Multi-wavelength fiber laser based on self-seed light amplification and wavelength-dependent gain

Luo, Yiyang; Xia, Li; Sun, Qizhen; Wei, Li; Ran, Yanli; Liu, Deming

doi:10.1016/j.optcom.2014.10.066

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…These results suggest that when two lasers having similar frequencies are incident on the HEGS sample, most energies are transferred to the centered non-absorption band and significantly amplify the signal in the range of 824.4 nm to 862.9 nm. For the dual-wavelength pump with the excitation at 874.9 nm, the blue-shifted BPAWR-SCAM signal between 824.4 nm and 862.9 nm can serve as a seed light 48 , and it greatly amplifies the red-shifted BPAWR-SACM signal by the pump at 804.2 nm. As a result, the signal amplification occurred at the centered non-absorption band, which included amplification from the red-shifted BPAWR-SACM signal created by the pump at 804.2 nm and the blue-shifted BPAWR-SACM signal created by the excitation at 874.9 nm.…”

Section: Resultsmentioning

confidence: 99%

Design of coherent wideband radiation process in a Nd3+-doped high entropy glass system

Zhang

Wang³

et al. 2022

Light Sci Appl

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We discover that the spatially coherent radiation within a certain frequency range can be obtained without a common nonlinear optical process. Conventionally, the emission spectra were obtained by de-exciting excited centers from real excited energy levels to the ground state. Our findings are achieved by deploying a high-entropy glass system (HEGS) doped with neodymium ions. The HEGS exhibits a much broader infrared absorption than common glass systems, which can be attributed to be high-frequency optical branch phonons or allowable multi-phonon processes caused by phonon broadening in the system. A broadened phonon-assisted wideband radiation (BPAWR) is induced if the pump laser is absorbed by the system. The subsequent low-threshold self-absorption coherence modulation (SACM) can be controlled by changing excitation wavelengths, sample size, and doping concentrations. The SACM can be red-shifted through the emission of phonons of the excited species and be blue-shifted by absorbing phonons before they are de-excited. There is a time delay up to 1.66 ns between the pump pulse and the BPAWR when measured after traveling through a 35 mm long sample, which is much longer than the Raman process. The BPAWR-SACM can amplify the centered non-absorption band with a gain up to 26.02 dB. These results reveal that the shift of the novel radiation is determined by the frequency of the non-absorption band near the absorption region, and therefore the emission shifts can be modulated by changing the absorption spectrum. When used in fiber lasers, the BPAWR-SACM process may help to achieve tunability.

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Section: Resultsmentioning

confidence: 99%

Design of coherent wideband radiation process in a Nd3+-doped high entropy glass system

Zhang

Wang³

et al. 2022

Light Sci Appl

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“…The technique of nonlinear polarization rotation (NPR) effect through the intensity-dependent loss (IDL) mechanism is necessary to suppress this mode competition [13,14]. The NPR effect is formed from the combination of a polarization controller (PC), highly nonlinear fiber (HNLF), and polarizer which balances the oscillation and produces a stable multiwavelength output [15]. The generation of a stable multiwavelength spectrum is possible with the use of an optical amplifier and a comb filter in the ring cavity setup to stabilize the output laser.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rayleigh backscattering on the multiwavelength random fiber laser bandwidth

et al. 2023

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We investigated the effect of Rayleigh backscattering on the bandwidth of a multiwavelength random fiber laser (MWRFL). This MWRFL is based on an erbium-doped fiber amplifier (EDFA) as the gain medium and a Lyot filter as the wavelength-selective device. A high number and stable lasing line is generated with the assistance of a nonlinear polarization rotation effect induced by highly nonlinear fiber (HNLF) and optimized by a polarization controller. Longer single-mode fiber (SMF) produces wider multiwavelength bandwidth as compared to shorter SMF lengths, as 10 km, 3 km, and 0.1 km obtained 6.24 nm, 5.76 nm, and 2.75 nm wavelength bandwidth, respectively. When the SMF is removed from the setup, no Rayleigh backscattering is provided in the cavity, which led to a narrower multiwavelength bandwidth of 2.69 nm. Subsequently, the alteration of EDFA power, half-wave plate (HWP) angle, and quarter-wave plate (QWP) angles affected the degradation of multiwavelength performance. The best output spectrum is achieved at an EDFA power of 18 dBm, a HWP angle of 60°, and a QWP angle of 105°. The laser stability over a period of 120 minutes was excellent with a peak power deviation of 1.33 dB.

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“…Switchable and tunable lasers have attracted more and more attention of scholars in recent years, both domestic and foreign, for their application in numerous fields, such as laser radar, radio systems, dense wavelength division multiplexing optical fiber communication systems, optical fiber sensing, detectors, microwave, terahertz wave signal generation and spectroscopy [1][2][3][4][5][6]. In particular, fiber Bragg gratings (FBGs) and special FBGs show great application potential in switchable and tunable erbium-doped fiber lasers (EDFLs), for example, chirped FBG [7,8], polarization-maintaining FBG (PM-FBG) [9], phase-shifted FBG [10], tilted fiber Bragg * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Switchable and tunable linear cavity erbium-doped fiber laser based on FBGs embedded in Sagnac rings

Yan¹,

Zhang²,

Jiang³

et al. 2021

Laser Phys.

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A switchable and tunable erbium-doped fiber laser with a linear cavity based on fiber Bragg gratings embedded in Sagnac rings is proposed and experimentally verified. Due to the stress birefringence effect and the polarized hole burning effect, which are introduced into the single-mode fiber in the polarization controllers (PCs) by the PCs, the designed laser can achieve seven kinds of laser-states output including three kinds of single-wavelength laser states, three kinds of dual-wavelength laser states and one kind of triple-wavelength laser state. The optical signal-to-noise ratios of the output wavelengths are all higher than 52 dB, and the wavelength shifts are all less than 0.04 nm. Furthermore, the temperature tuning of the wavelength range is also researched, which is about 1.2 nm. Due to advantages, such as low cost, simple structure, easy switching and multiple laser states, the designed laser has great application potential in laser radar, optical fiber sensing and so on.

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Multi-wavelength fiber laser based on self-seed light amplification and wavelength-dependent gain

Cited by 10 publications

References 15 publications

Design of coherent wideband radiation process in a Nd3+-doped high entropy glass system

Design of coherent wideband radiation process in a Nd3+-doped high entropy glass system

Effect of Rayleigh backscattering on the multiwavelength random fiber laser bandwidth

Switchable and tunable linear cavity erbium-doped fiber laser based on FBGs embedded in Sagnac rings

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