Low mode-locking threshold and sub-90 fs Er-doped Mamyshev oscillator

Zheng, Jiancheng; Yang, Song; Zhu, Zhiwei; Lau, K. Y.; Li, Li

doi:10.1016/j.optcom.2021.127711

Cited by 14 publications

(6 citation statements)

References 20 publications

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“…There are two injection methods. The first method entails coupling the seed source with the MO via a coupler, as adopted for all-fiber MO [106,122,123,126] or almost all-fiber MO (where only the filter comprises a free-space optical filter and collimator); [36,55,112] the second method involves inserting the external seed source into the cavity via the grating. [34,58,77,107,108,125,126] Thus far, many researchers have considered that the bandwidth and peak power of the pulses from the seed source are critical factors in determining whether the pulses can span the passband of filters.…”

Section: Starting With External Seed Sourcementioning

confidence: 99%

Generation of High‐Peak‐Power Femtosecond Pulses in Mamyshev Oscillators: Recent Advances and Future Challenges

Gao

et al. 2023

Laser & Photonics Reviews

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Mamyshev oscillators (MOs) have attracted significant attention given their potential in yielding ultrafast lasers with high peak power. Based on step‐like saturable absorbers and self‐similar evolution in the gain fiber, MO technology features an advanced system capable of generating ultrastable femtosecond pulses with ultrahigh peak power. In this review, the principle of MO is presented in terms of their transmission function and tolerance to nonlinear phase shift and recent progress is reported in the advanced output performance of MO, manifested through high peak power, few‐cycles, high repetition rate, and supercontinuum generation. MO with various operation wavelengths (1, 1.5, and 2 μm) are examined, and MO starting methods are fully discussed, followed by a detailed account of diverse potential applications in areas such as biomedical imaging and material processing. Based on current progress, the prospective challenges and future directions of MO are highlighted and discussed.

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Section: Starting With External Seed Sourcementioning

confidence: 99%

Generation of High‐Peak‐Power Femtosecond Pulses in Mamyshev Oscillators: Recent Advances and Future Challenges

Gao

et al. 2023

Laser & Photonics Reviews

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“…The modelocked operation was easily initiated when the power of the two pumps exceeded 33.9 and 28.8 mW, respectively. 53 55 In 2021, the group applied ultra-high numerical aperture fibers with normal dispersion to achieve up-chirped pulses in an anomalous dispersive Tm-doped gain fiber. With that design, modelocked pulses with energies of 6.4 nJ were obtained at a repetition rate of 16 MHz.…”

Section: Mamyshev Oscillator Based On Seed-source Starting Modementioning

confidence: 99%

“…were demonstrated an all-fiber Mamyshev oscillator with 83 fs short pulse-duration that the sub-90 fs pulse output was first observed directly from the Mamyshev oscillator output coupler without extra compression. The mode-locked operation was easily initiated when the power of the two pumps exceeded 33.9 and 28.8 mW, respectively 53 . In 2022, Zheng et al.…”

Section: Mamyshev Oscillator Based On Seed-source Starting Modementioning

confidence: 99%

Recent advance of high-energy ultrafast mode-locked oscillators based on Mamyshev mechanism with different starting modes

Wang

Bai

et al. 2022

Opt. Eng.

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The nonlinear effect of fiber limits the further increase in pulse energy, and Mamyshev oscillator shows outstanding advantages in managing nonlinearity in waveguide medium, which is now associated with high peak power and high pulse energy. The potential applications of these laser sources based on Mamyshev mechanism have facilitated aggressive research and innovative ideas by researchers around the world. Here, we focus on the modelocked principle and starting dynamics of Mamyshev oscillator. The review of Mamyshev technology is summarized from two starting modes of seed source injection and self-starting. Initial research and significant progress in this field, plus new insights and challenges of Mamyshev oscillator for ultrafast fiber laser technology are analyzed.

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“…Only laser pulses with sufficiently high peak power can generate enough spectrum broadening and pass through the offset filters. Mamyshev oscillators have been experimentally demonstrated to have great potential in generating high-energy ultra-short pulses [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Using fibre Bragg gratings as spectral filters, Boulange et al [20], Želudevic ˇius et al [21], and Bednyakova et al [22] experimentally and numerically exploited the tunability of FBGs to achieve high-energy pulses. Besides, Zheng et al achieved sub-90 fs pulses from an Erbium-doped Mamyshev oscillator without external grating compression, and they show the possibility to obtain low threshold in this laser [23]. However, because of gain saturation, reabsorption, nonlinearity and their compound effects in the gain fibre, the influences of those cavity parameters on the pulse evolution of the Mamyshev oscillators remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the self-starting Mamyshev oscillator with low threshold

Guo¹,

Lu²,

He³

et al. 2022

Laser Phys. Lett.

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We have demonstrated a mode-locked Mamyshev oscillator based on a single-mode-fibre configuration with low threshold. The influences of spectral filters and the pump power on the output laser characteristics have been investigated. In the case with spectral-filter central wavelength far away from the peak of gain spectrum, the laser pulses have deviated slightly from similariton evolution with gain-shaping under high pump power. Moreover, self-starting mode-locking operation has been realized when the pump power was only 520 mW, which might benefit from the appropriate polarization conditions and small spectral filter separation. The laser can generate 1.89 nJ ultra-short pulses with 20 dB spectral width of 54.6 nm. The pulse duration can be compressed externally to 64.69 fs with the peak power of 21.3 kW.

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Low mode-locking threshold and sub-90 fs Er-doped Mamyshev oscillator

Cited by 14 publications

References 20 publications

Generation of High‐Peak‐Power Femtosecond Pulses in Mamyshev Oscillators: Recent Advances and Future Challenges

Generation of High‐Peak‐Power Femtosecond Pulses in Mamyshev Oscillators: Recent Advances and Future Challenges

Recent advance of high-energy ultrafast mode-locked oscillators based on Mamyshev mechanism with different starting modes

Investigation on the self-starting Mamyshev oscillator with low threshold

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