Device for digitizing optical signal and device for measuring temperature and elongation
A technology of optical signals and signals, applied to thermometers with analog-to-digital converters, optical devices to transmit sensing components, thermometers with physical/chemical changes, etc.
Pending Publication Date: 2022-06-07
NKT PHOTONICS
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Problems solved by technology
However, the problem here is to separate the influence of the two measured variables temperature and extension
On the other hand, effects such as polarization attenuation produce additional changes in the signal level which must also be covered by the dynamic range of the detector
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[0052] Identical or functionally identical components are assigned the same reference numerals in the various figures. The dashed connecting lines represent light signals, which are preferably guided in the light guide. Solid connecting lines represent electrical signal lines.
[0053] of the apparatus 10 for digitizing an optical signal figure 1 The embodiment shown in includes a photodetector 1 which, for example, receives a high-frequency, amplitude-modulated optical signal and generates a photocurrent.
[0054] The device 10 further comprises one or more amplifiers 2 which are designed as transimpedance amplifiers. Amplifier 2 is optional and can also be omitted. The at least one amplifier 2 amplifies the electrical signal generated by the photodetector 1 and converts the current into a voltage here.
[0055] It is entirely possible to integrate an amplifier in the form of a transimpedance amplifier into the photodetector 1 . In this case, the photocurrent in the pho...
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The invention relates to a device for digitizing a light signal, comprising: a light detector, which is designed to detect a light signal and to generate an electrical signal corresponding to the light signal; an envelope detector configured to determine an amplitude of an electrical signal generated by the light detector and to output an electrical signal corresponding to the amplitude; an analog-to-digital converter configured to digitize the electrical signal output by the envelope detector and to output corresponding data; the invention relates to a device for calibrating an envelope detector, comprising an envelope detector, a variable voltage source comprising an output which is connected or connectable to an input of the envelope detector, said device being designed to calibrate the envelope detector by means of the variable voltage source. The invention further relates to a method for digitizing an optical signal, to a device for spatially resolved measurement of temperature and elongation by means of Brillouin scattering, and to a method for spatially resolved measurement of temperature and elongation by means of Brillouin scattering.
Description
technical field [0001] The invention relates to a device and a method for digitizing an optical signal and to a device according to the preamble of claim 12 for spatially resolved temperature and elongation measurement by means of Brillouin scattering and a method for spatially resolved temperature and elongation measurement by means of Brillouin scattering according to the preamble of claim 13 . Background technique [0002] From EP 3 139 133 A1 a device and a method of the above-mentioned type for spatially resolved temperature and elongation measurement by means of Brillouin scattering are known. In the device described here, a laser beam emitted by a laser source is in-coupled into an optical fiber for measurement. The Brillouin signal generated by the laser beam in the optical fiber is outcoupled based on Brillouin scattering. An optical polarization beam splitter splits the out-coupled Brillouin signal into two components with mutually different polarizations, wherei...
Claims
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Login to View More IPC IPC(8): G01D5/353G01K11/322
CPCG01D5/35364G01K11/322G01K2219/00G01K15/005G01L1/242G01J3/44H03M1/12
Inventor W·希尔A·拉特B·马克斯T·约斯特迈尔
Owner NKT PHOTONICS