Polarization dependence of asymmetric off-resonance long period fiber gratings

Fiber micro-knots are a promising and a cheap solution for advanced fiber-based sensors. We investigated complex fiber micro-knots in theory and experiment. We compared the measured spectral response and present an analytical study of simple micro-knots with double twists, twin micro-knots, figure-eight micro-knots, and tangled micro-knots. This research brings the simple fabrication process and robustness of fiber micro-knots into the world of complex resonators which may lead to novel optical devices based on fiber micro-knots.

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“…For completeness, we first analyze a simple fiber micro-knot [ 27 ]. We start by tapering a fiber down to a 6

m width over a length of 30–50 mm [ 28 , 29 ]. When a fiber is tapered below 20

m, the light is no longer guided by the core but by the cladding, which leads to an evanescence field outside the fiber.…”

Section: A Simple Micro-knotmentioning

confidence: 99%

Complex Fiber Micro-Knots

Shahal

Duadi

Linzon

et al. 2018

Sensors

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show abstract

“…We start by tapering a fiber down to a 6 µm width over a length of 30-50 mm [28,29]. When a fiber is tapered below 20 µm, the light is no longer guided by the core but by the cladding, which leads to an evanescence field outside the fiber.…”

Section: A Simple Micro-knotmentioning

confidence: 99%

Complex fiber micro-knots

Shahal

Duadi

Linzon

et al. 2018

Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XI

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“…We measured the statistics of ultrafast rogue waves in fiber lasers and found that the underlying mechanism is different than what was previously considered. We will continue to investigate extreme events in different schemes, such as phase locked fiber lasers, 6, 10-13 fiber lasers with unique states of polarization, 14,15 and different types of fiber components [16][17][18][19] We hope to utilize our temporal imaging to focus light through dispersive material and to create rogue waves for high resolution imaging with nano-particles. [20][21][22][23][24][25]…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

The picosecond structure of ultra-fast rogue waves

Klein

Shahal

Masri

et al. 2018

Real-Time Measurements, Rogue Phenomena, and Single-Shot Applications III

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We investigated ultrafast rogue waves in fiber lasers and found three different patterns of rogue waves: singlepeaks, twin-peaks, and triple-peaks. The statistics of the different patterns as a function of the pump power of the laser reveals that the probability for all rogue waves pattens increase close to the laser threshold. We developed a numerical model which prove that the ultrafast rogue waves patterns result from both the polarization mode dispersion in the fiber and the non-instantaneous nature of the saturable absorber. This discovery reveals that there are three different types of rogue waves in fiber lasers: slow, fast, and ultrafast, which relate to three different timescales and are governed by three different sets of equations: the laser rate equations, the nonlinear Schrodinger equation, and the saturable absorber equations, accordingly. This discovery is highly important for analyzing rogue waves and other extreme events in fiber lasers and can lead to realizing types of rogue waves which were not possible so far such as triangular rogue waves.

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Polarization dependence of asymmetric off-resonance long period fiber gratings

Cited by 33 publications

References 39 publications

Complex Fiber Micro-Knots

Complex Fiber Micro-Knots

Complex fiber micro-knots

The picosecond structure of ultra-fast rogue waves

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