Numerical investigation on frequency-shifting-induced spectral compression of femtosecond solitons in highly nonlinear fiber

作者：Li, S N; Li, H P^*; Liao, J K; Tang, X G; Lu, R G; Liu, Y

来源：Optik, 2013, 124(16): 2281-2284.

DOI：10.1016/j.ijleo.2012.06.086

• Ultrashort pulse
• Soliton self-frequency shift
• Spectral compression
• Third-order dispersion
• Pulse chirp

We present a numerical investigation on nonlinear propagation of femtosecond pulses in anomalously dispersive highly nonlinear fiber (HNLF) with positive third-order dispersion (TOD). Soliton self-frequency shift (SSFS) in the HNLF is shown to enable efficient spectral compression of ultrashort pulse whose parameters satisfy 0.8 <= N <= 1.3 for the soliton order N. A spectral-compression factor up to 2.5 can be achieved for 60-fs, 1550-nm fundamental solitons red-shifted to 1609 nm in the HNLF. We show that the fiber TOD has significant influence on the SSFS-induced spectral-compression performance. Using HNLF with larger TOO parameter, greater spectral-compression factor can be obtained. We also find that the impact of initial pulse chirp on output spectral width is negligible, indicating SSFS-based spectral-compression method is efficient for both chirped pulses and transform-limited pulses.

• 出版日期2013
• 单位电子科技大学