Marc Eichhorn
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View article: Investigation of heat-spreaders as a passive thermal management element in SWIR fiber lasers
Investigation of heat-spreaders as a passive thermal management element in SWIR fiber lasers Open
This article examines the utility of heat spreaders as an alternative to conventional heat management techniques for fiber lasers and amplifiers by numerical modeling scalable for prediction of heat loads in high power laser amplifiers and…
View article: Actively pulse shaped hybrid rare-earth-doped silica fiber/Ho<sup>3+</sup>:YAG MOPA system at 2048 nm
Actively pulse shaped hybrid rare-earth-doped silica fiber/Ho<sup>3+</sup>:YAG MOPA system at 2048 nm Open
In this study, an efficient hybrid fiber and solid-state master oscillator power amplifier (MOPA) system is introduced. This system is composed of an actively pulse-shaped Ho 3+ - and Tm 3+ -doped silica fiber MOPA at 2048 nm. A subsequent…
View article: Temperature and pump modulation investigation of an Er:Yb co-doped fiber laser with optimized SWaP
Temperature and pump modulation investigation of an Er:Yb co-doped fiber laser with optimized SWaP Open
This paper presents the results of experimental and theoretical studies of the influence of temperature and pump modulation on an erbium:ytterbium co-doped fiber laser in context for an optimized size, weight, and power (SWaP) integration.…
View article: High-energy nanosecond pulse extraction from a Tm<sup>3+</sup>-doped photonic crystal fiber laser emitting at 2050 nm with narrow linewidth
High-energy nanosecond pulse extraction from a Tm<sup>3+</sup>-doped photonic crystal fiber laser emitting at 2050 nm with narrow linewidth Open
A nanosecond-pulsed diode-pumped Tm 3+ -doped fiber laser (TDFL) operating at 2050 nm is reported based on a flexible photonic crystal fiber (PCF) with a core diameter of 50 µm. Analytical evaluation of reabsorption effects and optimizatio…
View article: Review on the impact of the molecular structure of pectin on the associative phase separation with proteins
Review on the impact of the molecular structure of pectin on the associative phase separation with proteins Open
Associative phase separation is a phenomenon behind a range of undesirable and desirable changes in foods. Re-visiting the factors affecting associative phase separation between pectin and proteins, it becomes obvious that enthalpic factor…
View article: A Method to Correct the Temporal Drift of Single-Photon Detectors Based on Asynchronous Quantum Ghost Imaging
A Method to Correct the Temporal Drift of Single-Photon Detectors Based on Asynchronous Quantum Ghost Imaging Open
Single-photon detection and timing has attracted increasing interest in recent years due to their necessity in the field of quantum sensing and the advantages of single-quanta detection in the field of low-level light imaging. While simple…
View article: Optimization of the slope efficiency of a core-pumped thulium-doped fiber laser by the thermally diffused expanded-core technique
Optimization of the slope efficiency of a core-pumped thulium-doped fiber laser by the thermally diffused expanded-core technique Open
We report on the mode field adaption of an active thulium-doped fiber by using the thermally-diffused expanded-core technique. The fiber core diffusion is analyzed by splice transmission measurements and visually from side view images. The…
View article: A method to correct the temporal drift of single photon detectors, based on asynchronous quantum ghost imaging
A method to correct the temporal drift of single photon detectors, based on asynchronous quantum ghost imaging Open
Single photon detection and timing gathered increasing interest in the last few years due to both its necessity in the field of quantum sensing and the advantages of single quanta detection in the field of low level light imaging. While si…
View article: Investigation of the polymer material perforation time: comparison between two fiber laser wavelengths
Investigation of the polymer material perforation time: comparison between two fiber laser wavelengths Open
This study investigated the perforation time of polyamide 6.6 using fiber lasers at two different wavelengths: 1070 and 1943 nm. The novelty of this research lies in the comparison of perforation times at equivalent laser irradiances on th…
View article: Development and error analysis of a 2 µm-centered polarimeter for complete Stokes’ vectors measurements
Development and error analysis of a 2 µm-centered polarimeter for complete Stokes’ vectors measurements Open
Developing a device to retrieve the full Stokes’ vector at high-speed requires a careful design. We present an analysis of the measurement error of a polarimeter as a function of all optical component defects.
