The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
H. Zimer - One of the best experts on this subject based on the ideXlab platform.
-
Dense wavelength beam combining of an external thin-film filter multi-Laser Cavity stabilized diode Laser module
Conference on Lasers and Electro-Optics, 2016Co-Authors: M. Haas, S. Nagel, Simon Rauch, Alexander Killi, H. ZimerAbstract:We report on kW-class dense wavelength beam combining of a diode Laser module which is spectrally stabilized using a novel external multi-Laser Cavity architecture based on a thin-film filter as a dispersive optical element.
-
Thin-film filter, wavelength-locked, multi-Laser Cavity for dense wavelength beam combining of broad-area Laser diode bars.
Optics letters, 2015Co-Authors: M. Haas, Alexander Killi, C. Tillkorn, S. Ried, M. Ginter, H. ZimerAbstract:We report on individual wavelength locking of a multiplet of 100-μm broad-area Laser diode emitters arranged on a 50% fill-factor bar by means of a single external multi-Laser Cavity using an ultra-narrowband thin-film filter as a dispersive optical element. The achieved wavelength-locked output power is 216 W, corresponding to an electrical-to-optical conversion efficiency of about 49.7%. The 45 emitters of the Laser diode bar are stabilized within a spectral range of about 6.4 nm. Our approach is suited for killowatt-class dense wavelength beam combining of direct diode Lasers.
Joh E Owers - One of the best experts on this subject based on the ideXlab platform.
-
widely tunable ring resonator semiconductor Lasers
Applied Sciences, 2017Co-Authors: Ti Komljenovic, Linju Liang, Ruili Chao, Jared Hulme, Sudharsana Srinivasa, Michael L Davenpo, Joh E OwersAbstract:Chip-scale widely-tunable Lasers are important for both communication and sensing applications. They have a number of advantages, such as size, weight, and cost compared to mechanically tuned counterparts. Furthermore, they allow for integration in more complex integrated photonic chips to realize added functionality. Here we give an extensive overview of such Lasers realized by utilizing ring resonators inside the Laser Cavity. Use of ring resonators for tuning allows for wide-tunability by exploiting the Vernier effect, and at the same time improves the Laser linewidth, as effective Cavity length is increased at ring resonance. In this review, we briefly introduce basic concepts of Laser tuning using ring resonators. Then, we study a number of Laser Cavity configurations that utilize two ring resonators, and compare their tuning performance. We introduce a third ring resonator to the Laser Cavity, study three different Cavity configurations utilizing three ring resonators, and select the optimal one, for which we show that Laser tuning is straightforward, provided there are monitor photodetectors on-chip. Finally, we give a literature overview showing superior linewidth performance of ring-based widely-tunable Lasers.
-
monolithically integrated high q rings for narrow linewidth widely tunable Lasers
IEEE Journal of Quantum Electronics, 2015Co-Authors: Ti Komljenovic, Joh E OwersAbstract:We theoretically analyze the use of fully integrated high- $Q$ ring cavities (intrinsic $Q \sim 1$ million) with widely tunable semiconductor Lasers to realize narrow linewidth Lasers. Different configurations are studied, including cases where the high- $Q$ Cavity is external to the Laser Cavity and provides filtered optical feedback to the Laser Cavity and cases where the high- $Q$ Cavity is an integral part of the Laser Cavity. We show that the current heterogeneous silicon platform should allow subkilohertz instantaneous linewidths, and we outline the advantages and disadvantages of different high- $Q$ Cavity placements.
M. Haas - One of the best experts on this subject based on the ideXlab platform.
-
Dense wavelength beam combining of an external thin-film filter multi-Laser Cavity stabilized diode Laser module
Conference on Lasers and Electro-Optics, 2016Co-Authors: M. Haas, S. Nagel, Simon Rauch, Alexander Killi, H. ZimerAbstract:We report on kW-class dense wavelength beam combining of a diode Laser module which is spectrally stabilized using a novel external multi-Laser Cavity architecture based on a thin-film filter as a dispersive optical element.
-
Thin-film filter, wavelength-locked, multi-Laser Cavity for dense wavelength beam combining of broad-area Laser diode bars.
Optics letters, 2015Co-Authors: M. Haas, Alexander Killi, C. Tillkorn, S. Ried, M. Ginter, H. ZimerAbstract:We report on individual wavelength locking of a multiplet of 100-μm broad-area Laser diode emitters arranged on a 50% fill-factor bar by means of a single external multi-Laser Cavity using an ultra-narrowband thin-film filter as a dispersive optical element. The achieved wavelength-locked output power is 216 W, corresponding to an electrical-to-optical conversion efficiency of about 49.7%. The 45 emitters of the Laser diode bar are stabilized within a spectral range of about 6.4 nm. Our approach is suited for killowatt-class dense wavelength beam combining of direct diode Lasers.
Roberto Morandotti - One of the best experts on this subject based on the ideXlab platform.
-
Laser Cavity Solitons and Turing Patterns in Microresonator Filtered Lasers
2020 IEEE Photonics Conference (IPC), 2020Co-Authors: Alessia Pasquazi, Hualong Bao, Maxwell Rowley, Juan Sebastian Totero Gongora, Sai T Chu, Brent E Little, Pierre-henry Hazard, Luana Olivieri, Antonio Cutrona, Roberto MorandottiAbstract:We summarise our results on the generation of temporal Laser Cavity-solitons and Turing patterns in a system comprising an optical micro-Cavity nested in a fibre Laser. We will discuss the experiments at the light of out theoretical model, commenting on their potential.
