Self-sweeping ytterbium-doped fiber laser based on a fiber saturable absorber

Wen, Zengrun; Wang, Kaile; Lu, Baole; Chen, Haowei; Bai, Jintao

doi:10.35848/1882-0786/abd37d

Cited by 17 publications

(18 citation statements)

References 31 publications

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“…In 2021, our group [28] observed a new sequence of self-pulse signals, similar to spike pulses, in a single-frequency ytterbiumdoped self-sweeping fiber laser based on a fiber saturable absorber, as shown in Figure 12A. The laser hops over modes of the…”

Section: Novel Pulse Sequencesmentioning

confidence: 96%

“…In 2021, our group [28] introduced a 1.8 m-long section of ytterbium-doped fiber as a fiber saturable absorber into the laser resonator through a circulator (CIR), and the experimental setup is shown in Figure 5. The ytterbium-doped fiber absorbs light in two directions to form a standing wave, forming a positiondependent periodic refractive index change, i.e., a grating, which in turn produces a normal self-sweeping effect.…”

Section: Unidirectional Fiber Ring Resonatormentioning

confidence: 99%

“…FIGURE 5 | Experimental setup of Yb-doped self-sweeping fiber laser with unidirectional ring cavity based on a fiber saturable absorber[28].…”

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confidence: 99%

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Recent Progress and Development Trend of Self-Sweeping Fiber Laser

et al. 2021

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Since 2011, when Kir’yanov et al. first reported a new wavelength self-sweeping ytterbium-doped fiber laser that does not rely on any tuning element but only on the dynamic induced grating generated in the gain fiber by the standing wave resonator structure, the self-sweeping effect based on fiber waveguides has been extensively studied, leading to great progress in fundamental physics and other applications of self-sweeping fiber lasers. Different doped fiber lasers have not only achieved the self-sweeping effect, but also observed new phenomena such as anomalous self-sweeping and continuous pulses. Due to their remarkable spectral and pulsed characteristics, self-sweeping fiber lasers have been widely used in spectral detection, fiber sensing and short pulse synthesis. In this paper, we will introduce the classification of different doped self-sweeping fiber lasers, summarize their different implementations, and introduce their self-sweeping laws, pulse characteristics, recent progress of applications and future development prospects.

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Section: Novel Pulse Sequencesmentioning

confidence: 96%

Section: Unidirectional Fiber Ring Resonatormentioning

confidence: 99%

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Recent Progress and Development Trend of Self-Sweeping Fiber Laser

et al. 2021

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“…This fact complicates spectral measurements schemes used for practical application of the self-sweeping lasers (see, for example [17],). A single-frequency self-sweeping operation with longer duration τ p ∼ 1 ms and absence of zero intensity intervals (T = τ p ) has been recently demonstrated in [18][19][20]. The intensity dynamics correspond in this case to the continuous-wave (CW) radiation with short intensity bursts in the transition regions between generation of neighboring pulses (mode packets) [18][19][20].…”

Section: Introductionmentioning

confidence: 95%

Time-resolved mode analysis in Er-doped self-sweeping ring fiber laser

Poddubrovskii¹,

Lobach²,

Podivilov³

et al. 2022

Laser Phys. Lett.

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We present here a detailed study of the mode composition of an Er-doped ring self-sweeping fiber laser. Time-resolved heterodyne measurements prove that the radiation consists of slightly overlapping rectangular mode packets, each of which corresponds to generation of individual longitudinal modes. Optical frequency of each following packet sequentially increases by two free spectral ranges of the laser cavity. The presence of parametric processes during sequential growth of the neighboring mode packets is experimentally demonstrated for the first time in a self-sweeping laser. Instantaneous linewidth of the laser radiation does not exceed 4 kHz during every step of single longitudinal mode generation, which is also accompanied by a small change of the optical frequency (chirp) of ∼40 kHz associated with an integral change of the laser cavity refractive index. The results are useful for calculations and modeling of laser systems based on dynamic gratings.

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“…However, the sigma-cavity has not been entirely successful in preventing the formation of gain DPG, which arises from the standing wave resulting from the interference of forward light and faint reflective feedback from the linear part [36]. As a result, wavelength self-sweeping (WLSS) operations have been observed instead of stable single frequency emission in such configurations [37]. This raises the question of determining the exact boundaries between stable lasing and WLSS operation in different fiber lasers with sigma-cavity.…”

Section: Introductionmentioning

confidence: 99%

Observation of Q-switched and continuous wave regimes with mode-hopping in Er-doped fiber lasers incorporating a dynamic population grating

Wen¹,

Fan²,

Wang³

et al. 2023

Preprint

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Dynamic population gratings (DPGs) in rare-earth doped fibers are prevalent devices in fiber lasers for the production of single-longitudinal-mode emission, Q-switched pulses, and wavelength self-sweeping regimes. This study presents a transition from Q-switched state to continuous wave (CW) state, accompanying irregular mode-hopping, in an erbium-doped fiber laser with a heavily-doped DPG centered at 1549.95 nm. Our results demonstrate that the transition between these two states can be achieved by adjusting the pump power. The repetition frequency of the Q-switched pulse increases monotonically with the increasing pump power, while the pulse duration initially narrows and then expands because the reduced peak intensity weakens the nonlinear effect. Additionally, modulation peaks are evident on both the Q-switched pulse train and the CW background, which are induced by the irregular mode-hopping caused by the DPG. Furthermore, we observe that the central wavelength fluctuates within a range of 0.05 nm. These results provide valuable insight into the DPG effect in heavily-doped fibers.

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Self-sweeping ytterbium-doped fiber laser based on a fiber saturable absorber

Cited by 17 publications

References 31 publications

Recent Progress and Development Trend of Self-Sweeping Fiber Laser

Recent Progress and Development Trend of Self-Sweeping Fiber Laser

Time-resolved mode analysis in Er-doped self-sweeping ring fiber laser

Observation of Q-switched and continuous wave regimes with mode-hopping in Er-doped fiber lasers incorporating a dynamic population grating

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