High power broadband all fiber superfluorescent source with linear polarization and near diffraction-limited beam quality

作者：Ma, Pengfei; Huang, Long; Wang, Xiaolin; Zhou, Pu^*; Liu, Zejin

来源：Optics Express, 2016, 24(2): 1082-1088.

DOI：10.1364/OE.24.001082

In this manuscript, a high power broadband superfluorescent source (SFS) with linear polarization and near-diffraction-limited beam quality is achieved based on an ytterbium-doped (Yb-doped), all fiberized and polarization-maintained master oscillator power amplifier (MOPA) configuration. The MOPA structure generates a linearly polarized output power of 1427 W with a slope efficiency of 80% and a full width at half maximum (FWHM) of 11 nm, which is power scaled by an order of magnitude compared with the previously reported SFSs with linear polarization. In the experiment, both the polarization extinction ratio (PER) and beam quality (M-2 factor) are degraded little during the power scaling process. At maximal output power, the PER and M-2 factor are measured to be 19.1dB and 1.14, respectively. The root-mean-square (RMS) and peakvale (PV) values of the power fluctuation at maximal output power are just 0.48% and within 3%, respectively. Further power scaling of the whole system is limited by the available pump sources. To the best of our knowledge, this is the first demonstration of kilowatt level broadband SFS with linear polarization and near-diffraction-limited beam quality.

• 出版日期2016-1-25
• 单位中国人民解放军国防科学技术大学