DocumentCode :
844099
Title :
Parametric Raman wavelength conversion in scaled silicon waveguides
Author :
Raghunathan, Varun ; Claps, Ricardo ; Dimitropoulos, Dimitrios ; Jalali, Bahram
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Volume :
23
Issue :
6
fYear :
2005
fDate :
6/1/2005 12:00:00 AM
Firstpage :
2094
Lastpage :
2102
Abstract :
The benefits of using submicrometer modal-dimension silicon waveguides in realizing high-efficiency parametric Raman wavelength conversion are demonstrated theoretically and experimentally. The combined effects of Raman nonlinearities and free-carrier losses induced by two-photon absorption (TPA) are analyzed using the coupled-mode theory. The analysis indicates that scaling down the lateral dimensions increases the conversion efficiency of the Raman process and reduces the effective lifetime of free carriers and hence ameliorates the free-carrier losses. The feasibility of data conversion is demonstrated by coherent transfer of the analog radio-frequency (RF) signal from Stokes to anti-Stokes channels. The conversion efficiency, and hence signal-to-noise ratio (SNR), and bandwidth of the conversion process are found to be limited by the phase mismatch between the pump, Stokes, and anti-Stokes fields. The dispersion properties of submicrometer waveguides are also studied from the point of view of achieving phase matching and enhancing the conversion efficiency.
Keywords :
carrier lifetime; coupled mode analysis; elemental semiconductors; integrated optics; optical dispersion; optical losses; optical noise; optical phase matching; optical pumping; optical waveguide theory; optical wavelength conversion; silicon; stimulated Raman scattering; two-photon processes; Raman nonlinearities; Si; Stokes channels; analog radio-frequency signal; antiStokes channels; conversion efficiency; coupled-mode theory; dispersion; free carriers lifetime; free-carrier losses; parametric Raman wavelength conversion; phase mismatch; submicrometer modal-dimension silicon waveguides; two-photon absorption; Absorption; Bandwidth; Couplings; Data conversion; Frequency conversion; RF signals; Radio frequency; Signal to noise ratio; Silicon; Waveguide theory; Integrated optics; Raman scattering; nonlinear optics; silicon-on-insulator (SOI); wavelength conversion;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2005.849895
Filename :
1440517
Link To Document :
بازگشت