Femtosecond pulse generation using stimulated Raman scattering in integrated silicon optical waveguide device |
| |
Authors: | Jianwei Wu Fengguang Luo Mingcui Cao |
| |
Institution: | (1) Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China;(2) Wuhan National Laboratory for Optoelectronics, Wuhan, 430074, P.R. China |
| |
Abstract: | To generate ultrafast femtosecond optical pulses, we propose a model of an integrated device consisting of a Mach-Zehnder
interferometer (MZI) with two symmetric 3 dB directional couplers and a straight waveguide based on the single-mode silicon-on-insulator
(SOI) optical waveguide. The principle of pulse generation in the presented device is based on the strong stimulated Raman
scattering (SRS) in silicon; the center wavelength of the pulse generated is tunable by changing the center wavelength of
the co-propagating pump pulse. Numerical results show that, when a continuous wave (CW) with a weak power at 1670 nm wavelength
and a pump pulse with a high peak power at 1550 nm wavelength are co-propagating, a narrow femtosecond pulse with a pulse
width (full width at half maximum, FWHM) of ∼60 fs (FWHM of the pump pulse is 166.5 fs) can be achieved in the device proposed.
In addition, when the waveguide length, pump peak power, and pump-pulse width are fixed, the properties of generated femtosecond
pulse depend strongly on the incident chirp of the pump pulse and the CW power. |
| |
Keywords: | integrated optics silicon-on-insulator technology stimulated Raman scattering femtosecond pulse generation |
本文献已被 SpringerLink 等数据库收录! |
|