-
Laser Cavity solitons in micro resonators
OSA Advanced Photonics Congress (AP) 2019 (IPR Networks NOMA SPPCom PVLED) (2019) paper IT2A.2, 2019Co-Authors: Hualong Bao, Andrew Cooper, Maxwell Rowley, Luigi Di Lauro, Juan Sebastian Totero Gongora, Sai T Chu, Brent E Little, Gianluca Oppo, Roberto Morandotti, David J MossAbstract:We report the observation of temporal Laser Cavity-solitons in a system comprising an optical micro-Cavity nested in a fibre Laser.
-
observation of Laser Cavity solitons in micro resonators
European Quantum Electronics Conference, 2019Co-Authors: Hualong Bao, Andrew Cooper, Maxwell Rowley, Luigi Di Lauro, Juan Sebastian Totero Gongora, Sai T Chu, Brent E Little, Gianluca Oppo, Roberto Morandotti, David J MossAbstract:Optical frequency combs based on micro-Cavity resonators, also known as ‘micro-combs’, are ready to achieve the full capability of their bulk counterparts but on an integrated footprint [1]. They have enabled major breakthroughs in spectroscopy, communications, microwave photonics, frequency synthesis, optical ranging, quantum sources and metrology. Of particular relevance was the recent experimental implementation of temporal Cavity-solitons [2,3]. Temporal Cavity-solitons in micro-resonators are described by the well-known Lugiato-Lefever equation. Currently, these self-localised waves form on top of a strong background of radiation, usually containing 95% of the total power [4] and require active control of an external driving Laser — a complex process which limits the choice of fundamental parameters such as the repetition-rate. Developing simple methods for controlling and generating highly efficient, self-localised pulses is one of the most compelling challenges to overcome, in anticipation of the widespread use of micro-combs outside of laboratory environments.
-
Laser Cavity soliton microcombs
Nature Photonics, 2019Co-Authors: Hualong Bao, Andrew Cooper, Maxwell Rowley, Luigi Di Lauro, Juan Sebastian Totero Gongora, Sai T Chu, Brent E Little, Gianluca Oppo, Roberto MorandottiAbstract:MicroCavity-based frequency combs, or ‘microcombs’1,2, have enabled many fundamental breakthroughs3–21 through the discovery of temporal Cavity-solitons. These self-localized waves, described by the Lugiato–Lefever equation22, are sustained by a background of radiation usually containing 95% of the total power23. Simple methods for their efficient generation and control are currently being investigated to finally establish microcombs as out-of-the-lab tools24. Here, we demonstrate microcomb Laser Cavity-solitons. Laser Cavity-solitons are intrinsically background-free and have underpinned key breakthroughs in semiconductor Lasers22,25–28. By merging their properties with the physics of multimode systems29, we provide a new paradigm for soliton generation and control in microcavities. We demonstrate 50-nm-wide bright soliton combs induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold22, measuring a mode efficiency of 75% versus the theoretical limit of 5% for bright Lugiato–Lefever solitons23. Finally, we can tune the repetition rate by well over a megahertz without any active feedback. By nesting a Kerr microresonator in a fibre loop with gain, 50-nm-wide bright microCavity-based soliton combs with a mode efficiency of 75% can be induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold, facilitating real-world applications.
Kang Yang - One of the best experts on this subject based on the ideXlab platform.
-
Fiber-optic displacement sensor based on the DBR fiber Laser
Photonic Sensors, 2013Co-Authors: Guoyu Li, Yan Li, Kang YangAbstract:The fiber-optic displacement sensor based on the distributed Bragg reflector fiber Laser is proposed, that is, the fiber Laser Cavity is attached to the measured object, when the measured object is stretched or contracted, and the length of the fiber Laser Cavity is also stretched or contracted accordingly. In view of the nonlinearity of the fiber-optic displacement sensor, the calibration based on piezoelectric ceramics is applied to improve the linearity of the displacement sensor. Experiment results show that the fiber-optic displacement sensor has a linear response with the nominal working distance of 90 μm.
-
Fiber-optic displacement sensor based on the DBR fiber Laser
Photonic Sensors, 2013Co-Authors: Guoyu Li, Yan Li, Kang YangAbstract:The fiber-optic displacement sensor based on the distributed Bragg reflector fiber Laser is proposed, that is, the fiber Laser Cavity is attached to the measured object, when the measured object is stretched or contracted, and the length of the fiber Laser Cavity is also stretched or contracted accordingly. In view of the nonlinearity of the fiber-optic displacement sensor, the calibration based on piezoelectric ceramics is applied to improve the linearity of the displacement sensor. Experiment results show that the fiber-optic displacement sensor has a linear response with the nominal working distance of 90 μm.
-
The fiber-optic displacement sensor based on the DBR fiber Laser
OFS2012 22nd International Conference on Optical Fiber Sensors, 2012Co-Authors: Guoyu Li, Yan Li, Kang YangAbstract:The fiber-optic displacement sensor based on the distributed Bragg reflector fiber Laser is proposed, that is, the fiber Laser Cavity is attached to the measured object, when the measured object is stretched or contracted, and the length of the fiber Laser Cavity is changing too. In view of nonlinearity of the fiber-optic displacement sensor, the calibration based on piezoelectric ceramics is applied to improve the linearity of the displacement sensor. Experiment results show that the fiber-optic displacement sensor has a linear response with the nominal working distance of 90 μm. Furthermore, the fiber-optic displacement sensor may realize the dynamic measurement.
