Multimode oscillation Q-switched mode-locking fiber laser based on gain equalized few-mode Er-doped fiber

Jia, Wei; Zhang, Peng; He, Zhenxing; He, Shuang; Gong, Xiyu; Fan, Yunlong; Tong, Shoufeng

doi:10.1117/1.oe.60.5.056108

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…The gain medium was a segment of FM-EDF that supports six modes, the FM-EDF acted both as the gain medium and a saturable absorber, other fibers in the cavity were passive few mode fiber (FMF) and GRIN-MMF. Compared to the former work (Multimode QML threshold 1.14 W in [24] and 2.35 W in [26]. ), to the best of our knowledge, the proposed multimode QML laser achieved the lowest threshold (70 mW).…”

Section: Introductioncontrasting

confidence: 52%

“…LP 01 , LP 11a , LP 11b , LP 21a , LP 21b , and LP 02 ). The FM-EDF was designed with two-ring erbium-doped profile to equalize the modal gain and it was heavily doped [26,29]. A single mode 980 nm laser source (Max 1.2 W) was used to pump the FM-EDF through a few-mode 980/1550 nm wavelength division multiplexer (WDM).…”

Section: Methodsmentioning

confidence: 99%

“…Zhang et al reported the transition from STML pulses to QS pulses [21]. We demonstrated a multimode QML fiber laser based on a long, gainequalized few-mode Er-doped fiber with a section of spatial optical path in the laser cavity [26]. The nonlinear dynamics in MMFs are extremely complex and remain to be explored [27,28].…”

Section: Introductionmentioning

confidence: 96%

“…The nonlinear dynamics in MMFs are extremely complex and remain to be explored [27,28]. At present, multimode QML pulses reported are obtained with high pump thresholds (watt level) [24,26]. High pump thresholds lead to an increase of experimental instruments cost and the risk of fiber ends damage.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

All-fiber low threshold tunable multimode Q-switched mode locked fiber laser using a few mode Er-doped fiber

Fan¹,

Zhang²,

Ning³

et al. 2023

Laser Phys.

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We report an all-fiber low threshold (70 mW) multimode Q-switched mode-locked (QML) fiber laser at 1.5 μ m. Nonlinear polarization rotation and a few mode Er-doped fiber (FM-EDF) were both adopted to achieve a low threshold QML operation initially, and the later experimental results showed and verified that the FM-EDF was the key factor of the QML pulses generation. A multimode QML state at 70 mW pump power was obtained with an 18 μs Q-switched pulse width and a 7.41 kHz repetition rate. The repetition rate and pulse width of the mode-locked pulses within the Q-switched envelope were 16.9 MHz and ∼910 ps respectively. The multimode QML fiber laser can be turned from 1561.8 nm to 1575.1 nm owing to the multimode interference and the fiber birefringence filtering effect. The QML pulses with dual-wavelength and three-wavelength were also observed by manipulating the polarization controllers and increasing the pump power. The experimental results showed that multimode QML pulses can be achieved with a short FM-EDF at a lower pump power in an all-fiber multimode cavity. The generated low threshold and tunable QML multimode fiber laser has potential application in measuring and mode-division multiplexed system.

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Section: Introductioncontrasting

confidence: 52%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

All-fiber low threshold tunable multimode Q-switched mode locked fiber laser using a few mode Er-doped fiber

Fan¹,

Zhang²,

Ning³

et al. 2023

Laser Phys.

View full text Add to dashboard Cite

show abstract

Cylindrical vector beam generation from a hybrid multimode Q-switched mode-locked fiber laser

Wan,

Zhou,

Liu

et al. 2024

Infrared Physics & Technology

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Recent advances and future outlook in mode-locked lasers with multimode fibers

Fu,

Shang,

Liu

et al. 2023

Applied Physics Reviews

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Multimode fibers (MMFs) have attracted interest because of their larger mode area and additional spatial degrees of freedom compared with single-mode fibers. Recently, MMFs have been introduced into mode-locked lasers for new cavity structures with better laser performance. Among these lasers, there are two remarkable cases in which MMFs are the key components for mode-locking: One is using a short segment of the MMF as a saturable absorber (SA), which has the advantages of high damage threshold, wide operating bandwidth, and low cost. The other is the construction of multimode cavities with MMFs. Spatiotemporal mode-locking (STML), a general form of mode-locking, can be achieved in such cavities. Herein, we review these two types of mode-locked lasers with MMFs. The principles of MMF-based SA and STML are described based on the common theory of multimode nonlinear fiber optics. Subsequently, we present a detailed overview of the recent progress regarding these lasers, including lasers mode-locked by MMF-based SAs at the 1-, 1.5-, and 2-μm bands, as well as spatiotemporal mode-locked MMF lasers. A perspective for the development of mode-locked lasers with MMFs is also provided.

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Multimode oscillation Q-switched mode-locking fiber laser based on gain equalized few-mode Er-doped fiber

Cited by 5 publications

References 28 publications

All-fiber low threshold tunable multimode Q-switched mode locked fiber laser using a few mode Er-doped fiber

All-fiber low threshold tunable multimode Q-switched mode locked fiber laser using a few mode Er-doped fiber

Cylindrical vector beam generation from a hybrid multimode Q-switched mode-locked fiber laser

Recent advances and future outlook in mode-locked lasers with multimode fibers

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