Generation of broadband cascaded FWM products,supercontinuum and femtosecond wavelength conversion in SOI waveguide[邀请报告]

【作者】 刘红军； Jin Wen； Zhaolu Wang； Nan Huang； Qibing Sun；

【Author】 Hongjun Liu,Jin Wen,Zhaolu Wang,Nan Huang,Qibing Sun (State Key Laboratory of Transient Optics and Photonics technology,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Science(CAS),Xi’an,710119)

【机构】 State Key Laboratory of Transient Optics and Photonics technology,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Science(CAS)；

【摘要】 <正>In recent years,silicon photonics has become a rapidly growing area.The nonlinear effects in silicon-on-insulator(SOI) waveguides are attracting attention because of the large values of the Kerr parameter and the tight confinement of the optical mode,which can be used to develop different highly integrated multifunctional devices that perform both optical and electrical operations on a single low-cost chip,such as laser,amplifier,modulator,wavelength converter,and optical parametric oscillator.In this paper,the generation of the broadband cascaded four-wave-mixing(FWM) products,frequency comb, supercontinuum and femtosecond pulse wavelength conversion in the SOI waveguide has been investigated. Firstly,the two degenerate pump waves are launched to near the zero dispersion wavelength of the SOI waveguide in order to realize the phase matching condition.The bandwidth of the cascaded FWM covers more than 1200 nm,which extends from C-band to IR-band with the products of the cascaded FWM using just a few millimetres.Secondly,we propose a practical method to broaden the bandwidth of super continuum generated in silicon-on-insulator(SOI) waveguide by controlling the initial chirp of inputting femtosecond pulses,which has the main impact on the initial stage of the spectral broadening caused by the self-phase modulation(SPM) effect.The results show that the bandwidth and flatness of the supercontinuum generated in SOI waveguide are sensitive to the initial chirp of inputting femtosecond pulses,the supercontinuum bandwidth can be remarkably enhanced by inputting positive chirp femtosecond pulses with a decreased propagation distance required by soliton fission,and the maximum bandwidth of supercontinuum can be increased to 1500 nm.Finally,the femtosecond pulse wavelength conversion with the conversion bandwidth from 1400 nm to 1700 nm in the telecommunication bands via four-wave mixing in a 1.5-mm-long silicon rib waveguide is also demonstrated.更多还原

【Abstract】 In recent years,silicon photonics has become a rapidly growing area.The nonlinear effects in silicon-on-insulator(SOI) waveguides are attracting attention because of the large values of the Kerr parameter and the tight confinement of the optical mode,which can be used to develop different highly integrated multifunctional devices that perform both optical and electrical operations on a single low-cost chip,such as laser,amplifier,modulator,wavelength converter,and optical parametric oscillator.In this paper,the generation of the broadband cascaded four-wave-mixing(FWM) products,frequency comb, supercontinuum and femtosecond pulse wavelength conversion in the SOI waveguide has been investigated. Firstly,the two degenerate pump waves are launched to near the zero dispersion wavelength of the SOI waveguide in order to realize the phase matching condition.The bandwidth of the cascaded FWM covers more than 1200 nm,which extends from C-band to IR-band with the products of the cascaded FWM using just a few millimetres.Secondly,we propose a practical method to broaden the bandwidth of super continuum generated in silicon-on-insulator(SOI) waveguide by controlling the initial chirp of inputting femtosecond pulses,which has the main impact on the initial stage of the spectral broadening caused by the self-phase modulation(SPM) effect.The results show that the bandwidth and flatness of the supercontinuum generated in SOI waveguide are sensitive to the initial chirp of inputting femtosecond pulses,the supercontinuum bandwidth can be remarkably enhanced by inputting positive chirp femtosecond pulses with a decreased propagation distance required by soliton fission,and the maximum bandwidth of supercontinuum can be increased to 1500 nm.Finally,the femtosecond pulse wavelength conversion with the conversion bandwidth from 1400 nm to 1700 nm in the telecommunication bands via four-wave mixing in a 1.5-mm-long silicon rib waveguide is also demonstrated.更多还原