Abstract
We explored high-energy and high-peak-power pulse generation in large-core multimode fiber amplifiers, achieving what is to our knowledge the highest reported energies, up to 82 mJ for 500-ns pulses, 27 mJ for 50-ns pulses, and 2.4-MW peak power for 4-ns pulses at 1064 nm, using 200-μm-diameter and 0.062-N.A. core Yb-doped double-clad fiber amplifiers. The highly multimode nature of the fiber core was mitigated by use of a coiling-induced mode-filtering effect to yield a significant improvement in output-beam quality from M2 = 25 from an uncoiled fiber to M2 = 6.5 from a properly coiled fiber, with the corresponding reduction in number of propagating transverse modes from ≥200 to ≤20.
| Original language | English |
|---|---|
| Pages (from-to) | 358-360 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2005 Feb 15 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-μm core highly multimode Yb-doped fiber amplifiers. / Cheng, Ming Yuan; Chang, Yu Chung; Galvanauskas, Almantas; Mamidipudi, Pri; Changkakoti, Rupak; Gatchell, Peter.
In: Optics Letters, Vol. 30, No. 4, 15.02.2005, p. 358-360.Research output: Contribution to journal › Article
TY - JOUR
T1 - High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-μm core highly multimode Yb-doped fiber amplifiers
AU - Cheng, Ming Yuan
AU - Chang, Yu Chung
AU - Galvanauskas, Almantas
AU - Mamidipudi, Pri
AU - Changkakoti, Rupak
AU - Gatchell, Peter
PY - 2005/2/15
Y1 - 2005/2/15
N2 - We explored high-energy and high-peak-power pulse generation in large-core multimode fiber amplifiers, achieving what is to our knowledge the highest reported energies, up to 82 mJ for 500-ns pulses, 27 mJ for 50-ns pulses, and 2.4-MW peak power for 4-ns pulses at 1064 nm, using 200-μm-diameter and 0.062-N.A. core Yb-doped double-clad fiber amplifiers. The highly multimode nature of the fiber core was mitigated by use of a coiling-induced mode-filtering effect to yield a significant improvement in output-beam quality from M2 = 25 from an uncoiled fiber to M2 = 6.5 from a properly coiled fiber, with the corresponding reduction in number of propagating transverse modes from ≥200 to ≤20.
AB - We explored high-energy and high-peak-power pulse generation in large-core multimode fiber amplifiers, achieving what is to our knowledge the highest reported energies, up to 82 mJ for 500-ns pulses, 27 mJ for 50-ns pulses, and 2.4-MW peak power for 4-ns pulses at 1064 nm, using 200-μm-diameter and 0.062-N.A. core Yb-doped double-clad fiber amplifiers. The highly multimode nature of the fiber core was mitigated by use of a coiling-induced mode-filtering effect to yield a significant improvement in output-beam quality from M2 = 25 from an uncoiled fiber to M2 = 6.5 from a properly coiled fiber, with the corresponding reduction in number of propagating transverse modes from ≥200 to ≤20.
UR - http://www.scopus.com/inward/record.url?scp=14544299589&partnerID=8YFLogxK
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U2 - 10.1364/OL.30.000358
DO - 10.1364/OL.30.000358
M3 - Article
C2 - 15762427
AN - SCOPUS:14544299589
VL - 30
SP - 358
EP - 360
JO - Optics Letters
JF - Optics Letters
SN - 0146-9592
IS - 4
ER -