A widely tunable single-longitudinal-mode ytterbium-doped fiber laser based on fiber Lyot filter

Bai, Hangyu; Yin, Taoce; Jiang, Xiaogang; Gao, Shiming

doi:10.1088/1555-6611/aac8be

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Figure 1(a) shows the filter in this experiment. In the experiment, the Sagnac-like loop is selected to replace the PMF in the traditional Lyot filter [21] to study the tunability performance under the action of PCs and PDI. In the experiment, a 2 m long PMF (PM1017-c 1550 FC/APC) and a 50:50 OC are selected to form a loop structure.…”

Section: Principle and Characteristics Of The Sagnac-like Loop Embedd...mentioning

confidence: 99%

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

Zhou¹,

Tong²,

Zhang³

et al. 2023

Laser Phys.

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In this paper, a new type of widely tunable and switchable multi-wavelength erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter is proposed. The nonlinear polarization rotation effect is obtained by adjusting two polarization controllers (PCs). The polarization-dependent isolator and the Sagnac-like loop are used as the basic structure to realize the wide tuning and wavelength switching in C-band. Compared with the traditional Lyot filter, the Sagnac-like loop is used to replace the segment of polarization-maintaining fiber, and a more uniform comb spectrum can be obtained by this filter. The tunable and switchable wavelengths can be achieved by adjusting the PCs based on the nonlinear effect of the loop. The laser can emit single-, dual-, triple-, quad- and quintuple-wavelengths. The optical signal-to-noise ratios all exceed 43 dB. It can also be adjusted to partial wavelength intervals for quad-wavelength and quintuple-wavelength. The tuning range can reach the full range of the C-band, and the laser efficiency can reach the practical application standard. It can be applied to some precision instruments and equipment.

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Section: Principle and Characteristics Of The Sagnac-like Loop Embedd...mentioning

confidence: 99%

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

Zhou¹,

Tong²,

Zhang³

et al. 2023

Laser Phys.

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“…As detailed above, multi-wavelength EDFLs are typically realized by using a twin-core fiber [18], Sagnac loop [19], MZI, PCF, and complex structures. When only a single Sagnac loop was used, side modes were clearly observed and the lasing wavelength tuning scope was not wide enough.…”

Section: Introductionmentioning

confidence: 99%

Multi-wavelength switchable erbium-doped fiber laser based on a hybrid filter incorporating a bi-tapered Mach–Zehnder interferometer and Sagnac loop

Yuan

Lou

et al. 2019

Phys. Scr.

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A multi-wavelength switchable C-band erbium-doped fiber laser based on a hybrid comb filter composed of a Sagnac loop and Mach–Zehnder interferometer (MZI) is designed and experimentally demonstrated. In the designed ring cavity fiber laser, the MZI is composed of bi-tapered single-mode fiber fabricated by etching with hydrofluoric acid. In the experiment, the wavelength intervals in the comb spectra of the Sagnac loop and MZI are 3.4 and 18.8 nm, respectively, and by combining the Sagnac loop and MZI, measurements of the hybrid comb spectrum are obtained. When the pump power is 91 mW, lasing occurs at 1529.2 nm. Adjustment of the variable attenuator (VA) can provide 1541.9 and 1558.6 nm single-wavelength switchable lasers, for which the maximum peak power difference is less than 3.59 dB, the signal-to-noise ratio (SNR) exceeds 19.25 dB, and the peak power fluctuation is less than 0.34 dB over a 30 min scan time at 26 °C. For dual-wavelength switchable laser emission, four different sets of wavelengths can be realized, and the SNR exceeds 15.57 dB with power fluctuations of less than 1.6 dB, under the same monitoring conditions. By further adjusting the VA, stable and tunable triple-wavelength lasing is also realizable; under these conditions, the SNR exceeds 15.02 dB and the power fluctuation is less than 0.91 dB. Furthermore, four- and five-wavelength lasing can also be achieved by adjusting the VA again, with SNRs exceeding 19.05 and 14.98 dB, respectively.

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“…Usually, the T-SFFLs contain two mainly functional portions: wavelength-tunability device and single-longitudinal-mode (SLM) lasing device. The former is the most essential element of a tunable fiber laser, such as fiber Bragg grating (FBG), 9,10) fiber Fabry-Pérot tunable filter (FFP-TF), 11,12) Lyot filter, 13,14) Sagnac loop, 15,16) and single-mode-multimode-single-mode fiber structure. 17,18) However, due to a small longitudinal mode spacing of the ring-cavity and large bandwidth of the tunable devices, other necessary optical components must be combined and employed in fiber laser for ensuring a stable SLM output.…”

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confidence: 99%

Widely tunable sub-kHz linewidth Tm³⁺-doped single-frequency fiber laser

Jiang

Yang

Zhao

et al. 2022

Appl. Phys. Express

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Based on a fiber Fabry-Pérot tunable filter (FFP-TF) and a 3.0-m-long unpumped gain fiber for forming dynamic grating, a in-band pumped tunable Tm3+-doped single-frequency fiber laser (T-TSFFL) covering a wavelength tuning range from 1857.01 to 2020.17 nm and a tuning interval of < 0.43 nm is demonstrated experimentally. Additionally, the laser linewidths of < 500 Hz and the relative intensity noises of ˂ -145 dB/Hz at frequencies over 1 MHz are obtained. To date, it is the broadest wavelength tuning range that has been reported in the 2 μm region, which is highly competitive in atmospheric detection.

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A widely tunable single-longitudinal-mode ytterbium-doped fiber laser based on fiber Lyot filter

Cited by 7 publications

References 13 publications

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

Multi-wavelength switchable erbium-doped fiber laser based on a hybrid filter incorporating a bi-tapered Mach–Zehnder interferometer and Sagnac loop

Widely tunable sub-kHz linewidth Tm³⁺-doped single-frequency fiber laser

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A widely tunable single-longitudinal-mode ytterbium-doped fiber laser based on fiber Lyot filter

Cited by 7 publications

References 13 publications

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

A C-band widely tunable and switchable erbium-doped fiber laser based on a Sagnac-like loop embedded in Lyot filter

Multi-wavelength switchable erbium-doped fiber laser based on a hybrid filter incorporating a bi-tapered Mach–Zehnder interferometer and Sagnac loop

Widely tunable sub-kHz linewidth Tm3+-doped single-frequency fiber laser

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Widely tunable sub-kHz linewidth Tm³⁺-doped single-frequency fiber laser