Acta Photonica Sinica, Volume. 49, Issue 3, 0314003(2020)
Passive Q-switched Cylindrical Vector Beam Fiber Laser Based on Few Mode Fiber
A mode converter is prepared through fusion taper coupling a single mode fiber and a few mode fiber, and then a multi-walled carbon nanotube film is used as a saturable absorber to cover the cone of the converter to form a saturable absorber cylindrical vector optical device. Combined the advantages of Q-switched fiber laser and mode conversion device, the pulse cylindrical vector beam can be generated simply and efficiently, and a pulsed high-order mode laser output with high peak power and high mode purity can be obtained. The experiment successfully achieves a stable Q-switched pulse output with a center wavelength of 1 560 nm, a maximum single pulse energy and a maximum peak power of 116 nJ and 57 mW, respectively. The output of the Q-switched laser with radially and azimuthally polarized beams can be achieved by adjusting the polarization controller in the optical path.
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Cheng-xin WANG, Bao-le LU, Min LUO, Hao-wei CHEN, Jin-tao BAI. Passive Q-switched Cylindrical Vector Beam Fiber Laser Based on Few Mode Fiber[J]. Acta Photonica Sinica, 2020, 49(3): 0314003
Category: Lasers and Laser Optic
Received: Nov. 28, 2019
Accepted: Dec. 23, 2019
Published Online: Apr. 24, 2020
The Author Email: CHEN Hao-wei (67892020@qq.com)