Optimizing output spectral linewidth of fiber laser utilizing phase-shifted long-period fiber grating

Jiao, Kerong; Shen, Hua; Yang, Feiyan; Wu, Xuecheng; Bian, Yinxu; Zhu, Rihong

doi:10.1016/j.optlastec.2021.107221

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…If a UV laser with higher output power is applied, the scanning speed can be appropriately increased. Furthermore, to improve the power durability of the dual-structure fiber grating, our proposed dual-annealing process, which combines constant-low-temperature and dynamic-high-temperature [13,21,22] , is adopted. The grating is first subjected to a temperature of 60 • C for 30 days to remove residual dissociative hydrogen molecules.…”

Section: Fabricationmentioning

confidence: 99%

Mitigation of stimulated Raman scattering in a high-power fiber master oscillator power amplifier laser based on a dual-structure fiber grating

Jiao,

Kong,

Guo

et al. 2023

High Pow Laser Sci Eng

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With the increasing power of fiber lasers, single chirped and tilted fiber Bragg gratings (CTFBGs) cannot completely mitigate continuously enhanced system-excited stimulated Raman scattering (SRS). Although improving the loss rate of a single CTFBG or cascading multiple CTFBGs can provide better suppression of the stronger SRS, excessive insertion loss may cause significant attenuation of the output power. Confronting the challenge, we firstly present an SRS mitigation method based on a dual-structure fiber grating in this paper. The dual-structure fiber grating comprises a CTFBG and a fiber Bragg grating structure, which were designed and fabricated on a passive 25/400 double-clad fiber. To evaluate the performance of the grating, a 3 kW fiber master oscillator power amplifier laser is established. The experimental results demonstrate that the SRS mitigation rate of the grating is greater than 30 dB (99.9%), whereas the insertion loss is only approximately 3%, thus allowing for minimal deterioration of the output power. This solves the contradiction between high suppression rate and high insertion loss faced by CTFBGs, which in turn makes dualstructure fiber gratings particularly suitable for mitigating SRS in 3-5 kW high-power fiber lasers.

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Section: Fabricationmentioning

confidence: 99%

Mitigation of stimulated Raman scattering in a high-power fiber master oscillator power amplifier laser based on a dual-structure fiber grating

Jiao,

Kong,

Guo

et al. 2023

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…Additional advantages are their ease of implementation for both point and quasi-distributed measurements, their adaptability to a wide variety of applications such as those in the oil and gas sectors or electromagnetic environments, and their cost-effectiveness. The intrigue in fiber gratings, which are characterized by a periodic modulation of the refractive index within the core or cladding of a fiber along its direction of propagation, has been widespread among scholars globally [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These fiber gratings are categorically divided based on their operational principles into two main types: fiber Bragg gratings (FBGs) and long-period fiber gratings (LPFGs).…”

Section: Introductionmentioning

confidence: 99%

Mechanically Induced Long-Period Fiber Gratings and Applications

Ran,

Chen,

Wang

et al. 2024

Photonics

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Long-period fiber gratings (LPFGs) functioning as band-reject filters have played a pivotal role in the realm of optical communication. Since their initial documentation in 1996, LPFGs have witnessed rapid advancements in areas such as optical sensing, the equalization of optical amplification, and optical band-pass filtering, etc. The unique attributes of optical fiber-based grating, including their miniaturized size, cost-effectiveness, and immunity to electromagnetic interference, have contributed significantly to various sectors over the last two decades. This paper presents a review of the evolution of LPFGs, with a specific focus on the progression and current trends of mechanically induced long-period fiber gratings. It offers a concise overview of coupled-mode theory, the fabrication processes, the merits, and the limitations associated with mechanically induced LPFGs. Moreover, this review elucidates the application methodologies of mechanically induced LPFGs and anticipates future directions in this field.

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Spacing mode multi-wavelength erbium doped fiber laser based on a symmetrical long-period fiber grating

Contreras-Teran,

Gallegos-Arellano,

Jauregui-Vazquez

et al. 2024

Phys. Scr.

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We present a multi-wavelength erbium-doped fiber laser based on a symmetrical long-period fiber grating (LPFG) with spacing mode between single lasing mode and multiwavelength spectra. The LPFG was manufactured by thermal expansion technique using a LZM-100 glass processing system equipped with a CO2 laser, and was used as a wavelength-selective filter (WSF) in the laser ring. The laser can emit a single, double, triple, quadruple, quintuple, or sextuple lines in the range from 1546 to 1563 nm, that can be tunable by controlling the radius of curvature of the LPFG in the range 0-0.2662 m -1. A minimal spacing mode of 1.92 nm was observed in the multi-wavelength region; meanwhile the fiber laser offers an average spacing mode of 6.945 nm between the multi-wavelength region and the single emission. This laser has a 3 dB linewidth of 0.11 nm and a side mode suppression ratio (SMSR) of 55.56 dB. Finally, according to experimental results, the laser has high wavelength stability at room temperature for 88 min.

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Optimizing output spectral linewidth of fiber laser utilizing phase-shifted long-period fiber grating

Cited by 6 publications

References 23 publications

Mitigation of stimulated Raman scattering in a high-power fiber master oscillator power amplifier laser based on a dual-structure fiber grating

Mitigation of stimulated Raman scattering in a high-power fiber master oscillator power amplifier laser based on a dual-structure fiber grating

Mechanically Induced Long-Period Fiber Gratings and Applications

Spacing mode multi-wavelength erbium doped fiber laser based on a symmetrical long-period fiber grating

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