Ryser, M.; Pilz, S.; Burn, A.; Romano, V. (2012). Multi-stage ytterbium fiber-amplifier seeded by a gain-switched laser diode. ALT Proceedings, 1(1) Bern Open Publishing 10.12684/alt.1.101
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We demonstrated all-fiber amplification of 11 ps pulses from a gain-switched laser diode at 1064 nm. The diode was driven at a repetition rate of 40 MHz and delivered 13 µW of fiber-coupled average output power. For the low output pulse energy of 325 fJ we have designed a multi-stage core pumped pre-amplifier in order to keep the contribution of undesired amplified spontaneous emission as low as possible. By using a novel time-domain approach for determining the power spectral density ratio (PSD) of signal to noise, we identified the optimal working point for our pre-amplifier. After the pre-amplifier we reduced the 40 MHz repetition rate to 1 MHz using a fiber coupled pulse-picker. The final amplification was done with a cladding pumped Yb-doped large mode area fiber and a subsequent Yb-doped rod-type fiber. With our setup we reached a total gain of 73 dB, resulting in pulse energies of >5.6 µJ and peak powers of >0.5 MW. The average PSD-ratio of signal to noise we determined to be 18/1 at the output of the final amplification stage.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Applied Physics |
UniBE Contributor: |
Ryser, Manuel, Burn, Andy, Romano, Valerio |
Subjects: |
600 Technology > 620 Engineering |
ISSN: |
2296-312X |
Publisher: |
Bern Open Publishing |
Language: |
English |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:43 |
Last Modified: |
05 Dec 2022 14:13 |
Publisher DOI: |
10.12684/alt.1.101 |
BORIS DOI: |
10.7892/boris.17927 |
URI: |
https://boris.unibe.ch/id/eprint/17927 (FactScience: 225764) |
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