Clément Romano
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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: 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: 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: 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: 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: High-pulse-energy high-brightness Q-switched Tm<sup>3+</sup>:Ho<sup>3+</sup>-codoped triple-clad polarization- maintaining fiber laser
High-pulse-energy high-brightness Q-switched Tm<sup>3+</sup>:Ho<sup>3+</sup>-codoped triple-clad polarization- maintaining fiber laser Open
A Q-switched polarization-maintaining (PM) Thulium (Tm 3+ ):Holmium (Ho 3+ )-codoped triple-clad fiber (THTF) laser is under investigation with special focus on important optical parameters enabling efficient frequency conversion into mid-…
View article: Investigation of the pulse energy limits of actively Q-switched polarization-maintaining Tm<sup>3+</sup>-doped fiber lasers
Investigation of the pulse energy limits of actively Q-switched polarization-maintaining Tm<sup>3+</sup>-doped fiber lasers Open
A diode-pumped actively Q-switched polarization-maintaining Tm 3+ -doped fiber laser is reported generating pulse energies of 630 μJ, minimum pulse widths of 42 ns, and a maximum peak power of 13.9 kW with linear polarized output and diffr…
View article: 25 W 2 um broadband polarization-maintaining hybrid Ho- and Tm-doped fiber amplifier
25 W 2 um broadband polarization-maintaining hybrid Ho- and Tm-doped fiber amplifier Open
Current developments in LIDAR and atmospheric sensing experiments highlight the need for multi-watt, large bandwidth, high dynamic range polarization-maintaining optical amplifiers in the eye safe 1.9—2.15 μm band. So far, as an illustrati…
View article: kW pulsed nanosecond TDFL with direct modulation
kW pulsed nanosecond TDFL with direct modulation Open
We present a kW level pulsed laser based on a master oscillator power amplifier (MOPA) configuration. The directly modulated single frequency laser at 1952 nm was pulsed in the nanosecond regime with a repetition rate frequency from 10 kHz…
View article: Simulation of 2µm single clad thulium-doped silica fiber amplifiers by characterization of the<sup>3</sup>F<sub>4</sub>–<sup>3</sup>H<sub>6</sub>transition
Simulation of 2µm single clad thulium-doped silica fiber amplifiers by characterization of the<sup>3</sup>F<sub>4</sub>–<sup>3</sup>H<sub>6</sub>transition Open
We report measurements of absorption, gain, and the lifetime of the transition 3H6 - 3F4 for three commercially available thulium-doped single clad silica fibers. These measurements are used in a steady-state simulation of thulium-doped fi…
View article: 5W 1950nm Brillouin-free efficient single clad TDFA
5W 1950nm Brillouin-free efficient single clad TDFA Open
International audience
View article: Optimized design and performance of a shared pump single clad 2 µm TDFA
Optimized design and performance of a shared pump single clad 2 µm TDFA Open
We report the design, experimental performance, and simulation of a single stage, co- and counter-pumped Tmdoped fiber amplifier (TDFA) in the 2 μm signal wavelength band with an optimized 1567 nm shared pump source. We investigate the dep…
View article: Broadband 2-W Output Power Tandem Thulium-Doped Single Clad Fiber Amplifier at 2 $\mu$ m
Broadband 2-W Output Power Tandem Thulium-Doped Single Clad Fiber Amplifier at 2 $\mu$ m Open
International audience
View article: 20 W 1952 nm Tandem Hybrid Single and Double Clad TDFA
20 W 1952 nm Tandem Hybrid Single and Double Clad TDFA Open
International audience