Wavelength-tunable 10 GHz actively harmonic mode-locked fiber laser based on semiconductor optical amplifier

Mao, Yan; Tong, Xiaofeng; Wang, Zhiqiang; Zhan, Li; Pan, Heng; Liang, Chunjun

doi:10.1007/s00340-015-6263-1

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…This can be accomplished by employing an ultra-high-speed WEOS with a sub-nanosecond switching time, which is commercially available from the same EOSPACE company. Such technical upgrade will enable the bidirectional generation of much shorter (even subnanosecond) pulses, similarly to the previously demonstrated unidirectional pulse generation in an SOA-fiber ring laser with the high-order harmonic mode-locking driven by a fast electrooptic modulator [22].…”

Section: Switchable Bidirectional Pulse Generationmentioning

confidence: 66%

“…It is well-known that actively mode-locked lasers can be made to operate in harmonically mode-locked regimes by multiplying the modulation frequency (i.e. the frequency driving an intracavity modulator) [22]. To achieve similar regimes in the proposed laser configuration, one must trigger the cavity topology switching at a multiple of the fundamental repetition rate.…”

Section: Switchable Bidirectional Pulse Generationmentioning

confidence: 99%

See 1 more Smart Citation

Fiber laser cavity with dynamically transformable topology for switchable bidirectional pulse generation

Nyushkov,

Smirnov,

Ivanenko

et al. 2023

Laser Phys. Lett.

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We propose and study a novel type of fiber laser cavities which features dynamically transformable topology and enables pulse-to-pulse directional switching of the intracavity laser power flow. The key element of the proposed fiber cavity configuration is a fast 2 × 2 waveguide electrooptic switch (WEOS) which links a Sagnac-like (bidirectional) passive fiber loop with a unidirectional fiber loop incorporating an optical amplifier (OA) (rare-earth- or semiconductor-based). Electronic control of the WEOS port-to-port transmittance enables reversable gradual transformation of the laser cavity topology. This transformation results in directional switching of the laser radiation circulation in the Sagnac fiber loop. Proper dynamics of such transformation allows obtaining of complementary pulse trains from the counter-directional outputs in the Sagnac fiber loop. We validated this capability in a proof-of-concept transformable fiber cavity employing a semiconductor OA. The proposed cavity configuration enables switchable bidirectional pulse generation in various regimes including mode-locked ones.

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Section: Switchable Bidirectional Pulse Generationmentioning

confidence: 66%

Section: Switchable Bidirectional Pulse Generationmentioning

confidence: 99%

Fiber laser cavity with dynamically transformable topology for switchable bidirectional pulse generation

Nyushkov,

Smirnov,

Ivanenko

et al. 2023

Laser Phys. Lett.

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show abstract

“…In [17], HML was achieved by dissipative solitons production also in Er-doped fibre laser. Active HML was demonstrated in undoped fibre laser based on semiconductor optical amplifier [18] and the same operational mode was realized in Er-doped fibre laser [19]. In both papers, LiNbO 3 electrooptic modulator was used, and laser pulses repetition rate was changed by varying the modulator working frequency at fixed pump power.…”

Section: Introductionmentioning

confidence: 99%

Variable Repetition Rate Picosecond Master Oscillator for Photoelectron Gun

et al. 2022

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In this work, aiming at the master oscillator of the photoelectron gun with a variable repetition rate of electron bunches, a picosecond solid-state laser subject to delayed optoelectronic feedback and RF loss modulation is studied. Loss modulation is performed using an electro-optical modulator with zero bias at the second accelerator frequency subharmonic. Optoelectronic negative feedback uses an intracavity electro-optical modulator and a fast high-voltage photodiode mounted as close as possible to the modulator crystal. An analytical formula is obtained for the pulse duration, and estimates are given for Nd and Yb based media and L, S, C and X-band used in modern linear accelerators. Numerical simulation proves that the control is suitable for pulse-repetitive operation. The proposed approach solves the problem of laser pulse shortening and locking the master oscillator, and therefore, electron bunches in photoelectron guns, to the high-stable RF generator controlling accelerator functioning.

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“…In contrast, harmonic mode locking can overcome the limitation of the gain fiber length and output multigigahertz pulse train. In the previous work, harmonically mode-locked fiber lasers were demonstrated using a semiconductor saturable Bragg reflector, 8) the nonlinear polarization rotation, 9) an optically pumped semiconductor optical amplifier, 10) and a microfiber-based topological insulator saturable absorber, 11) respectively. Nonetheless, the degradation of the pulse characteristics severely increases with the harmonic order, greatly reducing both number and area of the applications.…”

mentioning

confidence: 99%

High-power self-similar amplification seeded by a 1 GHz harmonically mode-locked Yb-fiber laser

Li¹,

Liu²,

Wang³

et al. 2016

Appl. Phys. Express

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We demonstrate 1 GHz, 75 W, 65 fs pulse generation through chirped-pulse and self-similar amplification of a second-harmonic mode-locked Yb fiber oscillator. To confirm the experimental results of a chirped-pulse pre-amplifier, a theoretically calculative model is designed to simulate gain narrowing in the amplification. Specifically, the Kelly sidebands generated by a seed laser experience similar evolution under both conditions. The grism-based self-similar amplifier together with a high-efficiency grating compressor contribute to high-power ultrashort pulses whose spectra are efficiently broadened to a maximum 10 dB bandwidth of 56 nm with a center wavelength of 1032.2 nm owing to self-phase modulation in a gain fiber.

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Wavelength-tunable 10 GHz actively harmonic mode-locked fiber laser based on semiconductor optical amplifier

Cited by 7 publications

References 23 publications

Fiber laser cavity with dynamically transformable topology for switchable bidirectional pulse generation

Fiber laser cavity with dynamically transformable topology for switchable bidirectional pulse generation

Variable Repetition Rate Picosecond Master Oscillator for Photoelectron Gun

High-power self-similar amplification seeded by a 1 GHz harmonically mode-locked Yb-fiber laser

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