A high-power LD-pumped linearly polarized Yb-doped fiber laser operating at 1152 nm with 42 GHz narrow linewidth and 18 dB PER

Huang, Long; Zhang, Hanwei; Wang, Xiaolin; Su, Rongtao; Zhang, Pu

doi:10.1088/1054-660x/26/7/075105

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…However, the FW ASE remains below 500 mW. The performance of our main amplifier is on-par with similar works [13,14]. A stronger seed power would however be helpful to further improve efficiency.…”

supporting

confidence: 62%

“…Yb-doped fiber lasers have already been demonstrated at these exotic wavelengths. With a long cavity of large mode area (LMA) fiber between two fiber Bragg gratings (FBG), several hundreds of Watts of output power have been obtained beyond 1100 nm [12][13][14]. Because of the low emission cross-section, it is necessary to deal with the strong gain competition between signal and amplified spontaneous emission (ASE) around 1030 nm.…”

mentioning

confidence: 99%

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25 W single-frequency, low noise fiber MOPA at 1120 nm

Gouhier¹,

Guiraud²,

Rota-Rodrigo³

et al. 2018

Opt. Lett.

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This Letter reports on the development of a 25 W single-frequency, all-fiber master oscillator power amplifier (MOPA) operating at 1120 nm. By heating the gain fiber at 75°C, an output power of 25.3 W is achieved with an optical-to-optical efficiency of 53.5%. The output shows no sign of stimulated Brillouin scattering and the signal to amplified spontaneous emission ratio is close to 40 dB. A M value of 1.15 and a polarization extinction ratio of 17 dB are measured. The relative intensity noise of the output is also characterized, reaching -155 dBc/Hz at 10 MHz at the maximum output power. The study of the noise dynamics highlights, for the first time to the best of our knowledge, an unpredicted behavior due to the strong backward amplified spontaneous emission.

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supporting

confidence: 62%

mentioning

confidence: 99%

25 W single-frequency, low noise fiber MOPA at 1120 nm

Gouhier¹,

Guiraud²,

Rota-Rodrigo³

et al. 2018

Opt. Lett.

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“…According to previously reported investigations [37][38][39], the characteristic frequency components are typical evidence for the generation of thermal-induced mode instability (MI). Furthermore, the threshold of MI can be enhanced effectively with the optimization of the pump wavelength and the employment of specially designed gain fibers [40,41].…”

Section: Power Scalability Of the Narrowband Seedmentioning

confidence: 91%

“…As depicted in the insertion graph of figure 3(b), negligible residual 976 nm pump light of the main amplifier and 1036.5 nm pump laser of the narrowband RFL can be observed in the amplified random laser with amplitudes of 38.7 dB and 35.8 dB lower than the optical peak of the narrowband random laser. Furthermore, no optical peak corresponding to the 2nd order Stokes light can be observed in the output light, as the relatively long wavelength component cannot be amplified effectively by the YDF based amplifier [37] compared with the narrowband random laser and broadband spontaneous Raman emission component around 1081 nm. Additionally, the result of the numerical integration shows that 83.19% of the output power is within the central peak (1081.2 nm-1081.6 nm), which is almost the same with the proportion of narrowband seed.…”

Section: Power Scalability Of the Narrowband Seedmentioning

confidence: 99%

Power scalability of a linearly-polarized narrowband random fiber laser in an all-fiber MOPA structure with 0.1 nm linewidth

Huang

et al. 2017

Laser Phys. Lett.

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In this manuscript, we demonstrate an all-fiberized master-oscillation-power-amplifier (MOPA) structured linearly-polarized narrowband random laser. The seed source is a narrowband random-polarized random fiber laser (RFL) in a half-opened cavity with a maximum output power of 0.981 W and a linewidth of 0.1 nm. Utilizing a polarizationdependent isolator as a polarizer, a linearly-polarized narrowband seed laser can be obtained. As for the main amplifier, a pump-limited 381.1 W amplified linearly-polarized narrowband random laser can be achieved with a linewidth of 0.13 nm (33.36 GHz) and a polarization degree of 92.33% (~11 dB). The performance of the system is limited by the generation of mode instability (MI) effects, and hence, the worsening of temporal stability and the reduction of beam quality. Furthermore, significant tail broadening of the output spectrum can be measured. As the output and backward powers increase monotonously with the boosting of pump power, we conclude that further power scaling of this system with good linewidth, polarization, beam quality and temporal stability performance can be achieved with effective mitigation of the MI effect. This work can expand our comprehension on the spectral evolution property of RFL in the power scaling process and provide a possible solution for the obtaining of powerful linearly-polarized narrowband fiber source.

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“…High power narrow-linewidth fiber lasers operating at 1100-1200 nm have been highly desired for second harmonic generation to further obtain laser sources operating at the yellow-green spectral region [1][2][3][4][5][6]. Beneficial from the wide gain spectra of ytterbium (Yb) ions in the silica host (976-1200 nm) [7], directly using sole Yb-ions gain is a simple approach to achieve narrow-linewidth emissions at longer wavelength [2,[8][9][10]. However, due to the strong amplified spontaneous emission (ASE) and the following destructive self-oscillation [11], this approach has becoming sparse with further power scaling.…”

Section: Introductionmentioning

confidence: 99%

Kilowatt-level ytterbium-Raman fiber amplifier with a narrow-linewidth and near-diffraction-limited beam quality

Miao

Liu

et al. 2020

Opt. Lett.

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By focusing on a typical emitting wavelength of 1120 nm as an example, we present the first demonstration of a high-efficiency, narrow-linewidth kilowatt-level all-fiber amplifier based on hybrid ytterbium-Raman (Yb-Raman) gains. Notably, two temporally stable, phase-modulated single-frequency lasers operating at 1064 nm and 1120nm, respectively, were applied in the fiber amplifier, to alleviate the spectral broadening of the 1120 signal laser and suppress the stimulated Brillouin scattering (SBS) effect simultaneously. Over 1 kW narrow-linewidth 1120 nm signal laser was obtained with a slope efficiency of ~ 77% and a beam quality of M2~1.21. The amplified spontaneous emission (ASE) noise in the fiber amplifier was effectively suppressed by incorporating an ASE-filtering system between the seed laser and the main amplifier. Further examination of the influence of power ratios between the two seed lasers on the conversion efficiency had proved that the presented amplifier could work efficiently when the power ratio of 1120 nm seed laser ranged from 31% to 61%. Overall, this setup could provide a well reference for obtaining high power narrow-linewidth fiber lasers operating within 1100-1200 nm.

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A high-power LD-pumped linearly polarized Yb-doped fiber laser operating at 1152 nm with 42 GHz narrow linewidth and 18 dB PER

Cited by 10 publications

References 33 publications

25 W single-frequency, low noise fiber MOPA at 1120 nm

25 W single-frequency, low noise fiber MOPA at 1120 nm

Power scalability of a linearly-polarized narrowband random fiber laser in an all-fiber MOPA structure with 0.1 nm linewidth

Kilowatt-level ytterbium-Raman fiber amplifier with a narrow-linewidth and near-diffraction-limited beam quality

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