期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 51, 期 5, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2015.2415525
关键词
Cascaded quadratic nonlinearity; spectral broadening; spectral shifts; femtosecond pulses; periodically poled lithium niobate
资金
- China Post-Doctoral Science Foundation [2013M541173]
- Basic Operational Outlays for the Research Activities of Centric University [ZXH2012N005]
- National Natural Science Foundation of China [11004152]
Characteristics of spectral shift and spectrum broadening of femtosecond pulses propagation in periodically poled lithium niobate via cascaded quadratic nonlinearity are investigated. Amount of spectral broadening is obtained analytically from coupled equations including Kerr-like term. Multipeak spectra with the typical self-phase-modulation-like characteristics were obtained experimentally using 40-fs pulses with a spectral width of 60 nm at 1550-nm band. The spectral blue and red shifts as large as 50 nm were observed with a large phase mismatching Delta k = 95 mm(-1). The simulated spectra confirmed the experimental measurement.
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