We investigate the optical frequency comb generation based on axial mode interaction in a cylindrical microresonator with various shapes of radius variation. We claim that the axial group velocity dispersion in such a system does not depend on the shape of the radius variation and is anomalous regardless of the cylinder radius, which leads to the bright soliton solution.
We propose using a cylindrical microresonator as a highly dispersive compact delay line for the spectral measurements relying on the dispersive Fourier transformation method. The cylindrical geometry implies a large anomalous dispersion of group velocities for the whispering gallery modes propagating next to the surface of the cylinder. To prove the concept, we demonstrate the frequency-to-time mapping of an optical soliton dispersed by the microcavity made of standard telecom fiber SMF-28.
In present paper we employ numerical simulation, based on solution of system of coupled nonlinear Schrödinger equations, for demonstration of the possibility of ultra-narrow spectral generation in a Raman fiber laser with randomly distributed feedback. Line spectrum formation is caused by weak optical feedback due to Rayleigh backscattering if its impact overweighs the effects of nonlinear interactions. This can be observed either near the generation threshold, where generation power is low, or well above the threshold in case of artificially lowered nonlinear coefficient. Our simulation agrees well with previous experimental observations of ultra-narrow spectral modes in random fiber laser.
We present the theory of the power threshold of nonlinear effects in a cylindrical microresonator with a small effective radius variation. We demonstrate the fundamental dependence of decrements on the taper position along z. This feature makes it possible to achieve critical coupling without ultra-precise control of the distance between the microresonator and the taper. The power optimization performed in this way allows us to reduce the nonlinear threshold from tens of watts to hundreds of milliwatts.
We theoretically study the generation of a Kerr frequency combs in a cylindrical microresonator with an effective radius variation. We investigate a model describing the propagation of the whispering gallery modes on the surface of an optical fiber coupled to a source. We also discusses the details of the numerical scheme and the effect of numerical dispersion on the nonlinear generation of axial eigenmodes.
We investigate an impact of a small particle located on the surface of a fiber resonator on the dynamics of the whispering gallery modes (WGM) circulating near the fiber surface. We consider a single molecule of fibrinogen and bovine serum albumin that is put in contact with the surface of the fiber. We have studied both temporal dynamics of optical pulses propagating at the WGM as well as changes in the spectrum of WGM due to impact of the particle.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.