The Optimization of Multimode Fiber Speckle Sensor for Microvibration

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Material</td><td class="align_center">Diameter (<i>μ</i>m)</td><td class="align_center">NA</td><td class="align_center">Length (m)</td><td class="align_center">Maximum number of modes</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Silica</td><td class="align_center">50</td><td class="align_center">0.22</td><td class="align_center">1</td><td class="align_center"><span style="width: 52.8087ptpx;"><svg height="11.9413pt" id="M21" style="vertical-align:-0.3499002pt" version="1.1" viewbox="-0.0498162 -11.5914 52.8087 11.9413" width="52.8087pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 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transform="matrix(.013,0,0,-0.013,41.366,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,47.653,-5.741)"><path d="M290 377C321 398 342 415 358 430C378 450 389 473 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z"></path></g></svg></span></td></tr><tr><td class="align_left">Silica</td><td class="align_center">62.5</td><td class="align_center">0.22</td><td class="align_center">1</td><td class="align_center"><span style="width: 52.8087ptpx;"><svg height="11.9413pt" 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515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z"></path></g></svg></span></td></tr><tr><td class="align_left">Silica</td><td class="align_center">105</td><td class="align_center">0.22</td><td class="align_center">1</td><td class="align_center"><span style="width: 52.8087ptpx;"><svg height="11.9413pt" id="M23" style="vertical-align:-0.3499002pt" version="1.1" viewbox="-0.0498162 -11.5914 52.8087 11.9413" width="52.8087pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M137 343C167 482 260 545 321 574C357 591 397 603 429 609L423 641C382 634 335 622 295 608C189 570 37 457 37 238C37 84 125 -12 242 -12C362 -12 447 89 447 209C447 311 374 393 267 393C247 393 226 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341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z"></path></g></svg></span></td></tr><tr><td class="align_left">Silica</td><td class="align_center">200</td><td class="align_center">0.22</td><td class="align_center">1</td><td class="align_center"><span style="width: 52.8087ptpx;"><svg height="11.9413pt" id="M24" style="vertical-align:-0.3499002pt" version="1.1" viewbox="-0.0498162 -11.5914 52.8087 11.9413" width="52.8087pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M412 140C382 77 369 73 315 73H129L270 222C362 320 402 379 402 466C402 571 322 635 234 635C177 635 130 609 99 576L42 495L64 475C90 514 133 568 201 568C274 568 318 519 318 435C318 349 255 267 193 193C144 135 87 78 32 23V0H405C417 45 427 89 440 131L412 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<div>Type of fibers selected in the experiment.</div>

International Journal of Optics

tab1

Table 1

Table 1: The Optimization of Multimode Fiber Speckle Sensor for Microvibration 