region.
060.2290
Fiber materials
060.3510
Lasers, fiber
140.4050
Mode-locked lasers
PDF全文
Full Text
Chinese Optics Letters
2018, 16(2): 020020
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