Simultaneous detection of ambient methane, nitrous oxide, and water vapor using an external-cavity quantum cascade laser
Sign Up to like & getrecommendations! Published in 2018 at "Atmospheric Environment"
DOI: 10.1016/j.atmosenv.2018.07.001
Abstract: Abstract A compact laser-based absorption sensor system associated with a 152-m path length absorption cell for simultaneous second harmonic (2f) detection of atmospheric nitrous oxide (N2O), methane (CH4), and water vapor (H2O) is presented. An… read more here.
Keywords: cavity quantum; detection; nitrous oxide; water vapor ... See more keywords
InGaAs quantum well based dual-wavelength external cavity surface emitting laser for wideband tunable mid-infrared difference frequency generation
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Luminescence"
DOI: 10.1016/j.jlumin.2018.08.063
Abstract: Abstract A two-chip vertical external cavity surface emitting laser with dual- wavelength output is presented. The active region of gain chip 1, designed for 960 nm wavelength, is composed of 6 repeats of strain uncompensated In0.185Ga0.815As/… read more here.
Keywords: surface emitting; quantum; cavity surface; dual wavelength ... See more keywords
Silicon reflectors for external cavity lasers based on ring resonators
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2016.08.043
Abstract: Abstract We propose and experimentally investigate types of silicon ring reflectors on Silicon-On-Insulator (SOI) platform. These reflectors are used for realizing the silicon hybrid external cavity lasers. A suspended edge coupler is used to connect… read more here.
Keywords: cavity lasers; silicon reflectors; hybrid external; external cavity ... See more keywords
Tunable high-power blue external cavity semiconductor laser
Sign Up to like & getrecommendations! Published in 2017 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2017.03.015
Abstract: Abstract A commercially available high-power GaN-based blue laser diode has been operated in a simple Littrow-type external cavity (EC). Two kinds of EC configurations with the grating lines perpendicular (A configuration) and parallel (B configuration)… read more here.
Keywords: high power; tunable high; power; external cavity ... See more keywords
Fundamental transverse mode operation of a type-II vertical-external-cavity surface-emitting laser at 1.2 µm
Sign Up to like & getrecommendations! Published in 2017 at "Electronics Letters"
DOI: 10.1049/el.2016.3732
Abstract: The modal properties of a novel vertical-external-cavity surface-emitting laser with (GaIn)As/Ga(AsSb)/(GaIn)As type-II quantum wells are analysed. The device, emitting at a wavelength around 1175 nm, is operated in TEM00 mode and optimised for a high… read more here.
Keywords: surface emitting; emitting laser; vertical external; cavity surface ... See more keywords
Mapping of external cavity modes for a laser diode subject to phase-conjugate feedback.
Sign Up to like & getrecommendations! Published in 2017 at "Chaos"
DOI: 10.1063/1.5008392
Abstract: We numerically investigate the dynamics of a semiconductor laser subject to phase-conjugate optical feedback. We explore the effects of the laser model and feedback parameters for the generation of time-periodic oscillations of the output power… read more here.
Keywords: cavity modes; feedback; external cavity; subject phase ... See more keywords
Low-drift-rate external cavity diode laser
Sign Up to like & getrecommendations! Published in 2022 at "Review of Scientific Instruments"
DOI: 10.1063/5.0079210
Abstract: We present the design, construction, and simulation of a simple, low-cost external cavity diode laser with a measured free-running frequency drift rate of 1.4(1) MHz/h at 852 nm. This performance is achieved in a compact aluminum… read more here.
Keywords: cavity; drift rate; external cavity; laser ... See more keywords
External cavity lasers using stripe mirrors with different mirror width
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Modern Optics"
DOI: 10.1080/09500340.2017.1288829
Abstract: Abstract We present the study of an external cavity laser using a stripe mirror and a grating for the optical feedback. As the most important parameter in this system, the width of the stripe mirror… read more here.
Keywords: cavity lasers; lasers using; external cavity; cavity ... See more keywords
An external-cavity quantum cascade laser operating near 5.2 µm combined with cavity ring-down spectroscopy for multi-component chemical sensing
Sign Up to like & getrecommendations! Published in 2018 at "Laser Physics"
DOI: 10.1088/1555-6611/aaaa55
Abstract: We report on the performance of a widely tunable continuous wave mode-hop-free external-cavity quantum cascade laser operating at λ ~ 5.2 µm combined with cavity ring-down spectroscopy (CRDS) technique for high-resolution molecular spectroscopy. The CRDS… read more here.
Keywords: cavity quantum; external cavity; cavity; spectroscopy ... See more keywords
Simulation of structural design with high coupling efficiency in external cavity semiconductor laser
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Semiconductors"
DOI: 10.1088/1674-4926/40/10/102302
Abstract: For external cavity semiconductor lasers (ECSLs), high coupling efficiency is critical to reducing the linewidth. In this paper, the coupling efficiency between the laser diode and the waveguide grating has been improved, with proposals for… read more here.
Keywords: coupling efficiency; high coupling; external cavity; cavity semiconductor ... See more keywords
Thermal Tunable Narrow Linewidth External Cavity Laser With Thermal Enhanced FBG
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Photonics Technology Letters"
DOI: 10.1109/lpt.2017.2648889
Abstract: We demonstrated a mode-hop-free external cavity laser (ECL) design incorporating a semiconductor gain chip and a fiber Bragg grating (FBG) with enhanced thermal sensitivity. The compact ECL features a narrow linewidth of 35 kHz and… read more here.
Keywords: external cavity; cavity laser; narrow linewidth; thermal tunable ... See more keywords