US 11,788,956 B2
Terahertz spectrum measurement system and method for analyzing a terahertz spectrum of a substance
Hua Li, Shanghai (CN); Ziping Li, Shanghai (CN); Wenjian Wan, Shanghai (CN); and Juncheng Cao, Shanghai (CN)
Assigned to Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai (CN)
Appl. No. 17/603,524
Filed by Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai (CN)
PCT Filed Sep. 30, 2019, PCT No. PCT/CN2019/109380
§ 371(c)(1), (2) Date Oct. 13, 2021,
PCT Pub. No. WO2020/220577, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 201910350476.0 (CN), filed on Apr. 28, 2019.
Prior Publication US 2022/0221400 A1, Jul. 14, 2022
Int. Cl. G01N 21/3581 (2014.01); G01N 21/01 (2006.01); H01S 5/042 (2006.01); H01S 5/34 (2006.01); G01N 21/39 (2006.01)
CPC G01N 21/3581 (2013.01) [G01N 21/01 (2013.01); H01S 5/042 (2013.01); H01S 5/3402 (2013.01); G01N 2021/0112 (2013.01); G01N 2021/396 (2013.01); G01N 2201/06113 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A terahertz spectrum measurement system, comprising:
two terahertz quantum cascade lasers with their emission ports arranged oppositely;
a vacuum hood, which is arranged between emission ports of two terahertz quantum cascade laser devices;
radio frequency sources, each of which is connected said terahertz quantum cascade laser to provide a high-frequency RF signal for said terahertz quantum cascade laser;
DC sources, each of which is connected to said terahertz quantum cascade laser to provide a DC bias for said terahertz quantum cascade laser; and
T-type bias tees, each of which is arranged among said RF source, said DC source and said terahertz quantum cascade laser for injecting said high-frequency RF signal and said DC bias into aid terahertz quantum cascade laser;
wherein numbers of said RF sources, said DC sources and said T-type bias tees are each two, and each terahertz quantum cascade laser is correspondingly connected with a T-type bias tee, and RF source and a DC source.