US 11,870,210 B2
Transverse mode switchable all-fiber high-order mode Brillouin laser
Jiulin Gan, Guangzhou (CN); Xiaobo Heng, Guangzhou (CN); Zhongmin Yang, Guangzhou (CN); and Zhishen Zhang, Guangzhou (CN)
Assigned to South China University of Technology, Guangzhou (CN)
Appl. No. 15/734,648
Filed by South China University of Technology, Guangzhou (CN)
PCT Filed Oct. 16, 2018, PCT No. PCT/CN2018/110443
§ 371(c)(1), (2) Date Dec. 3, 2020,
PCT Pub. No. WO2019/233012, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 201810569311.8 (CN), filed on Jun. 5, 2018.
Prior Publication US 2021/0234330 A1, Jul. 29, 2021
Int. Cl. H01S 3/30 (2006.01); H01S 3/067 (2006.01); H01S 3/0804 (2023.01); H01S 3/094 (2006.01); H01S 3/10 (2006.01); H01S 3/08 (2023.01); H01S 3/0941 (2006.01)
CPC H01S 3/302 (2013.01) [H01S 3/06754 (2013.01); H01S 3/06791 (2013.01); H01S 3/0804 (2013.01); H01S 3/094003 (2013.01); H01S 3/1001 (2019.08); H01S 3/1003 (2013.01); H01S 3/08013 (2013.01); H01S 3/09415 (2013.01); H01S 3/094065 (2013.01); H01S 3/10061 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A transverse mode switchable all-fiber high-order mode Brillouin laser, characterized in that: the laser comprises a narrow linewidth pump laser, an optical amplifier, a 1×N optical switch (N≥2), a fiber mode selection coupler group, a first polarization controller, a fiber circulator, a fiber coupler, a second polarization controller, and a few-mode fiber;
the 1×N optical switch comprises one input port and N output ports;
the fiber mode selection coupler group comprises N fiber mode selection couplers, which are respectively denoted as a first fiber mode selection coupler to an Nth fiber mode selection coupler; each of the N fiber mode selection couplers comprises a first port, a second port, a third port, and a fourth port; the fourth port of the N−1th fiber mode selection coupler is connected to the third port of the Nth fiber mode selection coupler;
the fiber circulator comprises a first port, a second port, and a third port;
the fiber coupler comprises a first port, a second port, a third port, and a fourth port;
the narrow linewidth pump laser is connected to the optical amplifier, which is connected to the input port of the 1×N optical switch; the N output ports of the 1×N optical switch are respectively connected to the first ports of the N fiber mode selection couplers; the fourth port of the Nth fiber mode selection coupler is connected to the first port of the fiber circulator through the first polarization controller; the second port of the fiber circulator is connected to the first port of the fiber coupler; the second port of the fiber coupler is connected to the third port of the fiber circulator through the second polarization controller and the few-mode fiber to form a ring cavity; and the third port of the fiber coupler outputs laser beams.