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Volker Sonnenschein and Hideki Tomita
A wide variety of applications require high peak laser intensity in conjunction with a narrow spectral linewidth. Typically, injection-locked amplifiers have been employed for this purpose, where a continuous wave oscillator is amplified in a secondary e...
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Gianluigi Caccianiga, Gerard Rey, Marco Baldoni, Paolo Caccianiga, Alessandro Baldoni and Saverio Ceraulo
In periodontology, lasers have been suggested for the nonsurgical treatment of chronic periodontitis. Many wavelengths were tested, but unfortunately, most parts were not efficient. An Nd:YAG laser was applied in a specific protocol named the laser-assis...
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Yan Wang, Hao Wu, Chao Chen, Yinli Zhou, Yubing Wang, Lei Liang, Zhenhua Tian, Li Qin and Lijun Wang
External cavity diode laser emitting at around 1550 nm with an ultra-high side mode suppression ratio can be applied in the field of high-dynamic-range testing and measurement.
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Liwei Xu, Yingyi Li, Jun Cai, Wanli Zhao, Tongyu Liu, Tongyu Dai, Youlun Ju and Yu Ding
A graphene passively Q-switched Nd:YAG laser experienced resonant pumping by an 885 nm laser diode (LD), as demonstrated in this paper. In the continuous-wave operation, the maximum average output power was up to 1.8 W with the absorbed pump power being ...
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Yiming Jiang, Tie Zhang, Gaoxuan Wang and Sailing He
A dual-gas photoacoustic spectroscopy (PAS) sensor based on wavelength modulation spectroscopy (WMS) was developed and experimentally demonstrated. Distributed feedback (DFB) laser diodes, emitting at 1512 and 1653 nm, were utilized as the excitation sou...
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Sunghyun So, Nakwon Jeong, Aran Song, Jungho Hwang, Daehae Kim and Changyeop Lee
It is important to monitor the temperature and H2O concentration in a large combustion environment in order to improve combustion (and thermal) efficiency and reduce harmful combustion emissions. However, it is difficult to simultaneously measure both in...
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Wei Wang, Qin Zhao, Wenqing Gao, Zhenyue Hu, Qihang Zhao and Sen Yang
A numerical analysis method is provided as an efficient design tool for the side-pumping lasers of laser diode (LD) arrays. The temperature distributions and thermo-optic effects of the laser rod in the segmented circular LD array side-pumping configurat...
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Flaminia Chellini, Alessia Tani, Sandra Zecchi-Orlandini, Marco Giannelli and Chiara Sassoli
Although photobiomodulation (PBM) has proven promising to treat wounds, the lack of univocal guidelines and of a thorough understanding of light?tissue interactions hampers its mainstream adoption for wound healing promotion. This study compared murine a...
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Min-Gyu Jeon, Deog-Hee Doh and Yoshihiro Deguchi
In this study, the temperature distribution of the Methane-Air premixed flame was measured. In order to enhance the measurement accuracy of the CT-TDLAS (Computed tomography-tunable diode laser absorption spectroscopy), the SMART (simultaneous multiplica...
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Kai-Henning Tybussek, Kevin Kolpatzeck, Fahd Faridi, Sascha Preu and Jan C. Balzer
THz time-domain spectroscopy (TDS) is a promising tool for quality control purposes in industrial applications, but the high cost and the relatively large laser sources still make it difficult to use the full potential of the technology for a decent pric...
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Marko Hübner, Ingo Will, Jörg Körner, Jürgen Reiter, Mathias Lenski, Johannes Tümmler, Joachim Hein, Bernd Eppich, Arnim Ginolas and Paul Crump
The latest generation of high-energy-class pulsed laser facilities, under construction or planned, such as EuPRAXIA, require reliable pump sources with high power (many kW), brightness (>1 MW/cm2/sr) and electro-optical conversion efficiency (>50%). Thes...
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Yu Ding, Tongyu Liu and Mengmeng Yan
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Wei Wang, Zhipeng Yan and Zaiyuan Wang
An online measurement method with a measurement cell to estimate internal parameters (small-signal gain coefficient, internal optical losses, the saturation parameter, and transmittance of the output mirror) has potential to be used in the production, ma...
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Paolo Caccianiga, Saverio Ceraulo, Gérard Rey, Dario Monai, Marco Baldoni and Gianluigi Caccianiga
Introduction: Within the field of periodontology, there has been a proposal for the utilization of noninvasive laser therapy as a potential treatment for persistent periodontitis. The Laser-Assisted New Attachment Procedure (LANAP) employs an Nd:YAG lase...
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Abraham Lopez, Haley N. Strong, Kendra I. McGlothen, Dustin J. Hines and R. Jacob Baker
A pulse generator using an avalanche transistor operating in current-mode second breakdown driving a 780 nm laser diode is reported. The laser diode is mounted on the skull of a mouse and used in transcranial infrared light stimulation (TILS) experiments...
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Aneta Bartkowska, Dariusz Bartkowski, Damian Przestacki, Jakub Hajkowski and Andrzej Miklaszewski
The paper presents study results focused on the microstructural, mechanical, and physicochemical properties of B-Cr coatings obtained by means of modification of diffusion borochromized layers by diode laser beam. The studies were conducted on 145Cr6 too...
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Kong Zhang, Jun He and Junmin Wang
We report the preparation of a 780.2 nm and 852.3 nm laser device based on single-pass periodically poled magnesium-oxide-doped lithium niobate (PPMgO:LN) bulk crystals and diode-laser-seeded fiber amplifiers. First, a single-frequency continuously tunab...
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Yi-Chin Fang, Yih-Fong Tzeng, Chan-Chuan Wen, Chao-Hsien Chen, Hsiao-Yi Lee, Shun-Hsyung Chang and Yi-Lun Su
In the field of vehicle lighting, due to the diode laser, its small size and high energy conversion efficiency, it can be effectively used as the headlight source of high beam. In recent years, it was adopted by European advanced car manufacturers as a n...
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Laura Di Sieno, Alberto Dalla Mora, Alessandro Torricelli, Lorenzo Spinelli, Rebecca Re, Antonio Pifferi and Davide Contini
In this paper, a time-domain fast gated near-infrared spectroscopy system is presented. The system is composed of a fiber-based laser providing two pulsed sources and two fast gated detectors. The system is characterized on phantoms and was tested in viv...
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Dismas K. Choge, Huai-Xi Chen, Yi-Bin Xu, Lei Guo, Guang-Wei Li and Wan-Guo Liang
We demonstrate a compact blue and orange-two color continuous wave laser source emitting at 487 nm and from 597.4 to 600.3 nm, respectively. The temperature tunable coherent orange radiation is achieved by frequency mixing 974 nm laser diode (LD) and a C...
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