NDLI: Lasing Directionality and Polarization Behavior in Continuous-Wave Ring Raman Lasers Based on Micro- and Nano-Scale Silicon Waveguides

Content Provider	IEEE Xplore Digital Library
Author	Vermeulen, N.
Copyright Year	1983
Abstract	A generic model is introduced to describe the lasing characteristics of continuous-wave circular and racetrack-shaped ring Raman lasers based on micro- and nano-scale silicon waveguides. This model explicitly takes into account the effective Raman gain values for forward and backward lasing in the ring resonator, the presence of a bus waveguide in which the Stokes laser radiation coupled out from the ring undergoes additional Raman amplification, and the spatial gain variations for different polarization states in the ring structure. I show numerically that ring lasers based on micro-scale waveguides generate unidirectional lasing in either the forward or backward direction because of an asymmetry in nonlinear losses, whereas those based on nanowires yield only backward lasing due to a non-reciprocity in effective gain. Furthermore, the model indicates that backward lasing can yield a significantly higher Stokes output at the bus waveguide facets than lasing in the forward direction. Finally, considering a TE-polarized pump input for a (100) grown silicon ring Raman laser, I demonstrate numerically that the polarization state of the Stokes lasing radiation strongly depends on whether micro-scale or nano-scale waveguides are used.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2180
Ending Page	2190
Page Count	11
File Size	498139
File Format	PDF
ISSN	07338724
Volume Number	29
Issue Number	14
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Waveguide lasers Ring lasers Silicon Laser modes Pump lasers Laser excitation Stimulated emission optical polarization Raman scattering ring lasers silicon
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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