Results 31 to 40 of about 2,390,699 (275)

High bandwidth frequency modulation of an external cavity diode laser using an intracavity lithium niobate electro-optic modulator as output coupler

APL Photonics, 2022
We present a novel approach to high bandwidth laser frequency modulation. A lithium niobate chip is used as an intracavity electro-optic modulator in a tunable cateye external cavity diode laser.
S. Palmer, A. Boes, G. Ren, T. G. Nguyen, S. J. Tempone-Wiltshire, N. Longhurst, P. M. Farrell, A. Steiner, Ch. D. Marciniak, T. Monz, A. Mitchell, R. E. Scholten   +11 more
doaj   +1 more source

Active optical clock lasing on the Cs 7S1/2-6P3/2 transition under a weak magnetic field

Frontiers in Physics, 2022
In the bad-cavity limit, the collective atomic dipole is highly coherent, resulting in the phase information of an active optical clock (AOC) laser primarily stored in the atomic gain medium.
Tiantian Shi, Jianxiang Miao, Jia Zhang, Jingbiao Chen, Jingbiao Chen   +4 more
doaj   +1 more source

Linewidth and phase noise characteristics of DFB fibre lasers

, 2004
The anomalous linewidth behavior in a DFB fiber laser is investigated. It is shown that not only does the linewidth deviate drastically from the Schawlow-Townes linewidth formula by increasing with pump and laser power, but it also varies significantly ...
Voo, N.Y., Horak, P., Morten Ibsen, N. Y. Voo, Ibsen, M., Peter Horak, Wei H. Loh, Loh, W.H.   +7 more
core   +1 more source

High Pulse Energy, Narrow Linewidth 6.45 μm from an Optical Parametric Oscillator in BaGa₄Se₇ Crystal

Applied Sciences, 2022
This paper presents a high pulse energy, narrow linewidth, mid-infrared (MIR) laser at 6.45 μm, based on a BaGa4Se7 (BGSe) crystal optical parametric oscillator (OPO) pumped by 1.064 μm laser. The maximum pulse energy at 6.45 μm was up to 1.23 mJ, with a
Yu Shen, Ning Wen, Chunxiao Li, Nan Zong, Jiyong Yao, Jinquan Chang, Ya Wen, Feng Yang, Wenlong Li, Hongwei Gao, Yong Bo, Qinjun Peng, Dafu Cui   +12 more
doaj   +1 more source

Characterization of Hybrid InP-TriPleX Photonic Integrated Tunable Lasers Based on Silicon Nitride (Si ₃N₄/SiO₂) Microring Resonators for Optical Coherent System

IEEE Photonics Journal, 2018
We demonstrate detailed characterization results of a hybrid InP-TriPleX photonic integrated tunable laser based on silicon nitride microring resonators.
Yi Lin, Colm Browning, Roelof Bernardus Timens, Douwe H. Geuzebroek, Chris G. H. Roeloffzen, Marcel Hoekman, Dimitri Geskus, Ruud M. Oldenbeuving, Rene G. Heideman, Youwen Fan, Klaus J. Boller, Liam P. Barry   +11 more
doaj   +1 more source

Invisible but not inaccessible—Revealing transient oligomers formed by intrinsically disordered proteins with solution NMR and complementary methods

FEBS Letters, EarlyView.
Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley   +1 more source

Neurochemical Endpoints to Inform Early‐Stage Trials of Spinocerebellar Ataxia 2 and 3 in a Multisite Setting

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neurochemical levels measured by brain MR spectroscopy (MRS) have been proposed as endpoints for clinical trials in early‐stage spinocerebellar ataxia (SCA) trials. We tested their trial‐readiness by quantifying neurochemicals in three affected brain regions in early‐stage cohorts of SCA2 and SCA3, examining their reproducibility in ...
James M. Joers, Yaqiao Wei, Dinesh K. Deelchand, Adam Berrington, Young Woo Park, Guita Banan, Michal Povazan, Jens T. Rosenberg, André J. W. van der Kouwe, Tetsuo Ashizawa, Khalaf O. Bushara, Chiadi U. Onyike, Sub H. Subramony, Jeremy D. Schmahmann, Brian J. Soher, Peter B. Barker, Thomas H. Mareci, Eva‐Maria Ratai, Lynn E. Eberly, Gülin Öz   +19 more
wiley   +1 more source

Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement

Sensors, 2016
The absolute distance between the mirrors of a Fabry-Perot cavity with a spacer from an ultra low expansion material was measured by an ultra wide tunable laser diode.
Radek Šmíd, Martin Čížek, Břetislav Mikel, Jan Hrabina, Josef Lazar, Ondřej Číp   +5 more
doaj   +1 more source

Phase noise measurement of a narrow linewidth CW laser using delay lines approaches

, 2011
International audienceTwo different laser phase noise measurement techniques are compared. One of these two techniques is based on a conventional and low cost delay line system which is usually set up for the linewidth measurement of semiconductor lasers.
Lacroix, Pierre, Saleh, Khaldoun, Llopis, Olivier, Brahimi, Houda, Merrer, Pierre-Henri   +4 more
core   +5 more sources

Dynamic Device Characteristics and Linewidth Measurement of InGaN/GaN Laser Diodes

IEEE Photonics Journal, 2021
We report on the characterization and analysis of a GaN-based distributed feedback laser diode (DFB-LD) with 3rd-order laterally etched sidewall gratings centered at a wavelength of 420 nm.
Steffan Gwyn, Scott Watson, Thomas Slight, Martin Knapp, Shaun Viola, Pavlo Ivanov, Weikang Zhang, Amit Yadav, Edik Rafailov, Mohsin Haji, Kevin E Doherty, Szymon Stanczyk, Szymon Grzanka, Piotr Perlin, Stephen P Najda, Mike Leszczyski, Anthony E Kelly   +16 more
doaj   +1 more source