Results 21 to 30 of about 26,111 (260)

New Opportunities in Mid-Infrared Emission Control

open access: yesSensors, 2015
Tunable laser absorption spectroscopy (TLAS) has been well accepted as a preferred measurement technique for many industrial applications in recent years, especially for in situ applications. Previously, mainly near-infrared lasers have been used in TLAS
Peter Geiser
doaj   +1 more source

Efficient Wavelength-Tunable Gain-Switching and Gain-Switched Mode-Locking Operation of a Heavily Er3+-Doped ZBLAN Mid-Infrared Fiber Laser

open access: yesIEEE Photonics Journal, 2017
We report on an efficient wavelength-tunable gain-switched and gain-switched mode-locked Er3+-doped double-clad fiber laser with a linear cavity. Stable gain-switching and gain-switched mode-locking were achieved with slope efficiencies of 28.6% and 34.5%
Yanlong Shen   +5 more
doaj   +1 more source

Application of transition metal dichalcogenides in mid‐infrared fiber laser

open access: yesNano Select, 2021
Due to the special working wavelength and superb beam quality, the mid‐infrared fiber laser has a wide application prospect in the fields of biomedicine, military defense, laser manufacturing, atmospheric detection, space communication, etc.
Mengli Liu   +4 more
doaj   +1 more source

Highly-Efficient Pulsed Mid-Infrared Generation Based on Intracavity Difference Frequency Mixing

open access: yesIEEE Photonics Journal, 2021
We demonstrated highly-efficient pulsed mid-infrared generation based on intracavity difference frequency mixing inside a continuous-wave (CW) PPLN optical parametric oscillator (OPO).
Peng Wang   +3 more
doaj   +1 more source

Comparative Modeling of Infrared Fiber Lasers

open access: yesPhotonics, 2018
The modeling and design of fiber lasers facilitate the process of their practical realization. Of particular interest during the last few years is the development of lanthanide ion-doped fiber lasers that operate at wavelengths exceeding 2000 nm.
Slawomir Sujecki   +10 more
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

open access: yesFEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara   +3 more
wiley   +1 more source

Research status of rare-earth-ion-doped infrared laser

open access: yesFrontiers in Physics
Infrared lasers have an extensive range of applications in sensing, detection, communication, medicine, and other fields. The principle of directly pumping solid-state lasers is simple, and it can easily achieve high-power and high-efficiency laser ...
Jing-Xiang Zhang   +17 more
doaj   +1 more source

InGaN-LD-Pumped ${\rm Pr}^{3+}$: ${\rm LiYF}_{4}$ Continuous-Wave Laser at 915 nm

open access: yesIEEE Photonics Journal, 2014
We demonstrate the first InGaN-LD-pumped room temperature and continuous-wave laser operation of a Pr3+: LiYF4 crystal at 915 nm. A maximum output power up to 78 mW with a laser slope efficiency of about 17% is obtained. The round-trip optical losses are
Biao Qu   +9 more
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

A Diode-Pumped Dual-Wavelength Tm, Ho: YAG Ceramic Laser

open access: yesIEEE Photonics Journal, 2016
A diode-pumped dual-wavelength CW Tm, Ho: YAG ceramic laser was demonstrated for the first time to our knowledge. A maximum output power of ∼1.2 W with a beam quality factor ${\rm{M}}^{2}\,= \,1.19$ has been generated from the 3at.% Tm, 0 ...
Pian Liu   +6 more
doaj   +1 more source

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