A practical topological insulator saturable absorber for mode-locked fiber laser

作者：Yan, Peiguang; Lin, Rongyong; Ruan, Shuangchen^*; Liu, Aijiang; Chen, Hao; Zheng, Yuequn; Chen, Sifan; Guo, Chunyu; Hu, Juguang

来源：Scientific Reports, 2015, 5(1): 8690.

DOI：10.1038/srep08690

A novel saturable absorber (SA) was fabricated by coating the topological insulator (TI) film on microfiber using pulsed laser deposition (PLD) method. The TISA device had an insertion loss of similar to 1.25 dB, a saturable intensity of 26.7 MW/cm(2), a modulation depth of similar to 5.7%, and a nonsaturable loss of 20.5%. Upon employing this SA device, we established a passively mode-locked EDFL and achieved nearly free-chirped soliton pulse with 286 fs of pulse duration and >73 dB of signal to noise ratio (SNR). This result clearly evidences that the PLD is an effective scheme for practical SA device fabrication.

• 出版日期2015-3-3
• 单位深圳大学