Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth
Single-crystal fibers are an intermediate between laser crystals and doped glass fibers. They have the advantages of both guiding laser light and matching the efficiencies found in bulk crystals, which is making them ideal candidates for high-power laser and fiber laser applications. This work focus...
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doaj-836843ba2c5346db90e80507edb4d2922020-11-24T23:16:17ZengMDPI AGCrystals2073-43522017-01-01711210.3390/cryst7010012cryst7010012Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal GrowthGisele Maxwell0Bennett Ponting1Eminet Gebremichael2Ruben Magana3Shasta Crystals Inc., 1750 Cesar Chavez, Unit J, San Francisco, CA 94124, USAShasta Crystals Inc., 1750 Cesar Chavez, Unit J, San Francisco, CA 94124, USAShasta Crystals Inc., 1750 Cesar Chavez, Unit J, San Francisco, CA 94124, USAShasta Crystals Inc., 1750 Cesar Chavez, Unit J, San Francisco, CA 94124, USASingle-crystal fibers are an intermediate between laser crystals and doped glass fibers. They have the advantages of both guiding laser light and matching the efficiencies found in bulk crystals, which is making them ideal candidates for high-power laser and fiber laser applications. This work focuses on the growth of a flexible fiber with a core of dopant (Er, Nd, Yb, etc.) and a polycrystalline clad of yttrium aluminum garnet (YAG) that will exhibit good wave guiding properties. Direct growth or a combination of growth and cladding experiments are described. Scattering loss measurements at visible wavelengths, along with dopant profile characterization with damage threshold results, are also presented. For single-pass amplification, a single-pass linear gain of 7.4 was obtained for 29 nJ pulses of 5 ns duration at 1 MHz repetition rate. We also obtained a laser efficiency of over 58% in a diode-pumped configuration. These results confirm the potential for single-crystal fibers to overcome the limitations of the glass fibers commonly used in fiber lasers, making them prime candidates for high-power compact fiber lasers and amplifiers.http://www.mdpi.com/2073-4352/7/1/12single-crystal fiberlaser heated pedestal growthYAGlaseramplifiersol-gel |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gisele Maxwell Bennett Ponting Eminet Gebremichael Ruben Magana |
spellingShingle |
Gisele Maxwell Bennett Ponting Eminet Gebremichael Ruben Magana Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth Crystals single-crystal fiber laser heated pedestal growth YAG laser amplifier sol-gel |
author_facet |
Gisele Maxwell Bennett Ponting Eminet Gebremichael Ruben Magana |
author_sort |
Gisele Maxwell |
title |
Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth |
title_short |
Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth |
title_full |
Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth |
title_fullStr |
Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth |
title_full_unstemmed |
Advances in Single-Crystal Fibers and Thin Rods Grown by Laser Heated Pedestal Growth |
title_sort |
advances in single-crystal fibers and thin rods grown by laser heated pedestal growth |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2017-01-01 |
description |
Single-crystal fibers are an intermediate between laser crystals and doped glass fibers. They have the advantages of both guiding laser light and matching the efficiencies found in bulk crystals, which is making them ideal candidates for high-power laser and fiber laser applications. This work focuses on the growth of a flexible fiber with a core of dopant (Er, Nd, Yb, etc.) and a polycrystalline clad of yttrium aluminum garnet (YAG) that will exhibit good wave guiding properties. Direct growth or a combination of growth and cladding experiments are described. Scattering loss measurements at visible wavelengths, along with dopant profile characterization with damage threshold results, are also presented. For single-pass amplification, a single-pass linear gain of 7.4 was obtained for 29 nJ pulses of 5 ns duration at 1 MHz repetition rate. We also obtained a laser efficiency of over 58% in a diode-pumped configuration. These results confirm the potential for single-crystal fibers to overcome the limitations of the glass fibers commonly used in fiber lasers, making them prime candidates for high-power compact fiber lasers and amplifiers. |
topic |
single-crystal fiber laser heated pedestal growth YAG laser amplifier sol-gel |
url |
http://www.mdpi.com/2073-4352/7/1/12 |
work_keys_str_mv |
AT giselemaxwell advancesinsinglecrystalfibersandthinrodsgrownbylaserheatedpedestalgrowth AT bennettponting advancesinsinglecrystalfibersandthinrodsgrownbylaserheatedpedestalgrowth AT eminetgebremichael advancesinsinglecrystalfibersandthinrodsgrownbylaserheatedpedestalgrowth AT rubenmagana advancesinsinglecrystalfibersandthinrodsgrownbylaserheatedpedestalgrowth |
_version_ |
1725587729069113344 |