Institute of Electrical and Electronics Engineers Inc.;Piscataway: IEEE
摘要:
摘要： The broadband parasitic amplification in a diode-seeded nanosecond ytterbium-doped fiber laser amplifier system is numerically and experimentally investigated. The amplification is originated from a weak and pulsed parasitic signal associated with the 1064-nm seed diode laser. Although the average power of the parasitic pulse is less than 5% of the total seed laser power, a significant transient spike is observed during the amplification. In agreement with the simulation, nonlinear effects caused by the transient spike limits the scaling of signal peak power in fiber preamplifiers. With the utilization of a narrow bandwidth filter to eliminate the parasitic pulse, the power and energy scalability of a multistage diode-seeded fiber amplifier laser system has been significantly improved. At 1064 nm, pulses with the peak power of 120 kW and energy of 1.2 mJ have been successfully generated in the multistage \hbox{Yb}^{3+} -doped fiber amplifier with an energy gain of 63 dB and 56% conversion efficiency. In viewing of the parasitic pulse's 8.8-nm bandwidth, it has the potential to become a novel seed source for high-peak-power fiber amplifiers. 其他題名： JPHOT 出版者： Piscataway: IEEE 出版日期： 2014-06-01 出處： IEEE photonics journal, 2014-06, Vol.6 (3), p.1-8 資源來源： DOAJ Directory of Open Access Journals 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Jun 2014 識別號： ISSN: 1943-0655 識別號： ISSN: 1943-0647 識別號： EISSN: 1943-0647 識別號： DOI: 10.1109/JPHOT.2014.2319090 識別號： CODEN: PJHOC3
