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We experimentally demonstrate for the first time uniform and broadband supercontinuum generation in long tapered multimode fibers. This is achieved through an accelerated geometric parametric instability that forces the sidebands towards higher/lower frequencies.
We demonstrate that frequency generation in multimode graded-index fibers can be tailored through appropriate fiber design. This is achieved by exploiting a geometric parametric instability which can be utilized for developing novel fiber light sources.
A spatial pulse position modulation is proposed and experimentally validated for a 12 spatial channel transmission over 53km multi-mode fiber. Improved data rates up to 30% are demonstrated with respect to conventional QPSK.
We demonstrate an all-fiber, ring core photonic lantern to generate high quality OAM modes up to the second order at 1550nm. We achieved low-loss coupling of the lantern OAM modes into a ring core fiber.
We demonstrate amplification in a multimode cladding-pumped fiber amplifier supporting 36 spatial modes. Using a large core EDF, we obtain <0.5dB differential modal gain, 16dB gain, and 25dBm output power across the C-band.
We show the exploration of higher order core mode content in various designs of anti-resonant hollow core fiber using spatially and spectrally resolved imaging.
Background Dual wavelength laser generation has been of constant interest due to their applications in optical communications and teraheartz generation. A novel configuration for Dual-wavelength laser generation based on the use of a couple of multimode interference (MMI) filters is demonstrated in a ring cavity Erbium-doped fibre laser. Methods The MMI filters consist of a segment of no-core fibre...
We report an antiresonant hollow core fiber formed of 7 non-touching capillaries with inner tubes. The fiber has a core diameter of ∼33μm and a core wall of ∼780nm of thickness. We demonstrate robust single mode operation at 1064nm and broad transmission bandwidth.
10 spatial mode transmission over 40km multi-mode fiber (50μm core diameter) with low DMGD is demonstrated using low-loss all-fiber 10-port photonic lanterns and 20×20 multiple-input multiple-output time-domain equalizer. A maximum MDL of 4.5dB is observed.
Wavelength and mode-division multiplexed 4.45 km low-DMGD (0.05ns/km) 6-LP mode fibre transmission employing low-loss all-fibre 10-port photonic lanterns is demonstrated using a 20×20 multiple input multiple-output time-domain equalizer. We measured an MDL of 8.7± 1.7dB over 10 hours.
We fabricate ten- and fifteen-mode photonic lanterns by using microstructured preforms that enables a repeatable fabrication process and scalability to large number of modes. Mode selective capability is demonstrated by independently exciting individual LP mode.
We transmit over all 30 spatial and polarization modes of a 22.8-km multimode fiber. 15-mode photonic lanterns enabled low-loss coupling into and out of the fiber and a time-multiplexed coherent receiver facilitates measurement of all 30 signals.
Low-loss all-fiber mode selective photonic-lanterns capable of exciting six spatial fiber modes (4 LP modes) are demonstrated. Mode field profile characterization of photonic lanterns using both step and graded index fibers is presented.
24.3GBaud 32QAM WDM transmission over a novel 1km hole-assisted few-mode multi-core fiber is demonstrated, resulting in 5.1Tbit/s spatial supercarriers (4Tbit/s net) with a gross spectral efficiency of 102bits/s/Hz, and a gross aggregate transmission rate of 255 Tbit/s (200 Tbit/s net).
A gross transmission rate of 204 Tbit/s is demonstrated over a novel 1 km hole-assisted step-index few-mode multi-core fiber with 7 cores, where each core allows the co-propagation of 3 spatial modes.
Single-mode and higher-order supermodes in the strongly-coupled multi-core fibers have been investigated. These fibers offer high mode density, ease of (de)multiplexed, and tunability in mode coupling as well as differential modal group delay.
A fiber-optic liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. We show that MMI and self-image effects can be effectively applied for multiplexed liquid level sensing, because the natural response as a band-pass filter for each sensor is clearly distinct from each other, in the case for several sensors working at the same time. Using a standard 105/125...
An all-fiber continuous and discrete liquid level sensor using Multimode Interference (MMI) effects is demonstrated. The sensing range and also multiplexed operation can be easily controlled by just changing the length of the MMI sensor.
A stable optofluidically tunable fiber laser based on Multimode Interference (MMI) effect is experimentally demonstrated. The tuning mechanism relies on modifying the effective width of the multimode fiber (MMF) using a liquid with a specific refractive index, which in turns tunes the peak wavelength of the filter. We easily demonstrate a tunability of almost 40 nm with a side-mode suppression ratio...
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