The linear and nonlinear properties of laser-drawn silicon core fibers (SCFs) are characterized in the telecom band for first time. We show that SCFs produced with micrometer-sized diameters exhibit low optical losses (∼1 dB/cm) straight from drawing tower, indicating a high-quality crystalline materials. Moreover, by using an adapted fiber tapering method, diameter these can be precisely tailored to obtain longitudinal profiles optimized loss coupling, uniform waist regions over lengths up...

The pursuit of advanced fiber laser technologies has driven research toward unconventional manufacturing techniques. In this work, we present an erbium-doped made using powder-based additive manufacturing. An Er 3+ /Al co-doped silica glass rod was printed powder deposition and then used as the core material in a preform. drawn from preform exhibited complete, desired functionality linked to doping. To demonstrate this, standing wave cavity formed with feedback attained cleaved ends...

An experimental, laboratory-scale optical fiber drawing tower based on CO laser heating has been developed and used to fabricate speciality fiber. The was utilized in a symmetric four beam system. localized responsive time of the laser-based furnace beneficial for manufacturing crystalline core fibers, specifically, silicon fibers. Moreover, specific absorption properties radiation silica have evaluated with aid finite element modeling. In comparison more traditional <mml:math...

We demonstrate a method for rapid prototyping of optical fibers. Silica-based glass rods were 3D printed using laser powder deposition. Different doping the is evaluated, including alumina, titania, and erbium-doped glass. The subsequently used as core material in preforms with fibers drawn laser-based draw tower. A transmission loss 3.2 dB/m was found fiber 1 wt% titania doped pure silica cladding. Using this fabrication method, from to could be achieved within few hours.

Rapid manufacturing of high purity fused silica glass micro-optics using a filament-based 3D printer has been demonstrated. A multilayer 5 × microlens array was printed and subsequently characterized, showing fully dense lenses with uniform focal lengths good imaging performance. surface roughness on the order

Here, we present an innovative preform manufacturing technique for specialty optical fibers based on a carbon monoxide laser heating rotating preform. The setup performance is evaluated with the aid of finite element modeling. fabrication process described in detail using silicon core preforms as benchmark. hybrid material nature such addressed, together relevant characteristics, difference thermal conductivity and expansion. Silicon wide range sizes were manufactured, proving viability this...

Anti-resonant guiding negative curvature hollow core fiber operating at a wavelength of 1064 nm is used in the cavity an ytterbium (Yb <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> ) mode-locked laser to increase length without increasing nonlinear phase shift. Repetition rates from 37 5.4 MHz are demonstrated using lengths up 48 m length. Each constructed produced coherent 4-ps 1/e2 duration soliton-like pulses, with no degradation...

Ultralow nonlinearity hollow-core negative curvature fibre is used in a mode-locked Ytterbium laser to prevent the onset of pulse breakup at low repetition-rates. Identical peak-power limit 37MHz and 11MHz experimentally demonstrated.

A Mach-Zehnder interferometer is formed in the transverse plane of an optical fibre. This exploited to monitor temperature any given fibre real time, without predesigned sensing elements engineered into and a need access ends. The by refraction at air-glass interface subsequent internal reflections within response then measured quadrature phase shift detection interference pattern. For context, this compared finite element modelling previously studied Fabry-Pérot configuration. was from room...

We report the development of a specialty optical fiber preform fabrication system based on carbon monoxide (CO) laser heating. The heating is accomplished via single-beam arrangement integrated into rotating glass lathe. CO output power and its beam quality are affected by absorption radiation water vapor present in surrounding air. This addressed construction an enclosed fully motorized to enable processing dry air environment. performance evaluated, ability maintain desired temperature...

We present a technique for measuring the phase and amplitude distribution of light guided in twisted coreless photonic crystal fiber (or indeed any fiber), enabling full characterization orbital angular momentum states.

Integrated quantum sources are proving to be the most effective technology of for scalable applications. A platform that satisfies all requirements has not prevailed yet. In this framework, we report, best our knowledge, first demonstration a photon pair source in silicon core fiber. The fiber, only 58 mm long, works at room temperature and shows an intrinsic brightness 570 kHz/nm/mW2 coincidence-to-accidental ratio 133 ± 2 around 1.55 μm wavelength. low propagation losses platform, ∼0.3...

The optical fiber itself can function as a partially reflecting concentric cavity interferometer when transversely probed by focused laser beam. In this study, the thermal response of heated CO 2 -laser beam was characterized monitoring back-scattered interference pattern. Simultaneous measurement Bragg wavelength shift an inscribed, high-temperature stable grating allowed for calibration temperature-dependent phase interferometer. presented technique allows in-situ non-contact temperature...

A quadrature phase-shift detection system for interferometry has been conceptualized and evaluated. The main components, a microcontroller two photodetectors, make versatile low-cost displacement measurements or more generally phase-change measurements. is capable of sampling at 5 kHz with spatial resolution 1 nm.

Silicon core fibers are a promising candidate for optoelectronic and photonic applications. Fabrication post-processing of those is thus far done without precise knowledge the processing temperatures. Here, simple technique presented that allows in-situ temperature monitoring during thermal silicon fibers. The was probed across melting point cooling rates above 3500 °C s-1 were measured. found to be molten at 1281 °C, more than 100 below bulk point. This attributed stress inbuilt fabrication process.

Silicon core optical fibres have been fabricated using an experimental draw tower based on a CO laser furnace. Fabricated achieved submicron size and shown record low loss of 0.1 dBcm.

We investigate self-phase modulation in 28m of negative curvature anti-resonant hollow-core fiber pressurized with argon. A 9.6ps pulse is spectrally broadened to 7.6nm, at 20bar pressure, and compressed 420fs 8μJ output energy.

The data used to generate figures 3 - 7. Including: zip file of spectral csv files the heat map in figure 3; Excel containing normalised spectra examples from three experimental cavities for 4; auto correlation traces including a longer time scale trace inset 5; measured mode locking and multi-pulsing thresholds six with theoretical plot 6; an expressed nonlinear phase shift pi shown

Silica fibers are highly desired due to their robustness and easy integration with existing infrastructure. Although fabrication of silica gain can be performed using well-established methods e.g., Modified Chemical Vapor Deposition (MCVD), each production cycle time-consuming expensive. Additive manufacturing (AM) on the other hand is an attractive way fabrication, where reduced waste short cycles widely recognized. Today, AM commonly used make functional components prototypes.

Monitoring the back-scattered light from a microsphere, acting as low-Q concentric cavity interferometer, enables non-contact, in-situ measurement of diameter variations. The interferometric technique is used for improving ellipticity during microsphere fabrication and characterization.

Using a transversely focused laser beam the optical fiber itself can function as partially reflecting concentric cavity interferometer. By monitoring of back- scattered interference signal temperature measurements approaching glass softening point is demonstrated.

Optical fibre consisting of a pure silicon core in silica cladding combines the advantageous properties waveguides with convenience optical fibre. However, quality these fibres is highly dependent on crystalline structure and purity silicon. The fabrication requires engineering thermal gradients during drawing process to ensure optimal crystallisation Here, we investigated effects draw speed analyse induced stresses at multiple stages process. exposure while contact was found increase...