The Bragg grating may be a slanted grating.
A second optical Bragg grating (20) having a respective Bragg wavelength (μ2) is provided for each first Bragg grating (10) and optically coupled to said first grating (10).
The force has a component that is transversal to the Bragg grating and effects a change in strain of the Bragg grating and thereby a change in an optical period of the Bragg grating.
Preferably, the variable grating is an electrically switchable Bragg grating.
The grating structures preferably form a Bragg grating.
Two anchoring means (A1 ...
The apparatus comprises an optical fibre portion comprising a Bragg grating and an element for reducing an impact of an external force that is transversal to the Bragg grating.
The second Bragg grating is a Chirped Bragg grating (5) whose central wavelength is stabilised in relation to temperature changes.
The package includes a fiber segment (16) including a Bragg grating (22).
A Bragg network extensometer and a method for the production of said extensometer.
A fiber Bragg grating device and a flow cell device are also provided.
This leads to an electrically controlled tuning of the Bragg grating.
In one embodiment, the apparatus includes a switchable Bragg grating.
The present invention discloses a fiber Bragg grating sensor system.
The method is to use sampled Bragg grating structure, that is, the grating in the DFB semiconductor laser is a sampled Bragg grating.
The tunable dispersion compensating fiber Bragg grating and the tunable fiber filter Bragg grating may be configured to be tuned by a single actuator.
The wavelength band of light entering the optical fiber (10) for a sensor includes the Bragg wavelength of the temperature assurance FBG (20) and the temperature measurement FBG (30).
The moveable wall portion is coupled to the Bragg grating so that the movement of the moveable wall portion causes a force on a side of the Bragg grating.
A broadband amplifier may be a broadband laser, Bragg grating, a fiber Bragg grating, a Raman amplifier, a Brillouin amplifier, or combinations thereof.
First and second fibre Bragg gratings have a respective Bragg wavelength and the fibre Bragg gratings are irradiated with primary light.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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