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1 kHz single-frequency, injection-seeded Er:YAG laser with an optical feedback

Chinese Optics Letters 2019年第3期17卷 50-54页

作者： Yixuan Zhang Chunqing Gao Qing Wang Quanxin Na Meng Zhang Mingwei Gao Shuai Huang School of Optics and Photonics Beijing Institute of Technology

A novel 1 kHz single-frequency, Q-switched Er-doped yttrium aluminum garnet(Er:YAG) laser pumped by a 1470 nm laser diode is demonstrated. The 500 ns, 5.52 mJ single-frequency, diffraction-limited pulses are obtained by using a ‘ramp-fire' injection-seeding technique and an optical feedback architecture. The full width at half-maximum of the pulse spectrum is measured to be 1.47 MHz by using the heterodyne technique. The beam quality M2 factors are measured to be 1.18 and 1.24 in the x and y directions, respectively.

关键词： 1 kHz single-frequency injection-seeded Er:YAG laser optical feedback

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A 3-kHz Er:YAG single-frequency laser with a‘triple-reflection’configuration on a piezoelectric actuator

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Chinese Physics B 2020年第8期29卷 281-285页

作者： Shuai Huang Qing Wang Meng Zhang Chaoyong Chen Kaixin Wang Mingwei Gao Chunqing Gao School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Information Technology Ministry of Industry and Information TechnologyBeijing Institute of TechnologyBeijing 100081China

A novel Er:YAG laser system operating at 1645 nm with high pulse-repetition-frequency(PRF)of kHz level is demonstrated.A ring cavity with double gain medium end-pumped by two fiber lasers is utilized to obtain high pulse energy.A novel‘triple-reflection’configuration on a piezoelectric actuator(PZT)is adopted to achieve high-repetition-rate at 3-kHz operation with the ramp-fire locking *** frequency pulses with maximum average power of 18.3 W at 3 kHz are obtained,and the pulse duration time is 318 *** full line width at half maximum(FWHM)of the pulses measured by the heterodyne technique is 1.71 MHz at 3 *** the best of our knowledge,this is the highest PRF single-frequency laser pulses achieved based Er:YAG gain medium.

关键词： Er:YAG injection-seeded single-frequency high pulse-repetition-frequency

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Incoherent pulse Doppler lidar as the velocimeter system

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Chinese Science Bulletin 2002年第6期47卷 523-528页

作者： Zhishen Liu Xiaoquan Song Jintao Liu Kailin Zhang Ocean Univ Qingdao Ocean Remote Sensing Inst Key Lab Ocean Remote Sensing Minist Educ Qingdao 266003 Peoples R China

This note reports a new type of incoherent pulse laser Doppler lidar velocimeter with iodine molecular filter as a frequency discriminator. Its transmitter subsystem applies a Nd:YAG pulse laser which is injected with a single longitudinal-mode diode pumped continuous seeder laser. The field experiment proved that this velocimeter measurement results are consistent with those measured by photoelectric velocimeter. Measurements of eight different velocities show that the standard deviation is 0.56m/s, the range resolution is 3.75m.

关键词： Doppler lidar injection-seeded laser iodine fllter range finder by laser velocity measurement by laser.

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