US 12,276,837 B2
Double-parameter in-situ sensor based on waveguide grating, a sensing system and a preparation method
Jiandong Bai, Shanxi (CN); Xinyu Zhao, Shanxi (CN); Xiaoyu Gao, Shanxi (CN); Yongqiu Zheng, Shanxi (CN); and Chenyang Xue, Shanxi (CN)
Filed by North University of China, Shanxi (CN)
Filed on Jun. 21, 2023, as Appl. No. 18/338,720.
Claims priority of application No. 202210764173.5 (CN), filed on Jul. 1, 2022.
Prior Publication US 2024/0003715 A1, Jan. 4, 2024
Int. Cl. G02B 6/124 (2006.01); G02B 6/02 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/124 (2013.01) [G02B 6/02123 (2013.01); G02B 2006/12138 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A double-parameter in-situ sensor based on waveguide grating, comprising an optical waveguide substrate (4), wherein a first straight optical waveguide (5) and a second straight optical waveguide (9) are arranged in the optical waveguide substrate (4) in parallel, two ends of the first straight optical waveguide (5) are respectively connected with a first transmission fiber (3) and a second transmission fiber (7), two ends of the second straight optical waveguide (9) are respectively connected with a third transmission fiber (8) and a fourth transmission fiber (13), a first Bragg grating (6) is arranged on the first straight optical waveguide (5), a second Bragg grating (10) and a third Bragg grating (12) are separately arranged on the second straight optical waveguide (9), a micro air groove (11) is arranged on the upper surface of the optical waveguide substrate (4), and is positioned between the second Bragg grating (10) and the third Bragg grating (12).