Controlling group and phase velocities in bidirectional mode-locked fiber lasers

Afkhamiardakani, Hanieh; Diels, Jean‐Claude

doi:10.1364/ol.44.002903

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…Summarily, bidirectional ring Er-doped fibre laser, mode-locked by carbon nanotube saturable absorber and nonlinear polarisation evolution, in a steady-state generates near transform-limited 790 and 570-fs soliton pulses at 1555 nm central wavelength and 14.78 MHz repetition rate in both directions 33 . The phenomenon of identical central wavelengths of counter-propagating solitons refers to the colliding modelocking 34,35 . The output power was 1 mW in a clockwise direction, and 0.4 mW in a counter-clockwise direction.…”

Section: Resultsmentioning

confidence: 99%

Pulse-onset dynamics in a bidirectional mode-locked fibre laser via instabilities

2020

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Real-time observation of the emergence of coherent structures from noise via instabilities is of particular interest across disciplines ranging from biology to astrophysics. In the context of photonics, ultrafast fibre lasers provide an ideal test-bed for experimental observation of dynamical instabilities and generation of coherent structures of ultrashort pulses. Here we present experimentally obtained switch-on dynamics of counter-propagating ultrashort pulses in a bidirectional mode-locked fibre laser with delayed pulse formation via Q-switched and modulation instabilities, pronounced central wavelength drift, with the multiple-pulse formation. We define a localisation parameter using the round-trip resolved autocorrelation function to quantify the extent of the pulse formation, indicating an energy interchange between coherent features and background radiation. Furthermore, we report the formation of synchronised and unsynchronised dispersion waves. Our results reveal the complexity of the establishment of coherent features and their interaction with background radiation, contributing further towards the understanding of nonlinear systems in general.

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Section: Resultsmentioning

confidence: 99%

Pulse-onset dynamics in a bidirectional mode-locked fibre laser via instabilities

2020

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“…However, it has been demonstrated that this traditional definition of group velocity does not apply to media with saturable gain/absorption [ 25 ]. In a fiber laser, energy exchanges between the leading and trailing edge of the envelope determine its velocity [ 26 ]. The situation is similar in the laser with intracavity etalon: at each round-trip, a small portion of energy of each pulse of a bunch is transferred to the next one.…”

Section: Auto-synchronization Of Parent and Nested Cavitymentioning

confidence: 99%

Control of Frequency Combs with Passive Resonators

Hendrie

Hsu

Diels

2023

Sensors

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Tailored optical frequency combs are generated by nesting passive etalons within mode-locked oscillators. In this work, the oscillator generates a comb of 6.8 GHz with 106 MHz side-bands. This tailored comb results from the self-synchronized locking of two cavities with precision optical frequency tuning. In this manuscript, it is demonstrated that these combs can be precisely predicted utilizing a temporal ABCD matrix method and precise comb frequency tuning by scanning over the D1 transition line of 87Rb and observing the fluorescence.

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“…This nonlinearity can be exploited for making pulsed lasers and sensors of very small energy consumption. It would also avoid the nonlinearities that affect the group and phase velocities in fiber based sources of frequency combs [4]. The grey regions in Figs.…”

Section: Measurementsmentioning

confidence: 99%

“…By 1953 image transmission through the first fiberscope was demonstrated [1]. Today, optical fiber has become an integral part of many fields including telecommunication [2], medical [3], and metrology [4].…”

Section: Introductionmentioning

confidence: 99%

Low-power (mW) nonlinearities of polarization maintaining fibers

et al. 2019

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Polarization maintaining (PM) fibers are meant to maintain linear polarization along a preferred axis. A PM fiber can be seen as the fiber version of a very high order waveplate, designed with different refractive indices along two orthogonal axes. It is shown that monitoring the polarization of initially circularly polarized light sent through a PM fiber, leads not only to new sensing methods, but also to power control, saturable absorption, and optical path stabilization. Even at peak power levels not exceeding a few mW, nonlinear transmission is detected, with time constants in the microsecond range.

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Controlling group and phase velocities in bidirectional mode-locked fiber lasers

Cited by 11 publications

References 35 publications

Pulse-onset dynamics in a bidirectional mode-locked fibre laser via instabilities

Pulse-onset dynamics in a bidirectional mode-locked fibre laser via instabilities

Control of Frequency Combs with Passive Resonators

Low-power (mW) nonlinearities of polarization maintaining fibers

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