scholarly journals High-Efficiency Mini-Slab Laser Based on Tm-doped Double Tungstate Crystal

2021 ◽  
Vol 2067 (1) ◽  
pp. 012009
Author(s):  
S M Vatnik ◽  
I A Vedin ◽  
M D Kolker ◽  
A A Pavlyuk
Keyword(s):  
Output Power ◽  
Duty Cycle ◽  
Room Temperature ◽  
High Efficiency ◽  
Laser Cavity ◽  
Active Elements ◽  
Double Tungstate ◽  
Slab Laser ◽  
Cavity Design ◽  
Tungstate Crystal

Abstract We report on highly-efficient room-temperature lasing in 5at.%Tm:KLu(WO4)2 mini-slabs side-pumped by a 35W diode bar. QCW (duty cycle ∼ 14%) output power of 1.47 W at 1908 nm has been demonstrated with optical and slope efficiencies being of 33 and 43% respectively. In our experiments, we used samples of active elements produced in the slabs form with Brewster’s angle cut faces and original laser cavity design.

High efficiency Ho:YLF slab laser with 125 Wcontinuous-wave output power

2021 ◽  
Author(s):  
Qingchen Wang ◽  
Qunlong Long ◽  
Yuan Gao ◽  
Jianyong Xue ◽  
Zhaopeng Xu ◽  
...  
Keyword(s):  
Output Power ◽  
High Efficiency ◽  
Slab Laser

High efficiency Tm:YAG slab laser with hundred-watts-level output power

2016 ◽  
Vol 55 (10) ◽  
pp. 2498 ◽  
Author(s):  
Pian Liu ◽  
Lin Jin ◽  
Xuan Liu ◽  
Haitao Huang ◽  
Deyuan Shen
Keyword(s):  
Output Power ◽  
High Efficiency ◽  
Slab Laser

scholarly journals High-efficiency continuous-wave single-mode room-temperature operation of Cr:CdSe single-crystal laser with output power of 23 W

2019 ◽  
Vol 27 (9) ◽  
pp. 12090 ◽  
Author(s):  
Mikhail K. Tarabrin ◽  
Dmitry V. Ustinov ◽  
Sergey M. Tomilov ◽  
Vladimir A. Lazarev ◽  
Valeriy E. Karasik ◽  
...  
Keyword(s):  
Single Crystal ◽  
Output Power ◽  
Room Temperature ◽  
High Efficiency ◽  
Continuous Wave ◽  
Single Mode ◽  
Crystal Laser ◽  
Room Temperature Operation

scholarly journals 0.18µm-CMOS Rectifier with Boost-converter and Duty-cycle-control for Energy Harvesting

2018 ◽  
Vol 7 (2) ◽  
pp. 161-168
Author(s):  
Roskhatijah Radzuan ◽  
Mohd Khairul Mohd Salleh ◽  
Nuha A. Rhaffor ◽  
Shukri Korakkottil Kunhi Mohd
Keyword(s):  
Energy Harvesting ◽  
Power Management ◽  
Output Power ◽  
Duty Cycle ◽  
Management System ◽  
High Efficiency ◽  
Boost Converter ◽  
Cmos Process ◽  
Rectifier Circuit ◽  
Power Management System

Existing works on battery-less of energy harvesting systems often assume as a high efficiency of rectifier circuit for power management system. In practice, rectifier circuit often varies with output power and circuit complexity. In this paper, based on a review of existing rectifier circuits for the energy harvesters in the literature, an integrated rectifier with boost converter for output power enhancement and complexity reduction of power management system is implemented through 0.18-micron CMOS process. Based on this topology and technology, low threshold-voltage of MOSFETs is used instead of diodes in order to reduce the power losses of the integrated rectifier circuit. Besides, a single switch with the duty-cycle control is introduced to reduce the complexities of the integrated boost converter. Measurement results show that the realistic performances of the rectifier circuit could be considerably improved based on the performances showed by the existing study.

High efficiency, diode pumped Nd:YAG ceramics slab laser with 230 W continuous-wave output power

2012 ◽  
Vol 51 (18) ◽  
pp. 4224 ◽  
Author(s):  
Antonio Lapucci ◽  
Marco Ciofini ◽  
Maurizo Vannoni ◽  
Andrea Sordini
Keyword(s):  
Output Power ◽  
High Efficiency ◽  
Continuous Wave ◽  
Continuous Wave Output Power ◽  
Slab Laser ◽  
Diode Pumped

Clustering-Triggered Efficient Room Temperature Phosphorescence from Nonconventional Luminophores

2019 ◽  
Author(s):  
Shuyuan Zheng ◽  
Taiping Hu ◽  
Xin Bin ◽  
Yunzhong Wang ◽  
Yuanping Yi ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Spin Orbit Coupling ◽  
Design Rationale ◽  
Emission Mechanism ◽  
Room Temperature Phosphorescence ◽  
Electronic Interactions ◽  
Energy Gaps ◽  
Theoretical Results

Pure organic room temperature phosphorescence (RTP) and luminescence from nonconventional luminophores have gained increasing attention. However, it remains challenging to achieve efficient RTP from unorthodox luminophores, on account of the unsophisticated understanding of the emission mechanism. Here we propose a strategy to realize efficient RTP in nonconventional luminophores through incorporation of lone pairs together with clustering and effective electronic interactions. The former promotes spin-orbit coupling and boost the consequent intersystem crossing, whereas the latter narrows energy gaps and stabilizes the triplets, thus synergistically affording remarkable RTP. Experimental and theoretical results of urea and its derivatives verify the design rationale. Remarkably, RTP from thiourea solids with unprecedentedly high efficiency of up to 24.5% is obtained. Further control experiments testify the crucial role of through-space delocalization on the emission. These results would spur the future fabrication of nonconventional phosphors, and moreover should advance understanding of the underlying emission mechanism.<br>

scholarly journals A 2.1 GHz, 210 μW, —189 dBc/Hz DCO with Ultra Low Power DCC Scheme

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 805
Author(s):  
Shi Zuo ◽  
Jianzhong Zhao ◽  
Yumei Zhou
Keyword(s):  
Low Power ◽  
Current Efficiency ◽  
Phase Noise ◽  
Duty Cycle ◽  
Semiconductor Manufacturing ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Cmos Process ◽  
Ultra Low Power ◽  
Measured Phase

This article presents a low power digital controlled oscillator (DCO) with an ultra low power duty cycle correction (DCC) scheme. The DCO with the complementary cross-coupled topology uses the controllable tail resistor to improve the tail current efficiency. A robust duty cycle correction (DCC) scheme is introduced to replace self-biased inverters to save power further. The proposed DCO is implemented in a Semiconductor Manufacturing International Corporation (SMIC) 40 nm CMOS process. The measured phase noise at room temperature is −115 dBc/Hz at 1 MHz offset with a dissipation of 210 μμW at an oscillating frequency of 2.12 GHz, and the resulin figure-of-merit is s −189 dBc/Hz.

Fast, high-efficiency, and homogeneous room-temperature cathodoluminescence of ZnO scintillator thin films on sapphire

2006 ◽  
Vol 89 (24) ◽  
pp. 243510 ◽  
Author(s):  
M. Lorenz ◽  
R. Johne ◽  
T. Nobis ◽  
H. Hochmuth ◽  
J. Lenzner ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
High Efficiency
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