All-fiber spatiotemporal mode-locking lasers with large modal dispersion

Zhang, Huaiwei; Zhang, Yunhong; Peng, Jun; Su, Xinyang; Xu, Dongjian; Chen, Junhao; Sun, Tianran; Zheng, Kai; Yao, Jianquan; Zheng, Yi; Xiao, Xiaosheng

doi:10.1364/prj.444750

Cited by 29 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spatial filter can compensate (at least part of) the modal dispersion, [ 5 ] since the spatial filter will “restrict the modal content of the pulses” and “spatially homogenize the field across time.” [ 6,13 ] The importance of spatial filtering for spatiotemporal mode‐locking implementation is consistent with previous work. [ 5,25,33,34 ] From the perspective of pulse shaping, spectrum modulation and modal walk‐off balance, the numerical results show that it is mainly the collaboration of spatial filters and SA promotes the generation of spatiotemporal mode‐locking. To summarize, nonlinear polarization rotation is a crucial factor in promoting pulse (longitude modes) initiation from noise and stabilization pulse trains.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we employed commercially available step-index (STIN) MMFs with a large modal dispersion and validated their feasibility in achieving spatiotemporal mode-locking. [24,25] However, the average output power needs to be further improved. Furthermore, due to linear interference between multiple excited guided modes, the output beam profiles of STML oscillators usually exhibit spatial speckle patterns.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

Zhang

Peng

et al. 2023

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

The developed spatiotemporal mode‐locked (STML) laser has emerged as an effective platform for investigating high‐dimensional nonlinear spatiotemporal dynamics. Additionally, it offers a novel avenue for the design of fiber oscillators capable of operating at high power levels. At present, the focus of STML laser research primarily revolves around this aspect. However, considering practical applications, there is a strong desire to conceive a simple all‐fiber STML oscillator with both high beam quality and high power. In this study, an all‐fiber, high‐power STML oscillator based on multimode fibers is constructed and investigated. By manipulating the pump power and the polarization state, the laser could operate in a dissipative soliton or noise‐like pulse regime, both with average output powers of two operation states reaching the Watt level. Simultaneously, high‐quality output beam profiles are observed in both operation states. To the best of knowledge, this is the first demonstration of high‐power spatiotemporal mode‐locking with high beam quality. The study holds great benefits for advancing the investigations of compact all‐fiber STML lasers which deliver high‐power outputs with superior beam quality and ultimately propels the application of STML lasers. Furthermore, this study contributes to the understanding of the behavior of STML lasers with high power.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

Zhang

Peng

et al. 2023

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

show abstract

“…Meanwhile, the effect of (virtual) spatial filtering on the modal-dispersion compensation is also shown in a STML multimode Mamyshev oscillator and an all-fiber cavity with STML recently. [30,31] Finally, the beam profiles of different transverse modes are exhibited in Figure 2d.…”

Section: Experimental Setup and Numerical Simulationsmentioning

confidence: 99%

Visible‐Wavelength Spatiotemporal Mode‐Locked Fiber Laser Delivering 9 ps, 4 nJ Pulses at 635 nm

Ruan

Xiao

Zou

et al. 2022

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

Spatiotemporal mode‐locking (STML) in fiber lasers are of interest in applications such as optical communications, nonlinear imaging, and precision machining. To date, STML fiber lasers in the near‐infrared region have been well demonstrated, yet operation at visible wavelengths is still challenging. Here, a STML picosecond fiber laser at 635 nm with the implementation of Pr3+$^{3+}$/Yb3+$^{3+}$ co‐doped few‐mode fiber and nonlinear polarization rotation technology is reported. By solving the modified generalized multimode nonlinear Schrödinger equation, the 635 nm STML formation is theoretically predicted and analyzed. The stable 635 nm STML with a 9 ps pulse duration, which is two orders of magnitude narrower than previously reported, is realized experimentally. Moreover, spatiotemporal profiles are illustrated by investigating the locking of transverse and longitudinal modes simultaneously. By further establishing visible ultrafast fiber amplifier, the 635 nm average power is boosted up to 440 mW, corresponding to a maximum pulse energy and peak power of 4 nJ and 280 W, respectively. The experimental results are in good agreement with the numerical simulations. This work helps to understand nonlinear dynamics in STML fiber laser and directly generate large‐energy ultrashort pulses in visible region.

show abstract

“…The operated wavelength of STML MMF lasers ranged from visible light to 1 µm, 1.5 µm and 2 µm [15][16][17][18][19]. STML MMF lasers with large modal dispersion were also achieved with hybrid or all-fiber structures [20,21]. STML MMF laser with single mode output were obtained by means of optimizing the spatiotemporal evolution in MMF lasers [16] or utilizing spatial beam self-cleaning effect in MMFs [22].…”

Section: Introductionmentioning

confidence: 99%

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

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.

show abstract

All-fiber spatiotemporal mode-locking lasers with large modal dispersion

Cited by 29 publications

References 37 publications

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

Visible‐Wavelength Spatiotemporal Mode‐Locked Fiber Laser Delivering 9 ps, 4 nJ Pulses at 635 nm

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

Contact Info

Product

Resources

About