Author Affiliations
Abstract
1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2 State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073, China
3 Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China
We report here a single-pass 1.56 μm fiber gas Raman laser in a deuterium-filled hollow-core fiber and a 2.86 μm cascade fiber gas Raman laser with methane in the second stage. The maximum output powers at 1.56 and 2.86 μm are 27 and 8.5 mW with Raman conversion efficiency of 30% and 42%, respectively. The results offer a new method to produce a 1.5 μm fiber source and prove the potential of the cascade fiber gas Raman laser in extending the available wavelength.
140.3280 Laser amplifiers 140.3510 Lasers, fiber 140.3550 Lasers, Raman 140.4130 Molecular gas lasers Chinese Optics Letters
2019, 17(7): 071406
Author Affiliations
Abstract
College of Applied Sciences, Beijing University of Technology, Beijing, 100124, PR China
We experimentally demonstrate a cascaded Raman scattering continuum, utilizing a compact mode-locked Yb-doped fiber laser based on a nonlinear polarization rotation technique in the all normal dispersion regime. There is no physical filter or polarization controller in the oscillator, and a different mode-locked operation is achieved, corresponding to the extra fiber location in the oscillator. The broadband spectrum generation owes to the enhanced stimulated Raman scattering progress. The maximum output average power and peak power are 14.75 nJ and 18.0 W, and the short coherence light is suited for optical coherence tomography.
140.3510 Lasers, fiber 140.3550 Lasers, Raman 140.4050 Mode-locked lasers Chinese Optics Letters
2017, 15(7): 071408
Author Affiliations
Abstract
1 Leibniz Institute of Photonic Technology, Albert Einstein Straße 9, Jena 07745, Germany
2 Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University, Jena 07743, Germany
3 University Heart Center Freiburg, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, Germany
The biochemical composition of atherosclerotic plaques is closely related to plaque stability and, therefore, to the associated risk of plaque evolution and rupture. Combinations of current imaging modalities, such as optical coherence tomography (OCT) with spectroscopic methods, therefore offer the possibility of concurrently obtaining morphological as well as chemical information. Raman spectroscopy is one of the most promising techniques that can be combined with intravascular imaging modalities. A microscopy setup merging both techniques has been applied to characterize plaque depositions of a human aorta affected by the disease. Calcified depositions were clearly identified and subsequently confirmed by histopathology.
140.3550 Lasers, Raman Chinese Optics Letters
2017, 15(9): 090008
Author Affiliations
Abstract
Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
We demonstrate wavelength-selectable visible emissions from a miniature crystalline laser that combines the stimulated Raman scattering (SRS) effect in an Nd:YVO4 crystal with intracavity frequency mixing in an angle-tuned beta barium borate (BBO) crystal. The presented laser is operating on demand at any one of three wavelengths in the green-yellow spectral region. Up to 600, 560, and 200 mW output powers at 559, 532, and 588 nm, respectively, are obtained from the continuous wave (CW) laser having a 18 mm long resonator and a 3.8 W laser diode end pumping. The pump threshold for each visible wavelength is less than 0.4 W.
140.3550 Lasers, Raman 190.2620 Harmonic generation and mixing 140.3380 Laser materials Chinese Optics Letters
2016, 14(2): 021404
Author Affiliations
Abstract
1 School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
2 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 University of Chinese Academy of Science, Beijing 100190, China
A 1.88 μm Ba(NO3)2-based stimulated Raman scattering (SRS) laser pumped by a potassium-titanyl-phosphate-based optical parametric oscillator (OPO) laser is presented. Under the pumping energy of a 130 mJ 1064 nm Q-switched Nd:YAG laser, a 40 mJ 1.57 μm laser is achieved; the maximum output energy of the 1.88 μm Raman laser reaches 7.5 mJ with a pulse duration of 5.3 ns at repetition rates of 10 Hz, and the corresponding total optical conversion efficiency is about 5.8%. The combination of the SRS and OPO techniques significantly extends the wavelength from 1.064 to 1.57 μm (OPO) and then demonstrates Stokes-shifting to 1.88 μm (SRS).