View article: Actively pulse shaped linearly polarized nanosecond hybrid Ho<sup>3+</sup> and Tm<sup>3+</sup>-doped silica fiber & Ho<sup>3+</sup>:YAG MOPA at 2048 nm
Actively pulse shaped linearly polarized nanosecond hybrid Ho<sup>3+</sup> and Tm<sup>3+</sup>-doped silica fiber & Ho<sup>3+</sup>:YAG MOPA at 2048 nm Open
Ho 3+ :YAG amplifiers are able to efficiently scale pulse energy at wavelengths far shorter than the main emission peak. For 24 W input power at 2048 nm a signal output power of 81.6 W is reached, resulting in 5.3 dB gain.
View article: Lidar systems testing considerations for field use
Lidar systems testing considerations for field use Open
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View article: Beam quality improvement in a linear ZPG OPO pumped by a Q-switched compact high-power Ho<sup>3+</sup>:YAG laser
Beam quality improvement in a linear ZPG OPO pumped by a Q-switched compact high-power Ho<sup>3+</sup>:YAG laser Open
We present a Ho 3+ :YAG laser pumped by a Tm 3+ -doped fiber laser that delivers pulses with an energy of 2.2 mJ and a pulse duration of 20 ns at a repetition rate of 25 kHz. The average output power is 58 W, while the pulse peak power is …
View article: Temperature investigation of low SWaP thulium-doped fiber lasers
Temperature investigation of low SWaP thulium-doped fiber lasers Open
We investigate the temperature dependence of an in-band core-pumped thulium-doped fiber laser with a low SWaP (size, weight, and power) architecture. The temperature investigation is carried out both experimentally and numerically by a sim…
View article: Limitations of homogeneous and segmented single-crystal compact TEM00-mode Ho3+:YAG laser resonators
Limitations of homogeneous and segmented single-crystal compact TEM00-mode Ho3+:YAG laser resonators Open
We present investigations on output power limitations of near-diffraction-limited compact $$\hbox {Ho}^{3+}$$ :YAG laser resonators employing a homogeneous or segmented laser crystal. An approach for designing a segmented crystal is …
View article: 3D Quantum Ghost Imaging
3D Quantum Ghost Imaging Open
We present current results of a novel type of setup for quantum ghost imaging based on asynchronous single-photon timing using SPAD detectors, first presented in [1]. The scheme enables photon pairing without fixed delays and thus overcome…
View article: 3D Quantum Ghost Imaging
3D Quantum Ghost Imaging Open
We present current results of a novel type of setup for quantum ghost imaging based on asynchronous single-photon timing using SPAD detectors, first presented in [1]. The scheme enables photon pairing without fixed delays and thus overcome…
View article: Nanosecond pulsed narrow-linewidth all-fiber source for ZGP-OPO pumping
Nanosecond pulsed narrow-linewidth all-fiber source for ZGP-OPO pumping Open
We demonstrate a pulsed three-stage master oscillator power amplifier (MOPA) at a wavelength of 2047 nm and its application for mid-IR generation via pumping a ZnGeP 2 (ZGP) optical parametric oscillator (OPO). A maximum MOPA output power …
View article: Iterative 3D modeling of thermal effects in end-pumped continuous-wave HO3+:YAG lasers
Iterative 3D modeling of thermal effects in end-pumped continuous-wave HO3+:YAG lasers Open
We present a highly accurate model for end-pumped continuous-wave $$\hbox {Ho}^{3+}$$ :YAG laser resonators, based on a vectorial beam propagation method (BPM) algorithm. Thermal effects in the laser crystal like thermal lensing and …
View article: Iterative 3D modeling of thermal effects in end-pumped continuous-wave Ho3+:YAG lasers
Iterative 3D modeling of thermal effects in end-pumped continuous-wave Ho3+:YAG lasers Open
We present a highly accurate model for end-pumped continuous-wave Ho3+:YAG laser resonators, based on a vectorial beam propagation method (BPM) algorithm. Thermal effects in the laser crystal like thermal lensing and stress birefringence a…
View article: The influence of resonator outcoupling and losses on the photon statistics of the LASER
The influence of resonator outcoupling and losses on the photon statistics of the LASER Open
An extension to the quantum-mechanical laser master equation for the density operator is derived to incorporate the beam-splitter effect caused by typical dielectric laser output couplers. This effect gives rise to a significant change in …