Fiber facet gratings for high power fiber lasers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F17%3A00485692" target="_blank" >RIV/67985882:_____/17:00485692 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/17:00367508
Result on the web
<a href="http://dx.doi.org/10.1117/12.2293605" target="_blank" >http://dx.doi.org/10.1117/12.2293605</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2293605" target="_blank" >10.1117/12.2293605</a>

Result language
angličtina
Original language name
Fiber facet gratings for high power fiber lasers
Original language description
We numerically investigated the properties of diffraction gratings designated for fabrication on the facet of an optical fiber. The gratings are intended to be used in high-power fiber lasers as mirrors either with a low or high reflectivity. The modal reflectance of low reflectivity polarizing grating has a value close to 3% for TE mode while it is significantly suppressed for TM mode. Such a grating can be fabricated on laser output fiber facet. The polarizing grating with high modal reflectance is designed as a leaky-mode resonant diffraction grating. The grating can be etched in a thin layer of high index dielectric which is sputtered on fiber facet. We used refractive index of Ta2O5 for such a layer. We found that modal reflectance can be close to 0.95 for TE polarization and polarization extinction ratio achieves 18 dB. Rigorous coupled wave analysis was used for fast optimization of grating parameters while aperiodic rigorous coupled wave analysis, Fourier modal method and finite difference time domain method were compared and used to compute modal reflectance of designed gratings
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of SPIE - The International Society for Optical Engineering 2017
ISBN
978-1-5106-1702-5
ISSN
0277-786X
e-ISSN
—
Number of pages
6
Pages from-to
—
Publisher name
SPIE: The Society of Photo-Optical Instrumentation Engineers
Place of publication
Bellingham
Event location
Prague
Event date
Aug 28, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000425429900018

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