Broadband mid-infrared pulse via intra-pulse difference frequency generation based on supercontinuum from multiple thin plates<xref rid="cpb_28_11_114203_fn1" ref-type="fn">*</xref><fn id="cpb_28_11_114203_fn1"><label>*</label><p>Project supported by the National Key R&D Program of China (Grant No. 2017YFB0405202), the Major Program of the National Natural Science Foundation of China (Grant No. 61690221), the Key Program of the National Natural Science Foundation of China (Grant No. 11434016), and the National Natural Science Foundation of China (Grant Nos. 11574384 and 11674386).</p></fn>

Broadband mid-infrared pulse via intra-pulse difference frequency generation based on supercontinuum from multiple thin plates**

Project supported by the National Key R&D Program of China (Grant No. 2017YFB0405202), the Major Program of the National Natural Science Foundation of China (Grant No. 61690221), the Key Program of the National Natural Science Foundation of China (Grant No. 11434016), and the National Natural Science Foundation of China (Grant Nos. 11574384 and 11674386).

Huang Hang-Dong^{1, 2}, Hu Chen-Yang^{2, 3}, He Hui-Jun^{2, 3}, Teng Hao², Li Zhi-Yuan⁴, Zhao Kun^{2, †}, Wei Zhi-Yi^{2, 3, ‡}

(a) Solid line: SCG after seven fused silica plates; dashed line: spectrum of Ti: sapphire CPA. Inset: the output beam profile taken before the collimating mirror. (b) Transform-limited pulse duration of 7.1 fs from the SCG.