Article
Optics
Wei Wen Wong, Naiyin Wang, Chennupati Jagadish, Hark Hoe Tan
Summary: This study presents a novel approach to realize on-chip microlasers with directional emission in an all-dielectric, bottom-up grown material system. By coupling the laser emission into a vertical nanowire, efficient optical coupling is achieved and the emission directivity and side mode suppression can be improved by tuning the geometric parameters of the system.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Jinhwa Gene, Dong-Il Yeom, Seung Kwan Kim, Sun Do Lim
Summary: The study introduces a high-energy, low-frequency 2-micron femtosecond fiber laser designed for laser surgery and vehicle laser detection and ranging applications. The laser, incorporating thulium-doped fiber gains and hybrid mode-locking techniques, achieved the highest pulse energy and lowest pulse rate reported to date, with pulse duration and output optical spectrum characteristics also evaluated for stability over extended periods.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Ruiling Zhao, Yuyao Guo, Liangjun Lu, Muhammad Shemyal Nisar, Jianping Chen, Linjie Zhou
Summary: A hybrid dual-gain integrated external cavity laser with full C-band wavelength tunability is presented, using a Si3N4 photonic circuit to combine two reflective semiconductor optical amplifier gain channels. The integration of a Vernier ring filter in the circuit selects a single longitudinal mode and reduces the laser linewidth, resulting in higher output power and narrower linewidth compared to single gain operation. Promising for applications in optical communications and light detection and ranging systems.
Article
Optics
Shree Krishnamoorthy, Anil Prabhakar
Summary: Actively mode-locked fiber ring lasers (AMLLs) with loss modulators are used to generate approximately 100 ps pulses with 100MHz repetition. RF detuning around the fundamental frequency, f(0), causes unlocking of cavity modes and partial mode locking. Multiple RF inputs are shown to relock and extend the locking range of a detuned partially mode-locked AMLL. Experimental verification of the theoretical predictions was done using a custom-built Yb3+ -doped AMLL with f(0) = 26MHz, operating at a wavelength of 1064nm. The AMLL demonstrated an extension of the locking range and a reduction in pulsewidth.
Article
Optics
Zhongliang Qiao, Xiang Li, Jia XuBrian Sia, WanJun Wang, Hong Wang, Lin Li, Zaijin Li, Zhibin Zhao, Guojun Liu, Hao Chen, Yi Qu, Xin Gao, Baoxue Bo, Chongyang Liu
Summary: This study utilizes double quantum wells passively mode locked lasers to achieve subpicosecond pulse generation, finding that operational parameters have significant effects on the mode-locking characteristics of the laser, especially temperature causing an increase in pulse width. This has important implications for improving the performance of the laser.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yasmine Ibrahimi, Sylvain Boust, Quentin Wilmart, Jean-Francois Paret, Alexandre Garreau, Karim Mekhazni, Catherine Fortin, Francois Duport, Jean-Marc Fedeli, Corrado Sciancalepore, Stephanie Garcia, Frederic van Dijk
Summary: This paper demonstrates the generation of low free spectral range mode-locked laser using hybrid III-V/Si3N4 butt coupling, achieving the lowest repetition rate for a hybrid integrated mode-locked laser. The generated frequency comb has a 30 dB bandwidth of 2.8 nm (349 GHz), and active and harmonic mode locking up to the sixth harmonic were also shown in the study.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Ewoud Vissers, Stijn Poelman, Camiel Op de Beeck, Kasper Van Gasse, Bart Kuyken
Summary: This paper demonstrates for the first time that a high-performance mode-locked laser can be achieved using chip scale silicon nitride waveguides with a butt-coupling integration technique.
Article
Physics, Multidisciplinary
Rui Gong, Yalin Geng, Li Pei, Huai Wei
Summary: In this paper, a 2-μm synchronous multi-wavelength fiber laser based on cascaded Mamyshev regenerators is proposed. A stable synchronous multi-wavelength mode-locked laser was achieved through numerical simulation, providing six-channel ultrashort pulses.
