Fiber Amplifiers and Fiber Lasers

10.1142/9344 ◽  
2014 ◽  
Author(s):  
Niloy K Dutta
Keyword(s):  
Fiber Lasers ◽  
Fiber Amplifiers

scholarly journals Mitigation of stimulated Raman scattering in kilowatt-level diode-pumped fiber amplifiers with chirped and tilted fiber Bragg gratings

2019 ◽  
Vol 7 ◽  
Author(s):  
Meng Wang ◽  
Le Liu ◽  
Zefeng Wang ◽  
Xiaoming Xi ◽  
Xiaojun Xu
Keyword(s):  
Raman Scattering ◽  
Fiber Lasers ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Average Power ◽  
Fiber Amplifiers ◽  
Maximum Output ◽  
Power Scaling ◽  
Diode Pumped ◽  
Stimulated Raman

The average power of diode-pumped fiber lasers has been developed deeply into the kW regime in the past years. However, stimulated Raman scattering (SRS) is still a major factor limiting the further power scaling. Here, we have demonstrated the mitigation of SRS in kilowatt-level diode-pumped fiber amplifiers using a chirped and tilted fiber Bragg grating (CTFBG) for the first time. The CTFBG is designed and inscribed in large-mode-area (LMA) fibers, matching with the operating wavelength of the fiber amplifier. With the CTFBG inserted between the seed laser and the amplifier stage, an SRS suppression ratio of ${\sim}10~\text{dB}$ is achieved in spectrum at the maximum output laser power of 2.35 kW, and there is no reduction in laser slope efficiency and degradation in beam quality. This work proves the feasibility and practicability of CTFBGs for SRS suppression in high-power fiber lasers, which is very useful for the further power scaling.

Novel oxyfluoride glass and transparent glass-ceramics for fiber lasers and fiber amplifiers

2010 ◽  
Author(s):  
Takenobu Suzuki ◽  
Shin-ichiro Masaki ◽  
Kento Mizuno ◽  
Yasutake Ohishi
Keyword(s):  
Fiber Lasers ◽  
Glass Ceramics ◽  
Fiber Amplifiers ◽  
Oxyfluoride Glass ◽  
Transparent Glass

scholarly journals Fiber Amplifiers and Fiber Lasers Based on Stimulated Raman Scattering: A Review

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 247 ◽  
Author(s):  
Luigi Sirleto ◽  
Maria Antonietta Ferrara
Keyword(s):  
High Power ◽  
Communication Systems ◽  
Fiber Lasers ◽  
Near Infrared ◽  
High Efficiency ◽  
Stimulated Raman Scattering ◽  
Spectral Band ◽  
High Capacity ◽  
Raman Laser ◽  
Fiber Amplifiers

Nowadays, in fiber optic communications the growing demand in terms of transmission capacity has been fulfilling the entire spectral band of the erbium-doped fiber amplifiers (EDFAs). This dramatic increase in bandwidth rules out the use of EDFAs, leaving fiber Raman amplifiers (FRAs) as the key devices for future amplification requirements. On the other hand, in the field of high-power fiber lasers, a very attractive option is provided by fiber Raman lasers (FRLs), due to their high output power, high efficiency and broad gain bandwidth, covering almost the entire near-infrared region. This paper reviews the challenges, achievements and perspectives of both fiber Raman amplifier and fiber Raman laser. They are enabling technologies for implementation of high-capacity optical communication systems and for the realization of high power fiber lasers, respectively.

Broadband fiber lasers using bismuth-oxide-based erbium-doped fiber amplifiers

2004 ◽  
Author(s):  
Hideyuki Sotobayashi ◽  
Juliet T. Gopinath ◽  
Jason W. Sickler ◽  
Erich P. Ippen
Keyword(s):  
Bismuth Oxide ◽  
Fiber Lasers ◽  
Fiber Amplifiers ◽  
Erbium Doped
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