140.3550 Lasers, Raman 140.3538 Lasers, pulsed 190.5650 Raman effect 190.4970 Parametric oscillators and amplifiers Chinese Optics Letters
2016, 14(11): 111401
Xiaohua Xie 1,2,3Yongqin Yu 2,3,4Yufeng Zhang 1,2,3Dong Wang 1,2,3Chenlin Du 1,2,3
Author Affiliations
Abstract
1 College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China
2 Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, China
3 Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Shenzhen University, Shenzhen 518060, China
4 College of Physics Science and Technology, Shenzhen University, Shenzhen 518060, China
We report a diode-end-pumped Q-switched YVO4/Nd:YVO4/YVO4 self-Raman second-Stokes laser at the wavelength of 1764 nm. With the incident pump power of 32 W and the pulse repetition frequency of 20 kHz, the maximal average output power at 1764 nm is up to 1.18 W, with the corresponding optical conversion efficiency of 3.69%. The highest pulse energy and peak power are 59 mJ and 31.7 kW, respectively.
140.3550 Lasers, Raman 140.3540 Lasers, Q-switched 140.3480 Lasers, diode-pumped 140.3580 Lasers, solid-state 140.3530 Lasers, neodymium Chinese Optics Letters
2014, 12(s2): S21405
Author Affiliations
Abstract
An all-fiber linearly polarized Raman fiber laser at 1 120 nm is demonstrated. With a 1 070-nm linearly polarized Yb-doped fiber laser as pump source, an output of up to 7.7 W at 1 120 nm is obtained with an optical efficiency of 55%. The polarization extinction ratio of the linearly polarized Raman fiber is higher than 18 dB. A numerical simulation model is developed to determine the Raman coefficient of the gain fiber and to evaluate the laser performance. The spectral isolation between the Raman fiber laser and the pump fiber laser is determined to be necessary for further improvements of performance.
140.3510 Lasers, fiber 140.3550 Lasers, Raman 060.3510 Lasers, fiber Chinese Optics Letters
2012, 10(2): 021406
Author Affiliations
Abstract
1 Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
We obtain high peak power pulses in megawatt range of the first (1181 nm), second (1321 nm), and third order (1500 nm) Stokes radiation from self-conversion of the 1067-nm laser radiation based on Nd:KGW laser. The maximum output energy of the first order Stokes laser is 35.3 mJ, which is to our knowledge, the highest reported energy in an intracavity Q-switched laser. The third order Stokes pulse is obtained in an intracavity Q-switched laser.
固体拉曼激光器 受激拉曼散射 140.3550 Lasers, Raman 140.3580 Lasers, solid-state Chinese Optics Letters
2010, 8(3): 293
Author Affiliations
Abstract
Department of Electronic Engineering, Xiamen University, Xiamen 361005
A highly efficient cascaded P-doped Raman fiber laser (RFL) pumped by a 1064-nm continuous wave (CW) Nd:YVO3 solid-state laser is reported. 1.15-W CW output power at 1484 nm is obtained while the input pump power is 4 W, corresponding to the power conversion efficiency of 28.8%. The threshold pump power for the second-order Stokes radiation is 1.13 W. The slope efficiency is as high as 42.6%. The experimental results are in good agreement with theoretical ones. Furthermore, the power instability of the P-doped RFL at 1484 nm in an hour is observed to be less than 5%.
级联掺磷拉曼光纤激光器 掺钕钒酸钇激光器 1484 nm 1064 nm 140.0140 Lasers and laser optics 140.3550 Lasers, Raman 140.3580 Lasers, solid-state Chinese Optics Letters
2008, 6(1): 0141
Author Affiliations
Abstract
Centre for Optical and Electromagnetic Research, Joint Research Centre of Optical Communications, Zhejiang University, Hangzhou 310058
A stable and uniform multi-wavelength fiber laser based on the hybrid gain of a dispersion compensating fiber as the Raman gain medium and an erbium-doped fiber (EDF) is introduced. The gain competition effects in the fiber Raman amplification (FRA) and EDF amplification are analyzed and compared experimentally. The FRA gain mechanism can suppress the gain competition effectively and make the present multi-wavelength laser stable at room temperature. The hybrid gain medium can also increase the lasing bandwidth compared with a pure EDF laser, and improve the power conversion efficiency compared with a pure fiber Raman laser.
光纤激光器 多波长 拉曼 掺铒光纤 Sagnac环形滤波器 140.3510 Lasers, fiber 060.2410 Fibers, erbium 140.3500 Lasers, erbium 140.3550 Lasers, Raman Chinese Optics Letters
2006, 4(11): 652