FRONTIERS IN PHYSICS
(2023)
Article
Optics
Sten Wenzel, Olaf Brox, Pietro Della Casa, Hans Wenzel, Bassem Arar, Sabrina Kreutzmann, Markus Weyers, Andrea Knigge, Andreas Wicht, Guenther Traenkle
Summary: The spectral linewidth of semiconductor lasers is an important parameter for many applications. Increasing the optical cavity length and removing the active layers can improve the coherence of the laser. By using a two-step epitaxy method, the extended cavity diode laser concept is realized. The extended passive section reduces the laser linewidth without deteriorating the electro-optical properties or frequency stability.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Wei Wen Wong, Zhicheng Su, Naiyin Wang, Chennupati Jagadish, Hark Hoe Tan
Summary: Technological advances will boost the demand for miniature lasers, but challenges such as sidewall roughness must be addressed. Research demonstrates scalable epitaxial growth technique for laser fabrication, achieving efficient room-temperature lasing and mode engineering.
Article
Engineering, Electrical & Electronic
Junting Liu, Shuai Ye, Feifei Wang, Xiaohui Sun, Vladislav Khayrudinov, Harri Lipsanen, Hongkun Nie, He Yang, Kejian Yang, Baitao Zhang, Jingliang He
Summary: In this study, indium phosphide nanowires were fabricated and used as a saturable absorber in a continuous-wave mode-locked femtosecond laser. The results demonstrate that indium phosphide nanowires can generate femtosecond pulses in solid-state lasers, making them a promising candidate for ultrafast photonic devices.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Optics
Jiaqiang Lin, Zhipeng Dong, Tianhao Dong, Xuexiao Ma, Chuansheng Dai, Peijun Yao, Chun Gu, Lixin Xu
Summary: In this study, an all-fiber bidirectional mode-locked laser based on nonlinear multimode interference is reported. It can generate asynchronous pulse trains in different directions and operate in different states. This work provides a new platform for studying the dynamic characteristics of bidirectional mode-locked lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Vladyslav Cherniak, Marlene Zander, Martin Moehrle, Wolfgang Rehbein, Jan C. Balzer
Summary: This study compares two types of monolithically integrated mode-locked laser diodes, namely quantum dot MLLD and quantum well MLLD. By tuning the pump current, temperature, and reverse voltage, the researchers obtained the repetition frequency range and the RF linewidth for each type.
Article
Optics
Yunyun Ding, Wolfgang Rehbein, Martin Moehrle, Marlene Zander, Martin Schell, Kevin Kolpatzeck, Jan C. Balzer
Summary: High-performance buried heterostructure (BH) C-band InAs/InP quantum dot (QD) and L-band InGaAsP/InP quantum well (QW) two-section passively mode-locked lasers (MLLs) were investigated. Short pulse trains with sub-ps pulse widths were achieved by compensating dispersion, demonstrating the potential for photonic applications in optical communications.
Article
Optics
Zhao Yan, Yu Han, Liying Lin, Ying Xue, Chao Ma, Wai Kit Ng, Kam Sing Wong, Kei May Lau
Summary: This research introduces a monolithic InP/SOI platform that combines the advantages of silicon photonics and InP photonics, enabling various photonic functionalities and demonstrating potential. This marks a critical step towards fully-integrated Si-based PICs.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Marija Trajkovic, Fabrice Blache, Helene Debregeas, Kevin A. Williams, Xaveer J. M. Leijtens
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Sylwester Latkowski, Dzmitry Pustakhod, Michail Chatzimichailidis, Weiming Yao, Xaveer J. M. Leijtens
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Chemistry, Analytical
Yohan Barbarin, Alexandre Lefrancois, Vincent Chuzeville, Sylvain Magne, Laurent Jacquet, Thomas Elia, Karol Woirin, Christelle Collet, Antoine Osmont, Jerome Luc
Article
Instruments & Instrumentation
Yohan Barbarin, Gael Le Blanc, Thierry d'Almeida, Marin Hamrouni, Marie Roudot, Jerome Luc
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
Article
Instruments & Instrumentation
J. Vich, Y. Barbarin, G. Le Blanc, C. Chauvin, M. Ribiere, R. Maisonny, T. Duvaut, T. d'Almeida
Summary: The CEA operates several High-Pulsed Power (HPP) drivers for dynamic loading experiments to provide quantitative information about the response of various materials. They developed a device capable of pre-heating samples to improve their ability to explore materials' behavior over a wide range of thermodynamic paths and starting from various non-ambient conditions. The preheating device shows potential value for extending the range of studies in dynamic loading experiments for various materials under ramp compression using HPP drivers.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Electrical & Electronic
Xaveer Leijtens, Rui Santos, Kevin Williams
Summary: This study presents high density multi-channel optical multiprobes for on-wafer parallel testing of photonic integrated circuits. The probes, fabricated in an oxynitride platform, demonstrated simultaneous passive alignment of 32 optical connections with low optical power variation. The concept was further validated through wavelength-dependent net modal gain measurements of integrated semiconductor optical amplifiers.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Lukas Puts, Xaveer Leijtens, Pavel Cheben, Jens Schmid, Sander Reniers, Daniele Melati
Summary: The study demonstrates the anti-reflection properties of lithographically defined subwavelength gratings applied to integrated waveguides on the InP membrane-on-silicon platform. The use of gradient index effect creates a smooth index transition between core material and air, achieving reflections below -30 dB at a wavelength of 1550 nm. Experimental results show that relative reflections as low as -25 dB can be achieved using Mach-Zehnder interferometers as test structures.
