US 12,442,700 B2
Multi-wavelength laser for synchronously monitoring temperature and pressure of ocean
Ying Shang, Jinan (CN); Jiasheng Ni, Jinan (CN); Chen Wang, Jinan (CN); Qian Guo, Jinan (CN); Zhiqiang Song, Jinan (CN); Wenan Zhao, Jinan (CN); Sheng Huang, Jinan (CN); Chang Li, Jinan (CN); Bing Cao, Jinan (CN); and Lei Lv, Jinan (CN)
Assigned to Laser Institute Of Shandong Academy Of Science, Shandong (CN)
Appl. No. 18/019,451
Filed by LASER INSTITUTE OF SHANDONG ACADEMY OF SCIENCE, Shandong (CN)
PCT Filed Jul. 6, 2020, PCT No. PCT/CN2020/100403
§ 371(c)(1), (2) Date Feb. 2, 2023,
PCT Pub. No. WO2022/006701, PCT Pub. Date Jan. 13, 2022.
Prior Publication US 2023/0288272 A1, Sep. 14, 2023
Int. Cl. G01L 1/24 (2006.01); G01K 11/3206 (2021.01)
CPC G01L 1/246 (2013.01) [G01K 11/3206 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A multi-wavelength laser for synchronously monitoring temperature and pressure of an ocean, comprising a broadband laser source, a pulse controller and a phase shifted fiber bragg grating unit,
wherein the broadband laser source is configured to output broadband laser;
the pulse controller is configured to convert the broadband laser output by the broadband laser source into broadband pulsed light; and
the phase shifted fiber bragg grating unit is configured to demodulate a plurality of pulsed light arranged by a time sequence and having different wavelengths from the broadband pulsed light,
wherein the laser further comprises a first wavelength division multiplexer,
wherein a first port of the first wavelength division multiplexer is connected to an output end of the pulse controller, a second port of the first wavelength division multiplexer is connected to the phase shifted fiber bragg grating unit, and a third port of the first wavelength division multiplexer is configured to output the plurality of pulsed light arranged by the time sequence and having different wavelengths; and
wherein the phase shifted fiber bragg grating unit comprises one optical fiber, and multiple reflective phase shifted fiber bragg gratings having different central window wavelengths are arranged on the optical fiber.