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Experimental Investigation of thermal lensing in End-pumped Nd∶YVO4 Crystal Using a New Simple Approach

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Chinese Journal of Lasers 1999年第2期8卷 8-13页

作者： LIU Junhai LU Jianren LU Junhua SHAO Zongshu JIANG Minhua (National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China) 山东大学晶体材料国家重点实验室山东济南 250100 山东大学晶体材料国家重点实验室山东济南

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１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｈｉｇｈｐｏｗｅｒｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓ，ｐｕｍｐｉｎｄｕｃｅｄｔｈｅｒｍａｌｆｏｃｕｓｉｎｇｉｓｏｆｐｒｉｍａｒｙｉｍｐｏｒｔａｎｃｅｂｅｃａｕｓｅｏｆｉｔｓｓｉｇｎｉｆｉｃａｎｔｉｎｆｌｕｅｎｃｅｓｏ...

关键词： thermal lensing thermal focal length Nd∶YVO 4 crystal resonator stability

thermal lensing, Laser Performance at 1.06 μm and 0.53 μm of a NYAB Laser End pumped by a Diode laser array

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Chinese Journal of Lasers 2001年第1期 2-6页

作者： LIU Junhai WANG Jiyang SUN Lianke SHAO Zongshu JIANG Minhua (National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China) Received Jan. 24, 2000 Revised manuscript received Apr. 27, 2000

The thermal lensing, output characteristics of an end pumped NYAB laser with high pump power levels and operated at the fundamental wavelength , and the manner of self frequency doubling, have been investigated. The thermal lensing in the NYAB crystal was found to be significantly stronger than that in Nd∶YVO 4 crystal. A maximum output of 3 2 W at 1 06 μm was achieved with an optical conversion efficiency of 29 1% and an average slope efficiency of 37 5%. These results were found to be slightly inferior to those of Nd∶YVO 4 crystal. When operated in the fashion of self frequency doubling, 23 mW green output was obtained at the incident pump power of 5 W, such inefficient operation was attributed to the large mode size in the NYAB crystal.

关键词： NYAB laser thermal lensing end pumped self frequency doubling

Brillouin Lasing with a Reduced Self-Pulsing Characteristic Using a Short-Length Erbium-Doped Fiber as the Nonlinear Gain Medium

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Chinese Physics Letters 2014年第5期31卷 61-64页

作者： A. Zarei R. Z. R. R. Rosdin N. M. All H. Ahmad S. W. Harun Department of Electrical Engineering University of Malaya Kuala Lumpur 50603 Malaysia Photonics Research Centre University of Malaya Kuala Lumpur 50603 Malaysia

A single-wavelength Brillouin laser is demonstrated by using a 3-m-long erbium doped fiber （EDF） in a ring cavity. The EDF is used to provide both nonlinear and linear gains to generate a stimulated Brillouin scattering （SBS） and to amplify the generated SBS, respectively. The Brillouin erbium fiber laser （BEFL） operates at 1561.5 nm, where the operating wavelength is up-shifted by 0.08nm from the Brillouin pump. The operation wavelength is also tunable within 1560.6-1562.6nm. The BEFL Mso shows a self-pulsing characteristic with repetition of 66. 7kHz when the BP is set around the threshold pump power of 13roW. Compared to the conventional Brillouin fiber laser with a long cavity length, the proposed BEFL exhibits a significantly lower amplitude of pulse. This laser has many potential applications, such as in optical communication and sensors.

关键词： BRILLOUIN scattering thermal lensing DOPPLER effect WAVELENGTH division multiplexing TUNABLE lasers

Efficient 15-W CW Nd:YVO4 Solid-state Laser Single-end-pumped by a Fiber-coupled Diode-laser-array

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Chinese Journal of Lasers 1999年第5期8卷 3-5页

作者： LIU Junhai LU Junhua LI Guangming SHAO Zongshu JIANG Minhua(National Laboratory of Crystal Materials,Shandong University, Jinan 250100, China) 山东大学晶体材料国家重点实验室山东济南 250100 山东大学晶体材料国家重点实验室山东济南

A dedes-laser-array single-end-pumped CW Nd: YVO4 laser, capable of preducing max0imum TEM00 mode output power of 15 W, has been demonstrated. At the incident pumping power of 24 W, the output power of 13. 8 W was obtained, leading to an optical converson effciency of 57. 5%, and the slope efficiency of 66. 7%. It is shown that only with Nd: YVO4 crystals of low Nd3+ concentration, the laser can be operated efficiently under high pump power levels.

关键词： diode-laser-array end-pumped high-power Nd:YVO4 laser thermal lensing