Article
Instruments & Instrumentation
Yohan Barbarin, Gael Le Blanc, Marie Roudot, Jerome Luc
Summary: This study demonstrates the advantages of our 16-wavelength photonic Doppler velocimetry system over conventional systems in shock physics experiments. The system's reliability and accuracy are validated through a dedicated crosstalk comparative experiment and discussions on velocity uncertainties.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Optics
Yohan Barbarin, Alexandre Lefrancois, Vincent Chuzeville, Pascal Hereil, Sofiane Echaoui, Louis Thamie, Jerome Luc
Summary: This article uses long silica chirped fiber Bragg gratings (CFBGs) to continuously measure shock and detonation velocities. These thin probes can be directly inserted into high-explosive samples and the use of a polymer fiber increases sensitivity at low pressure levels. The article manufactures and characterizes 22 mm long multimode polymer CFBGs and conducts a first detonation experiment on a narrow Formex strip, demonstrating feasibility and discussing associated uncertainties.
Article
Chemistry, Analytical
Jeremi Mapas, Alexandre Lefrancois, Herve Aubert, Sacha Comte, Yohan Barbarin, Maylis Lavayssiere, Benoit Rougier, Alexandre Dore
Summary: In this paper, a neural network approach is used to solve an electromagnetic inverse problem involving solid dielectric materials subjected to shock impacts and interrogated by a millimeter-wave interferometer. It is shown that a more accurate estimation of the shock wavefront and particle velocities can be obtained from training an appropriate convolutional neural network, especially in the important case of short-duration waveforms of few microseconds.
Article
Chemistry, Analytical
Sebastien Maqueda, Julien Perchoux, Clement Tronche, Jose Javier Imas Gonzalez, Marc Genetier, Maylis Lavayssiere, Yohan Barbarin
Summary: In this paper, it is demonstrated that a compact and inexpensive interferometric sensor based on the self-mixing effect in the laser cavity can be used for shock wave characterization. The sensor measures the changes in refractive index induced by the shock wave and utilizes the self-mixing interferometry scheme. The architecture of the dynamic sensor and the experimental setup design involving a shock tube are described, along with the experimental measurements for a shock wave pressure amplitude of 5 bar and their interpretation based on established acousto-optic models.
Article
Chemistry, Analytical
Antony Coustou, Alexandre Lefrancois, Patrick Pons, Yohan Barbarin
Summary: This study investigated the capacitive effect and electromagnetic coupling induced by impact experiments with a gas gun or powder gun on the measurement chain. The experiment results showed reduced bandwidth and increased noise on the signals. With modeling and calculations, the study reproduced these effects and identified the capacitive effect in the sample.
Proceedings Paper
Engineering, Electrical & Electronic
Sylwester Latkowski, Dzmitry Pustakhod, Michail Chatzimichailidis, Xaveer Leijtens, Kevin Williams
2020 22ND INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Y. Barbarin, V. Chuzeville, V. Colas, J. -M. Chevalier, P. Hereil, L. Jacquet, J. Luc
2019 IEEE PHOTONICS CONFERENCE (IPC)
(2019)
Proceedings Paper
Optics
K. A. Williams, M. Trajkovic, V Rustichelli, F. Lemaitre, H. P. M. M. Ambrosius, X. J. M. Leijtens
OPTICAL INTERCONNECTS XIX
(2019)
