Direct control of mode-locking states of a fiber laser

Iegorov, Roman; Teamir, Tesfay; Makey, Ghaith; Ilday, F. Ö.

doi:10.1364/optica.3.001312

Cited by 31 publications

(21 citation statements)

References 28 publications

(40 reference statements)

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“…4(a)-4(c), dependent on the intracavity polarization state, as expected for BS operation [18]. Further tuning the PC, the CW peaks (an indication of laser stability [58]) shown in Figs. 4(a) and 4(b), are eliminated.…”

Section: Resultssupporting

confidence: 57%

Bound states of solitons in a harmonic graphene-mode-locked fiber laser

Fu¹,

Li²,

Cao³

et al. 2019

Photon. Res.

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We report bound states of solitons from a harmonic mode-locked fiber laser based on a solution-processed graphene saturable absorber. Stable soliton pairs, 26.2 ps apart, are generated with 720 fs duration. By simply increasing the pump power, the laser can also generate harmonic mode-locking with harmonics up to the 26th order (409.6 MHz repetition rate). This is a simple, low-cost, all-fiber, versatile multifunction ultrafast laser that could be used for many applications.

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Section: Resultssupporting

confidence: 57%

Bound states of solitons in a harmonic graphene-mode-locked fiber laser

Fu¹,

Li²,

Cao³

et al. 2019

Photon. Res.

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show abstract

“…Both in experiments and simulations, an efficient means of mining for useful phenomena will be the use of heuristic search, or machine learning, techniques. These have already yielded interesting results in the comparatively simple world of the singlemode fiber oscillators [237][238][239][240][241] and in passive or amplifier multimode fiber propagation [232,242], and should be even more useful in the voluminous parameter space of multimode fiber lasers. To some extent, these techniques could be viewed as higher-dimensional versions of the work that has already been done on polarization (i.e., using waveplates to control NPE) and spectral/dispersion (using SLM-based pulse shapers) control.…”

Section: Important Questionsmentioning

confidence: 99%

Several new directions for ultrafast fiber lasers [Invited]

et al. 2018

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Ultrafast fiber lasers have the potential to make applications of ultrashort pulses widespread - techniques not only for scientists, but also for doctors, manufacturing engineers, and more. Today, this potential is only realized in refractive surgery and some femtosecond micromachining. The existing market for ultrafast lasers remains dominated by solid-state lasers, primarily Ti:sapphire, due to their superior performance. Recent advances show routes to ultrafast fiber sources that provide performance and capabilities equal to, and in some cases beyond, those of Ti:sapphire, in compact, versatile, low-cost devices. In this paper, we discuss the prospects for future ultrafast fiber lasers built on new kinds of pulse generation that capitalize on nonlinear dynamics. We focus primarily on three promising directions: mode-locked oscillators that use nonlinearity to enhance performance; systems that use nonlinear pulse propagation to achieve ultrashort pulses without a mode-locked oscillator; and multimode fiber lasers that exploit nonlinearities in space and time to obtain unparalleled control over an electric field.

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“…Specifically, researchers have implemented algorithmic and machine learning approaches to resonator parameter control, which, in concert with a suitable figure of merit, can help optimize a resonator for a certain pulse quality such as a minimum pulse width or a high peak power [19][20][21][22][23][24][25][26][27].…”

mentioning

confidence: 99%

Iteratively seeded mode-locking

et al. 2017

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Ultrashort pulsed mode-locked lasers enable research at new time-scales and revolutionary technologies from bioimaging to materials processing. In general, the performance of these lasers is determined by the degree to which the pulses of a particular resonator can be scaled in energy and pulse duration before destabilizing. To date, milestones have come from the application of more tolerant pulse solutions, drawing on nonlinear concepts like soliton formation and self-similarity. Despite these advances, lasers have not reached the predicted performance limits anticipated by these new solutions. In this letter, towards resolving this discrepancy, we demonstrate that the route by which the laser arrives at the solution presents a limit to performance which, moreover, is reached before the solution itself becomes unstable. In contrast to known self-starting limitations stemming from suboptimal saturable absorption, we show that this limit persists even with an ideal saturable absorber. Furthermore, we demonstrate that this limit can be completely surmounted with an iteratively seeded technique for mode-locking. Iteratively seeded mode-locking is numerically explored and compared to traditional static seeding, initially achieving a five-fold increase in energy. This approach is broadly applicable to mode-locked lasers and can be readily implemented into existing experimental architectures.Mode-locked laser systems generating ultrashort pulses with exceptional performance qualities (e.g. high-energy, short temporal duration, high peak powers) are attractive for countermeasure applications, nonlinear imaging, materials characterization and processing, and fundamental studies involving frequency comb metrology and the understanding of ultrafast dynamics [1].Achieving exceptional performance qualities presents a significant challenge because the nonlinear dynamics which underlie pulse formation in a laser resonator are complex. Major advances for ultrashort-pulsed laser development have come through new understandings of the steady-state behavior of pulse evolutions. This is particularly evident in fiber laser systems with the development of stretched-pulse [2], passive self similar [3,4], amplifier similariton [5][6][7], and dissipative soliton evolutions [8][9][10][11][12][13][14][15][16][17][18], demonstrating that pulse qualities can be altered or optimized through careful engineering of resonator characteristics.Recent developments in algorithmic approaches to mode-locking have helped to further propel the field by optimizing the multi-parameter design space of these resonators in a way that is difficult or impossible through manual design. Specifically, researchers have implemented algorithmic and machine learning approaches to resonator parameter control, which, in concert with a suitable figure of merit, can help optimize a resonator for a certain pulse quality such as a minimum pulse width or a high peak power [19][20][21][22][23][24][25][26][27].Despite these major advances, evidence suggests that experiments...

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Direct control of mode-locking states of a fiber laser

Cited by 31 publications

References 28 publications

Bound states of solitons in a harmonic graphene-mode-locked fiber laser

Bound states of solitons in a harmonic graphene-mode-locked fiber laser

Several new directions for ultrafast fiber lasers [Invited]

Iteratively seeded mode-locking

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