Arbitrarily switchable multi-wavelength Yb-doped fiber lasers with phase-shifted long-period fiber grating

Liu, S. X.; Wang, C. H.; Zhu, Xinen; Bu, Chenxi; Zhang, G. J.

doi:10.1134/s1054660x12070080

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…We define θ as the angle between the polarization direction of the input light and the fast axis of the SMF, and β as the angle between the fast axes of the SMF and the polarizer. The transmission characteristic of the NPR can be obtained [21]:…”

Section: Experimental Setup and Principlementioning

confidence: 99%

Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion

Liu

Yan

et al. 2016

Photon. Res.

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A mode-locked thulium-doped fiber laser (TDFL) based on nonlinear polarization rotation (NPR) with different net anomalous dispersion is demonstrated. When the cavity dispersion is −1.425 ps 2 , the noise-like (NL) pulse with coherence spike width of 406 fs and pulse energy of 12.342 nJ is generated at a center wavelength of 2003.2 nm with 3 dB spectral bandwidth of 23.20 nm. In the experimental period of 400 min, the 3 dB spectral bandwidth variation, the output power fluctuation, and the central wavelength shift are less than 0.06 nm, 0.04 dB, and 0.4 nm, respectively, indicating that the NPR-based TDFL operating in the NL regime holds good long-term stability.

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Section: Experimental Setup and Principlementioning

confidence: 99%

Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion

Liu

Yan

et al. 2016

Photon. Res.

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show abstract

“…These results indicate not only a high monochromaticity of the laser, but also high stability during all the 60 min of scanning time. Here it is important to point out that, with the change of the polarization state in the cavity via changing achieving by the polarization controller (PC), the variation of transmissions/losses at different wavelengths differs, which result in the selective oscillation at the less loss wavelengths [55]. Hence, when the PC is adjusted, the polarization state shifts the symmetric coupling mode and as a result, the resonant wavelength of the LPFG is changed.…”

Section: Single Laser Emissionmentioning

confidence: 99%

“…However, the disadvantages of MLPFG are high sensitivity to ambient temperature, and high insertion losses, often in the order of 0.2 -0.3 dB [54]. Another laser based on a phase-shifted LPFG is described in [55], in which dual and triple wavelength lines, with a SMSR of 40 dB were obtained.…”

Section: Introductionmentioning

confidence: 99%

Switchable Ytterbium Fiber Laser Based on a Symmetrical Long-Period Fiber Grating

et al. 2021

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In this study, a switchable ytterbium-doped fiber laser based on symmetrical long-period fiber grating (LPFG) is presented. The LPFG is used as a wavelength-selective filter (WSF). Utilizing this WSF, the laser can emit one, two, or multiple stable output beams by adjusting the temperature on the LPFG from 20 °C to 600 °C. In addition, switching is also possible by adjusting the curvature of the LPFG from 0.399 to 0.709 m -1 . The symmetrical LPFG was fabricated by combining the cladding shaping with the thermal core expansion techniques by using a CO2-laser LZM-100 glass-processing system. The experimental results show a side-mode suppression ratio (SMSR) of 49 dB and a linewidth of 0.06 nm, within the range from 1038 to 1080 nm. In conclusion, the main achievement of this switchable laser is the high SMSR and stable output for high values of temperature, using a repeatable, simple, easy construction, and cost-effective laser tuning technique.

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“…The polarization state dependent angle θ can be changed by the PMF and the PC. Thus the reflectivity of the NPR-based fiber loop mirror can be expressed as follows [12]:…”

Section: Experimental Setup and Principlementioning

confidence: 99%

A multiwavelength thulium-doped silica fiber laser incorporating a highly nonlinear fiber

Liu

Yan

et al. 2014

J. Opt.

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A multiwavelength Tm3+-doped silica fiber laser incorporating a highly nonlinear fiber is presented. In the laser cavity, a nonlinear polarization rotation (NPR) based fiber loop mirror is used to overcome the mode competition and a polarization-maintaining fiber Sagnac loop mirror is used as the filter. The 150 m highly nonlinear fiber can improve the NPR effect in the laser cavity, which can increase the number of output channels. By adjusting the polarization state of the polarization controllers properly, stable multiwavelength operation at the 2 μm spectrum can be obtained at room temperature. It can achieve 15 output channels within a 10 dB bandwidth from 1990 to 2007.5 nm. The channel spacing of the multiwavelength Tm3+-doped silica fiber laser is 1.22 nm. Moreover, the performance of the laser is investigated for different pump powers and fibers.

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Arbitrarily switchable multi-wavelength Yb-doped fiber lasers with phase-shifted long-period fiber grating

Cited by 8 publications

References 14 publications

Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion

Noise-like pulse generation from a thulium-doped fiber laser using nonlinear polarization rotation with different net anomalous dispersion

Switchable Ytterbium Fiber Laser Based on a Symmetrical Long-Period Fiber Grating

A multiwavelength thulium-doped silica fiber laser incorporating a highly nonlinear fiber

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