发明名称 |
Time delay compensation for optical waveguides using a bidirectional wavelength scan |
摘要 |
Methods and apparatus for accurately determining wavelength by compensating a time delay using a bidirectional wavelength scan are provided. One example method generally includes introducing first wavelength-swept light into an optical waveguide according to a first sweep function having a first wavelength sweep direction; interrogating one or more optical elements, having characteristic wavelengths, with the first wavelength-swept light to produce a first set of optical signals, wherein the optical elements are disposed along the optical waveguide; introducing second wavelength-swept light into the optical waveguide according to a second sweep function having a second wavelength sweep direction, wherein the second wavelength sweep direction is opposite the first wavelength sweep direction; interrogating the optical elements with the second wavelength-swept light to produce a second set of optical signals; and determining a parameter associated with at least one of the optical elements based on the first and second sets of optical signals. |
申请公布号 |
US9046389(B2) |
申请公布日期 |
2015.06.02 |
申请号 |
US201314076766 |
申请日期 |
2013.11.11 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
Taverner Domino;Wang Zhuang |
分类号 |
G02B6/34;G01D5/353;G01L1/24;G01K11/32;G02B6/293 |
主分类号 |
G02B6/34 |
代理机构 |
Patterson & Sheridan, LLP |
代理人 |
Patterson & Sheridan, LLP |
主权项 |
1. A method for optical interrogation, comprising:
introducing first wavelength-swept light into an optical waveguide according to a first sweep function having a first wavelength sweep direction; interrogating one or more optical elements, having characteristic wavelengths, with the first wavelength-swept light to produce a first set of optical signals, wherein the optical elements are disposed along the optical waveguide; introducing second wavelength-swept light into the optical waveguide according to a second sweep function having a second wavelength sweep direction, wherein the second wavelength sweep direction proceeds from relatively longer wavelengths to shorter wavelengths and is opposite the first wavelength sweep direction; interrogating the one or more optical elements with the second wavelength-swept light to produce a second set of optical signals; and determining a parameter associated with at least one of the optical elements based on the first and second sets of optical signals. |
地址 |
Houston TX US |