scholarly journals Pulsed Blue Laser Diode Thermal Desorption Microplasma Imaging Mass Spectrometry

2021 ◽  
Author(s):  
Alexander Knodel ◽  
Ulrich Marggraf ◽  
Edeltraut Hoffmann-Posorske ◽  
Sebastian Burhenn ◽  
Sebastian Brandt ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Thermal Desorption ◽  
Laser Diode ◽  
Imaging Mass Spectrometry ◽  
Blue Laser ◽  
Blue Laser Diode

scholarly journals Pulsed Blue Laser Diode Thermal Desorption Microplasma Imaging Mass Spectrometry

2021 ◽  
Author(s):  
Alexander Knodel ◽  
Ulrich Marggraf ◽  
Edeltraut Hoffmann-Posorske ◽  
Sebastian Burhenn ◽  
Sebastian Brandt ◽  
...  
Keyword(s):  
Laser Diode ◽  
Imaging Mass Spectrometry ◽  
Ambient Air ◽  
Blue Laser ◽  
Imaging Method ◽  
Imaging Data ◽  
Imaging Application ◽  
Blue Laser Diode ◽  
Offset Correction ◽  
Time Required

An ambient air laser desorption, plasma ionization imaging method is developed and presented using a microsecond pulsed laser diode for desorption and the flexible microtube plasma for ionization of the neutral desorbate. Inherent parameters such as the laser repetition rate and pulse width are optimized to the imaging application. For the desorption substrate, copper spots on a copper-glass sandwich structure are used. This novel design enables imaging without ablating the metal into the mass spectrometer. On this substrate, fixed calibration markers are used to decrease the positioning error in the imaging process, featuring a 3D offset correction within the experiment. The image is both screened spot-by-spot and per line scanning at a constant speed, which allows direct comparison. In spot-by-spot scanning, a novel algorithm is presented to unfold and to reconstruct the imaging data. This approach significantly decreases the time required for the imaging process, which allows imaging even at decreased sampling rates and thus higher mass resolution. After the experiment, the raw data is automatically converted and interpreted by a second algorithm, which allows direct visualization of the image from the data, even on low-intensity signals. Mouse liver microtome cuts have been screened for dehydrated cholesterol, proving good agreement of the unfolded data with the morphology of the tissue. The method optically resolves 30 μm, with 30 μm diameter copper spots and a 10 μm gap. No conventional chemical matrices or vacuum conditions are required.

GaN-based blue laser diode with 6.0 W of output power under continuous-wave operation at room temperature

2021 ◽  
Vol 42 (11) ◽  
pp. 112801
Author(s):  
Feng Liang ◽  
Degang Zhao ◽  
Zongshun Liu ◽  
Ping Chen ◽  
Jing Yang ◽  
...  
Keyword(s):  
Laser Diode ◽  
Room Temperature ◽  
Continuous Wave ◽  
Chemical Vapor ◽  
Threshold Current ◽  
Stimulated Emission ◽  
Blue Laser ◽  
Organic Chemical ◽  
Blue Laser Diode ◽  
Continuous Wave Operation

Abstract In this work, we reported the room-temperature continuous-wave operation of 6.0 W GaN-based blue laser diode (LD), and its stimulated emission wavelength is around 442 nm. The GaN-based high power blue LD is grown on a c-plane GaN substrate by metal organic chemical vapor deposition (MOCVD), and the width and length of the ridge waveguide structure are 30 and 1200 μm, respectively. The threshold current is about 400 mA, and corresponding threshold current density is 1.1 kA/cm2.

Experimental Investigation on High-order Transverse-mode of the Pr：YLF Laser by a Blue Laser-diode Off-axis Pumping

2020 ◽  
Vol 49 (10) ◽  
pp. 1014001-1014001
Author(s):  
张锋宸 Feng-chen ZHANG ◽  
惠沉林 Chen-lin HUI ◽  
舒启鹤 Qi-he SHU ◽  
黄彩虹 Cai-hong HUANG ◽  
龚冬梅 Dong-mei GONG ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Laser Diode ◽  
Transverse Mode ◽  
High Order ◽  
Blue Laser ◽  
Blue Laser Diode

320 nm ultraviolet laser in blue laser diode double end pumped Pr:YLF crystal (Invited)

2020 ◽  
Vol 49 (12) ◽  
pp. 20201070-20201070
Author(s):  
李昕奇 Xinqi Li ◽  
曲大鹏 Dapeng Qu ◽  
陈晴 Qing Chen ◽  
刘天虹 Tianhong Liu ◽  
郑权 Quan Zheng
Keyword(s):  
Laser Diode ◽  
Blue Laser ◽  
Ultraviolet Laser ◽  
Blue Laser Diode

scholarly journals 4-Gbit/s visible light communication link based on 16-QAM OFDM transmission over remote phosphor-film converted white light by using blue laser diode

2015 ◽  
Vol 23 (26) ◽  
pp. 33656 ◽  
Author(s):  
José Ramón Durán Retamal ◽  
Hassan Makine Oubei ◽  
Bilal Janjua ◽  
Yu-Chieh Chi ◽  
Huai-Yung Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Laser Diode ◽  
White Light ◽  
Visible Light Communication ◽  
Blue Laser ◽  
Communication Link ◽  
Blue Laser Diode ◽  
Remote Phosphor ◽  
Phosphor Film

scholarly journals An ultrafast hydrogel photocrosslinking method for direct laser bioprinting

RSC Advances ◽  
2016 ◽  
Vol 6 (25) ◽  
pp. 21099-21104 ◽  
Author(s):  
Zongjie Wang ◽  
Xian Jin ◽  
Ru Dai ◽  
Jonathan F. Holzman ◽  
Keekyoung Kim
Keyword(s):  
Cell Viability ◽  
Laser Diode ◽  
Low Cost ◽  
Blue Laser ◽  
Blue Laser Diode ◽  
Direct Laser

We developed an ultrafast photocrosslinking method using a low-cost blue laser diode. Cell-laden hydrogels can be crosslinked within 10 seconds with over 90% cell viability. A microtube was fabricated using the system for bioprinting applications.

The Blue Laser Diode

2000 ◽  
Author(s):  
Shuji Nakamura ◽  
Stephen Pearton ◽  
Gerhard Fasol
Keyword(s):  
Laser Diode ◽  
Blue Laser ◽  
Blue Laser Diode
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