Axel Schülzgen
YOU?
Author Swipe
View article: 2.2 kW single-mode narrow-linewidth laser delivery through a hollow-core fiber
2.2 kW single-mode narrow-linewidth laser delivery through a hollow-core fiber Open
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery because of their exceptionally low nonlinearities and high damage thresholds. While these fiber designs offer gre…
View article: 2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber
2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber Open
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery, thanks to their exceptionally low nonlinearities and high damage thresholds. While these fiber designs offer gre…
View article: Laser <sup>2</sup> : A two-domain photon-phonon laser
Laser <sup>2</sup> : A two-domain photon-phonon laser Open
The laser is one of the greatest inventions in history. Because of its ubiquitous applications and profound societal impact, the concept of the laser has been extended to other physical domains including phonon lasers and atom lasers. Quit…
View article: 2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber
2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber Open
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery, thanks to their exceptionally low nonlinearities and high damage thresholds. While these fiber designs offer gre…
View article: 2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber
2.2 kW Single-Mode Narrow-Linewidth Laser Delivery Through a Hollow-Core Fiber Open
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery, thanks to their exceptionally low nonlinearities and high damage thresholds. While these fiber designs offer gre…
View article: Adaptive inverse mapping: a model-free semi-supervised learning approach towards robust imaging through dynamic scattering media
Adaptive inverse mapping: a model-free semi-supervised learning approach towards robust imaging through dynamic scattering media Open
Imaging through scattering media is a useful and yet demanding task since it involves solving for an inverse mapping from speckle images to object images. It becomes even more challenging when the scattering medium undergoes dynamic change…
View article: Unsupervised Full-color Cellular Image Reconstruction through Disordered Optical Fiber
Unsupervised Full-color Cellular Image Reconstruction through Disordered Optical Fiber Open
Recent years have witnessed the tremendous development of fusing fiber-optic imaging with supervised deep learning to enable high-quality imaging of hard-to-reach areas. Nevertheless, the supervised deep learning method imposes strict cons…
View article: Extending the transmission of a silica hollow core fiber to 4.6 µm
Extending the transmission of a silica hollow core fiber to 4.6 µm Open
In this work, an anti-resonant hollow core fiber was designed for 3-5 µm transmission and fabricated from fused silica. Due to strong core confinement, low transmission loss was measured in the MWIR, with only 0.128 dB/m loss at 4.05 µm an…
View article: Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres
Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres Open
An optical gauge based on coupled multi-core fiber is proposed and experimentally demonstrated. By using direct laser writing to selectively break the fiber index profile symmetry, asymmetric mode coupling between cores is introduced. This…
View article: Editorial: Localization of Light in Randomly Disordered and Quasiperiodic Systems
Editorial: Localization of Light in Randomly Disordered and Quasiperiodic Systems Open
EDITORIAL article Front. Phys., 18 February 2022 | https://doi.org/10.3389/fphy.2022.858087
View article: Learning-Based Image Transport Through Disordered Optical Fibers With Transverse Anderson Localization
Learning-Based Image Transport Through Disordered Optical Fibers With Transverse Anderson Localization Open
Fiber-optic imaging systems play a unique role in biomedical imaging and clinical practice due to their flexibilities of performing imaging deep into tissues and organs with minimized penetration damage. Their imaging performance is often …
View article: Simultaneous Sensing of Refractive Index and Temperature With Supermode Interference
Simultaneous Sensing of Refractive Index and Temperature With Supermode Interference Open
[EN]In general, a sensor is used to monitor a single parameter only, and in many cases, a reference sensor is necessary to compensate the effect of temperature. Here, we demonstrate that a single supermode interferometer is capable of moni…
View article: Temperature-insensitive curvature sensor based on Bragg gratings written in strongly coupled multicore fiber
Temperature-insensitive curvature sensor based on Bragg gratings written in strongly coupled multicore fiber Open
A novel temperature-insensitive optical curvature sensor has been proposed and demonstrated. The sensor is fabricated by inscribing fiber Bragg gratings with short lengths into a piece of strongly coupled multicore fiber (SCMCF) and splice…
View article: Ultraviolet to mid-infrared gas-filled anti-resonant hollow-core fiber lasers
Ultraviolet to mid-infrared gas-filled anti-resonant hollow-core fiber lasers Open
We will present our recent works on fiber lasers enabled by noble and Raman-active gas-filled anti-resonant hollow-core fiber (ARHCF) technology. First, we will present the generation of supercontinuum (SC) spanning from 200 nm to 4 µm bas…
View article: Composed multicore fiber structure for direction-sensitive curvature monitoring
Composed multicore fiber structure for direction-sensitive curvature monitoring Open
The present work deals with a curvature sensor that consists of two segments of asymmetric multicore fiber (MCF) fusion spliced with standard single mode fiber (SMF). The MCF comprises three strongly coupled cores; one of such cores is at …
View article: Packaged Multi-Core Fiber Interferometer for High-Temperature Sensing
Packaged Multi-Core Fiber Interferometer for High-Temperature Sensing Open
[EN]A small size and compactly packaged optical sensor for high-temperature measurements is reported. The sensor consists of a short piece of multi-core fiber (MCF) spliced to the distal end of a single-mode fiber. The packaging consists o…
View article: Single-mode, low loss hollow-core anti-resonant fiber designs
Single-mode, low loss hollow-core anti-resonant fiber designs Open
In this paper, we numerically investigate various hollow-core anti-resonant (HC-AR) fibers towards low propagation and bend loss with effectively single-mode operation in the telecommunications window. We demonstrate how the propagation lo…
View article: Transverse mode-switchable fiber laser based on a photonic lantern
Transverse mode-switchable fiber laser based on a photonic lantern Open
We propose and experimentally demonstrate an intra-cavity transverse mode-switchable fiber laser based on a mode-selective photonic lantern and a few-mode Er-doped fiber amplifier. The six lowest-order LP modes can lase independently and a…
View article: Disorder-induced high-quality wavefront in an Anderson localizing optical fiber
Disorder-induced high-quality wavefront in an Anderson localizing optical fiber Open
High-quality coherent wavefronts are extremely useful in optical communications and lasers. Disorder is usually considered as a source of noise and deviation from ideal designs for generating high-quality beams in photonic devices. Here, w…
View article: Image Transport Through Meter-Long Randomly Disordered Silica-Air Optical Fiber
Image Transport Through Meter-Long Randomly Disordered Silica-Air Optical Fiber Open
We present a randomly disordered silica-air optical fiber featuring a 28.5% air filling fraction in the structured region, and low attenuation below 1 dB per meter at visible wavelengths. The quality of images transported through this fibe…
View article: Single-frequency blue laser fiber amplifier
Single-frequency blue laser fiber amplifier Open
An all-fiber amplifier for a single-frequency blue laser was demonstrated for the first time, to the best of our knowledge. Over 150 mW continuous-wave single-transverse-mode blue laser output was obtained with a 10 m 1000 ppm thulium-dope…
View article: Multicore Optical Fiber Sensors
Multicore Optical Fiber Sensors Open
We review recent multicore optical fiber-based interferometric sensors for vibration, strain and temperature monitoring. Simple, highly sensitive sensors operating in reflection and transmission mode have been fabricated using short segmen…