Details
| Original language | English |
|---|---|
| Title of host publication | Fiber Lasers XXI |
| Subtitle of host publication | Technology and Systems |
| Editors | Clemence Jollivet |
| Publisher | SPIE |
| Number of pages | 6 |
| ISBN (electronic) | 9781510669895 |
| Publication status | Published - 12 Mar 2024 |
| Event | Fiber Lasers XXI: Technology and Systems 2024 - San Francisco, United States Duration: 29 Jan 2024 → 1 Feb 2024 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 12865 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
The output power of single-frequency fiber amplifiers is usually limited by nonlinear effects such as stimulated Brillouin scattering (SBS). To obtain higher power thresholds for the onset of unwanted nonlinear effects, the mode area of the fibers in use needs to be increased. Specialty fibers can provide larger mode areas and thus push the current power limits of single-frequency fiber amplifiers while maintaining single-mode beam quality as required by next generation gravitational wave detectors. Fibers with a large core diameter, depressed cladding around the core and a confined doping (DCCD-fiber) inside the core are by now commercially available and address the need for large mode area fibers while maintaining single-mode operation. The depressed cladding leads to a smaller effective refractive index difference for higher order modes (HOM) in comparison to the fundamental mode which results in a significant increase of bending losses for the HOM. The confined doping results in a selective gain increase for the fundamental mode. Here, we present a forward pumped single-frequency amplifier based on an Yb3+-doped DCCD fiber. With this fiber, an output power of 400W was achieved with a slope efficiency of 75 %, and a PER of 15dB. The amplifier showed no signs of SBS or parasitic lasing of the amplified spontaneous emission. This work will evaluate the potential of the used DCCD fiber in the context of next generation gravitational wave detector lasers.
Keywords
- confined doping, depressed cladding, fiber amplifier, gravitational waves, single frequency
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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Fiber Lasers XXI: Technology and Systems. ed. / Clemence Jollivet. SPIE, 2024. 1286513 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12865).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - High-power single-frequency depressed-cladding, confined-doping Yb3+ fiber amplifier
AU - Kruska, Kristopher
AU - Booker, Phillip
AU - Weßels, Peter
AU - Neumann, Jörg
AU - Kracht, Dietmar
N1 - Funding Information: Partly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC-2123 QuantumFrontiers – 390837967.
PY - 2024/3/12
Y1 - 2024/3/12
N2 - The output power of single-frequency fiber amplifiers is usually limited by nonlinear effects such as stimulated Brillouin scattering (SBS). To obtain higher power thresholds for the onset of unwanted nonlinear effects, the mode area of the fibers in use needs to be increased. Specialty fibers can provide larger mode areas and thus push the current power limits of single-frequency fiber amplifiers while maintaining single-mode beam quality as required by next generation gravitational wave detectors. Fibers with a large core diameter, depressed cladding around the core and a confined doping (DCCD-fiber) inside the core are by now commercially available and address the need for large mode area fibers while maintaining single-mode operation. The depressed cladding leads to a smaller effective refractive index difference for higher order modes (HOM) in comparison to the fundamental mode which results in a significant increase of bending losses for the HOM. The confined doping results in a selective gain increase for the fundamental mode. Here, we present a forward pumped single-frequency amplifier based on an Yb3+-doped DCCD fiber. With this fiber, an output power of 400W was achieved with a slope efficiency of 75 %, and a PER of 15dB. The amplifier showed no signs of SBS or parasitic lasing of the amplified spontaneous emission. This work will evaluate the potential of the used DCCD fiber in the context of next generation gravitational wave detector lasers.
AB - The output power of single-frequency fiber amplifiers is usually limited by nonlinear effects such as stimulated Brillouin scattering (SBS). To obtain higher power thresholds for the onset of unwanted nonlinear effects, the mode area of the fibers in use needs to be increased. Specialty fibers can provide larger mode areas and thus push the current power limits of single-frequency fiber amplifiers while maintaining single-mode beam quality as required by next generation gravitational wave detectors. Fibers with a large core diameter, depressed cladding around the core and a confined doping (DCCD-fiber) inside the core are by now commercially available and address the need for large mode area fibers while maintaining single-mode operation. The depressed cladding leads to a smaller effective refractive index difference for higher order modes (HOM) in comparison to the fundamental mode which results in a significant increase of bending losses for the HOM. The confined doping results in a selective gain increase for the fundamental mode. Here, we present a forward pumped single-frequency amplifier based on an Yb3+-doped DCCD fiber. With this fiber, an output power of 400W was achieved with a slope efficiency of 75 %, and a PER of 15dB. The amplifier showed no signs of SBS or parasitic lasing of the amplified spontaneous emission. This work will evaluate the potential of the used DCCD fiber in the context of next generation gravitational wave detector lasers.
KW - confined doping
KW - depressed cladding
KW - fiber amplifier
KW - gravitational waves
KW - single frequency
UR - http://www.scopus.com/inward/record.url?scp=85190674842&partnerID=8YFLogxK
U2 - 10.1117/12.3001458
DO - 10.1117/12.3001458
M3 - Conference contribution
AN - SCOPUS:85190674842
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Fiber Lasers XXI
A2 - Jollivet, Clemence
PB - SPIE
T2 - Fiber Lasers XXI: Technology and Systems 2024
Y2 - 29 January 2024 through 1 February 2024
ER -