Apparatus and method for measuring concentration of pollutants in water
US10502681B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 14, 2019 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Mar 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06791
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure provides an apparatus and a method for measuring a concentration of pollutants in water. A passive Q-switched fiber laser outputs an evanescent wave to a to-be-tested water sample after emitting a Q-switched pulse laser signal and transmitting it via an evanescent field fiber, and based on an evanescent wave change caused by an absorption effect of the pollutants in the to-be-tested water sample to the evanescent wave and an output repetition frequency change of the passive Q-switched fiber laser due to the evanescent wave change, outputs an output repetition frequency result of the passive Q-switched fiber laser. The method is simple; and the apparatus based on the method is simple in structure and low in cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.