Ultrashort Long-Period Fiber Grating Sensors Inscribed on a Single Mode Fiber Using <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-4.1996pt" id="M1" height="15.6076pt" version="1.1" viewBox="-0.0657574 -11.408 31.7722 15.6076" width="31.7722pt"><g transform="matrix(.017,0,0,-0.017,0,0)"><path id="g187-68" d="M625 186C574 85 512 32 429 32C293 32 194 153 194 337C194 485 274 621 419 621C496 621 573 586 606 468L643 475C636 537 629 583 620 638C593 644 519 665 438 665C199 665 42 523 42 317C42 158 152 -15 418 -15C486 -15 578 5 604 11C621 46 647 122 660 171L625 186Z"/></g><g transform="matrix(.017,0,0,-0.017,11.79,0)"><path id="g187-80" d="M394 664C165 664 42 495 42 323C42 132 181 -15 381 -15C570 -15 725 116 725 332C725 529 576 664 394 664ZM374 622C491 622 571 503 571 304C571 120 494 27 399 27C271 27 196 171 196 343C196 516 274 622 374 622Z"/></g><g transform="matrix(.012,0,0,-0.012,25.027,4.134)"><path id="g187-243" d="M442 172C405 109 393 108 333 108H171L289 222C383 315 430 374 430 457C430 569 349 635 249 635C187 635 134 610 97 573L34 478L61 455C93 502 136 542 196 542C265 542 300 491 300 422C300 346 261 273 191 190C142 132 84 76 31 25V0H432C443 42 455 105 471 163L442 172Z"/></g></svg> Laser Radiation

<div>Example of the peak attenuation with the change in the refractive index of the medium (water with a variable percentage of ethylene glycol), for a grating with 2.4 mm length.</div>

Journal of Sensors

fig8

Figure 8

Figure 8: Ultrashort Long-Period Fiber Grating Sensors Inscribed on a Single Mode Fiber Using <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-4.1996pt" id="M1" height="15.6076pt" version="1.1" viewBox="-0.0657574 -11.408 31.7722 15.6076" width="31.7722pt"><g transform="matrix(.017,0,0,-0.017,0,0)"><path id="g187-68" d="M625 186C574 85 512 32 429 32C293 32 194 153 194 337C194 485 274 621 419 621C496 621 573 586 606 468L643 475C636 537 629 583 620 638C593 644 519 665 438 665C199 665 42 523 42 317C42 158 152 -15 418 -15C486 -15 578 5 604 11C621 46 647 122 660 171L625 186Z"/></g><g transform="matrix(.017,0,0,-0.017,11.79,0)"><path id="g187-80" d="M394 664C165 664 42 495 42 323C42 132 181 -15 381 -15C570 -15 725 116 725 332C725 529 576 664 394 664ZM374 622C491 622 571 503 571 304C571 120 494 27 399 27C271 27 196 171 196 343C196 516 274 622 374 622Z"/></g><g transform="matrix(.012,0,0,-0.012,25.027,4.134)"><path id="g187-243" d="M442 172C405 109 393 108 333 108H171L289 222C383 315 430 374 430 457C430 569 349 635 249 635C187 635 134 610 97 573L34 478L61 455C93 502 136 542 196 542C265 542 300 491 300 422C300 346 261 273 191 190C142 132 84 76 31 25V0H432C443 42 455 105 471 163L442 172Z"/></g></svg> Laser Radiation 

Journal of Sensors

Ultrashort Long-Period Fiber Grating Sensors Inscribed on a Single Mode Fiber Using Laser Radiation

Figure 8