Experimental study demonstrates femtosecond laser inscription of long-period gratings in Panda fiber, suggesting utility for high-power lasers and sensors.
The method of femtosecond laser inscription by slit-apertured beam is applied for fabrication of long-period fiber gratings in polarization-maintaining Panda-type fiber. Polarization properties as well as ambient refractive index sensitivity are investigated for the inscribed gratings. It is shown that the method allows us to create high-quality element for the use as spectral filter of high-power fiber laser as well as high-temperature sensor.
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Wolf et al. (2015) studied this question.
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