US 11,719,629 B2
Non-linear optical pumping detection apparatus and non-linear optical absorption cross-section measurement method
Zhiqiang Zhou, Zhenjiang (CN); Jiawei Cong, Zhenjiang (CN); Yanqun Tong, Zhenjiang (CN); Mingyang Chen, Zhenjiang (CN); Liu Lv, Zhenjiang (CN); Yonghong Fu, Zhenjiang (CN); and Naifei Ren, Zhenjiang (CN)
Assigned to JIANGSU UNIVERSITY, Zhenjiang (CN)
Appl. No. 17/781,003
Filed by JIANGSU UNIVERSITY, Zhenjiang (CN)
PCT Filed Jan. 27, 2021, PCT No. PCT/CN2021/073912
§ 371(c)(1), (2) Date May 30, 2022,
PCT Pub. No. WO2021/169713, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202010127302.0 (CN), filed on Feb. 28, 2020; application No. 202010127319.6 (CN), filed on Feb. 28, 2020; and application No. 202010127320.9 (CN), filed on Feb. 28, 2020.
Prior Publication US 2022/0412882 A1, Dec. 29, 2022
Int. Cl. G01N 21/359 (2014.01); G02B 5/00 (2006.01); G02B 17/02 (2006.01); G02B 17/06 (2006.01); G02B 19/00 (2006.01); G02B 27/14 (2006.01); G02B 5/20 (2006.01)
CPC G01N 21/359 (2013.01) [G02B 5/005 (2013.01); G02B 17/023 (2013.01); G02B 17/0668 (2013.01); G02B 19/0014 (2013.01); G02B 27/144 (2013.01); G02B 27/145 (2013.01); G01N 2201/0636 (2013.01); G01N 2201/06113 (2013.01); G02B 5/205 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A non-linear optical pumping detection apparatus, comprising a main light path, a non-degenerate detection system, a non-degenerate excitation system, a degenerate detection system, and a reference system, wherein
the main light path sequentially comprises a laser, a first aperture diaphragm, a chopper, a first polarizer, a second polarizer, a first reflector, and a first laser beam splitter;
the non-degenerate detection system sequentially comprises a second reflector, a first adjustable attenuator, a first converging lens, a heavy water tank, a second pinhole diaphragm, a neutral filter, a second converging lens, a second laser beam splitter, a third converging lens, a sample to be measured, and a first optical signal collection system; the first optical signal collection system is connected to an optical multichannel analyzer through a first optical fiber, and the optical multichannel analyzer is connected to a computer;
the non-degenerate excitation system sequentially comprises a second adjustable attenuator, a third reflector, a fourth reflector, a fifth reflector, a sixth reflector, a seventh reflector, an eighth reflector, a ninth reflector, a fourth converging lens, the sample, and an optical power meter; the laser passing through the third converging lens and the laser passing through the fourth converging lens are superposed at an angle 5 to 15 degrees in the sample;
the degenerate detection system sequentially comprises a third laser beam splitter, a triple prism, a fifth converging lens, the sample, and a second optical signal collection system; the second optical signal collection system is connected to the optical multichannel analyzer through a second optical fiber, and the optical multichannel analyzer is connected to the computer;
the reference system sequentially comprises a tenth reflector, the sample, and a third optical signal collection system; the third optical signal collection system is connected to the optical multichannel analyzer through a third optical fiber, and the optical multichannel analyzer is connected to the computer.