500-nm broadband light generation in highly nonlinear dispersion shifted fiber by soliton laser

Hui, Zhanqiang; Zhang, Xiaoli; Xu, Wei; Li, Na; Li, Xiaohui

doi:10.1016/j.optlastec.2022.108712

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Laser protective material technology utilizes linear materials, 5,6 nonlinear materials, [7][8][9][10] and phase change materials [11][12][13][14] to make light filters for the protection of photoelectric imaging devices, which is a relatively common laser protection method; however, so far, there are still disadvantages, such as narrow protective bandwidth, slow reaction speed, and low protective strength. 15 At the same time, the increasing power and wavelength broadening of lasers [16][17][18] make laser protection of photoelectric imaging systems more difficult. Researchers also study new technologies, such as computational imaging, including light field imaging, wavefront coding imaging (WFCI), etc., which is expected to make up for the lack of laser protection materials and improve the laser protection ability of photoelectric imaging systems.…”

Section: Introductionmentioning

confidence: 99%

Laser protection by using vortex wavefront coding imaging system

Li,

Luo,

et al. 2024

AIP Advances

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Laser blindness can reduce or disable the information acquisition ability of photoelectric imaging systems. In this paper, numerical simulation and experimental verification are both performed to systematically study the laser protection performance of the vortex phase mask. First, the imaging model and laser transmission model of the vortex wavefront coding imaging system are introduced in detail. Then, the experimental setup of the imaging system is built, and the imaging result of the imaging system is obtained. Finally, the influence of propagation distance on the maximum single-pixel receiving power and suppression ratio of the imaging system is measured experimentally. The simulation and experimental results both show that the energy suppression ratio of this method can reach more than two orders of magnitude compared with the conventional imaging system, and the probability of laser blindness can be effectively reduced.

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Section: Introductionmentioning

confidence: 99%

Laser protection by using vortex wavefront coding imaging system

Li,

Luo,

et al. 2024

AIP Advances

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Theoretical design of an ultra-broadband all-fiber filter covering O+E+S+C+L+U communication band based on cascaded tilted long-period fiber gratings near phase-matching turning point

Wang,

Gu,

Ling

et al. 2024

J. Opt. Soc. Am. B

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In this paper, a novel, to the best of our knowledge, ultra-broadband all-fiber filter is proposed and designed, which is composed of two (or more) continuously tilted long-period fiber gratings (TLPFGs) with different grating tilt angles and the same actual period. For the filter constructed with two TLPFGs, one TLPFG is operated in a dual-peak resonance state to produce two resonance peaks, and the other TLPFG is operated at the phase-matched turning point to produce a broadband resonance peak. The three resonance peaks are superimposed, resulting in a large broadband peak. Based on the mode coupling theory, the effects of structural parameters such as grating axial period, actual period, tilt angle, and grating length on the characteristics of this filter are analyzed, and an effective method for selecting structural parameters is given. The simulation results show that when the actual period of the two TLPFGs is 170 µm, the tilt angles are 21.961° and 19.639°, and the grating lengths are 0.95 cm and 0.96 cm, respectively, the filter bandwidth can reach up to 440 nm, which can cover the E–U bands. In addition, cascaded multiple TLPFG ultra-broadband filters with different tilt angles are discussed. The cascaded multiple segment TLPFG filter can realize ultra-broadband filtering in the range of 1200–2000 nm, and easily covers the O–U bands. The all-fiber optic filter proposed in this paper has the advantages of simple structure, easy production, low cost, and high filtering capability, which makes it competitive in communication and sensor systems.

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