Frequency comb generation threshold via second-harmonic excitation in χ(2) optical microresonators

  title={Frequency comb generation threshold via second-harmonic excitation in $\chi$(2) optical microresonators},
  author={Jan Szabados and Boris Sturman and Ingo Breunig},
  journal={arXiv: Optics},
We investigate the threshold of $\chi^{(2)}$ frequency comb generation in lithium niobate whispering gallery microresonators theoretically and experimentally. When generating a frequency comb via second-harmonic generation, the threshold for the onset of cascaded second-order processes leading to a comb is found to be approximately 85 $\mu$W. The second-harmonic generation efficiency up to this value is in excellent agreement with a previously known theoretical framework. This framework is… 

Figures from this paper

Fine structure of second-harmonic resonances in χ(2) optical microresonators.

This model describes SHG in WGRs with non-zero frequency detunings at both the pump and second-harmonic frequencies and describes the SHG efficiency as a function of detuning.

Dual backgrounds and their stability during χ(2) comb generation in microresonators

B. Sturman, E. Podivilov, J. Szabados and I. Breunig Institute of Automation and Electrometry, Russian Academy of Sciences, 630090 Novosibirsk, Russia Laboratory for Optical Systems, Department for

Robust Pulse-Pumped Quadratic Soliton Assisted by Third-Order Nonlinearity

The generation of a quadratic soliton in a pulse-pumped microresonator has attracted significant interest in recent years. The strong second-order nonlinearity and high peak power of pumps offer a

Parametric conversion via second harmonic generation and two-hump solitons in phase-matched microresonators

Frequency conversion in microresonators has revolutionised modern-day nonlinear and quantum optics. Here, we present a theory of the multimode second harmonic generation in microresonators under

Kerr nonlinearity-assisted quadratic microcomb

Generation of nonlinear frequency combs in χ (3) optical microresonators has attracted tremendous research interest during the last decade. Recently, realization of the microcomb owing to χ (2)

Photo-induced cascaded harmonic and comb generation in silicon nitride microresonators

Silicon nitride (Si3N4) is an ever-maturing integrated platform for nonlinear optics but mostly considered for third-order [χ(3)] nonlinear interactions. Recently, second-order [χ(2)] nonlinearity

Kerr Frequency Comb Interaction with Raman, Brillouin, and Second Order Nonlinear Effects

Kerr optical frequency comb as a novel microcomb source has found a variety of key applications from fundamental research to engineering applications. Generation of such microcombs require resonator

Low-threshold frequency comb generation using second-order nonlinearities in lithium niobate whispering gallery resonators

  • Jan SzabadosK. BuseI. Breunig
  • Physics
    2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
  • 2021
Optical frequency combs have become a key technology for optical precision measurements [1] and, moreover, bear potentials to boost the bandwidth of telecommunication networks [2] , to be applied for

Optical-parametric-oscillation-based χ^(2) frequency comb in a lithium niobate microresonator

N. Amiune, D.N. Puzyrev, V.V. Pankratov, D.V. Skryabin, K. Buse, and I. Breunig1,3,∗ 1Laboratory for Optical Systems, Department of Microsystems Engineering IMTEK, University of Freiburg,

Bright-soliton frequency combs and dressed states in χ(2) microresonators

We present a theory of the frequency comb generation in the high-Q ring microresonators with quadratic nonlinearity and normal dispersion and demonstrate that the naturally large difference of the



Frequency Comb Generation via Cascaded Second-Order Nonlinearities in Microresonators.

The first such comb that is based on a millimeter-sized microresonator made of lithium niobate, that allows for cascaded second-order nonlinearities is presented, and the observed combs correspond to Turing roll patterns.

Experimental observation of internally pumped parametric oscillation and quadratic comb generation in a χ(2) whispering-gallery-mode microresonator.

It is found that a wide range of different sideband frequency shifts can be generated by varying the experimental parameters under conditions where second-harmonic generation is close to natural phase matching.

Walk-off controlled self-starting frequency combs in χ(2) optical microresonators.

This work predicts walk-off controlled highly stable comb generation, which is drastically different from that known in the χ(3) case.

Frequency comb generation in quadratic nonlinear media

We experimentally demonstrate and theoretically explain the onset of optical frequency combs in a simple cavity-enhanced second-harmonic-generation system, exploiting second-order nonlinear

Ultra-efficient frequency comb generation in AlGaAs-on-insulator microresonators

By significantly reducing waveguide loss, ultra-low-threshold Kerr comb generation is demonstrated in a high- Q AlGaAs-on-insulator microresonator system.

Dynamics of the modulational instability in microresonator frequency combs

  • T. HanssonD. ModottoS. Wabnitz
  • Physics
    2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC
  • 2013
The generation of optical Kerr frequency combs by microresonators has attracted much interest in the last few years [1]. The equidistant and highly resolved spectral lines of these combs are expected

Modulation Instability Induced Frequency Comb Generation in a Continuously Pumped Optical Parametric Oscillator.

It is demonstrated that optical frequency combs can be generated in the parametric region around half of the pump frequency in a continuously driven OPO, and the analysis of the coherence properties of the simulated spectra shows the existence of correlated and phase-locked combs.

Optical frequency comb generation from a monolithic microresonator

This work reports a substantially different approach to comb generation, in which equally spaced frequency markers are produced by the interaction between a continuous-wave pump laser of a known frequency with the modes of a monolithic ultra-high-Q microresonator via the Kerr nonlinearity.

Frequency comb generation by a continuous-wave-pumped optical parametric oscillator based on cascading quadratic nonlinearities.

Optical frequency comb generation by a continuous-wave pumped optical parametric oscillator (OPO) without any active modulation is reported, leading to spectral broadening of the OPO signal beam via self-phase modulation.

Microresonator based optical frequency combs

Mid and near-IR optical frequency combs generation in ultra high Q crystalline and integrated SiN microcavities is presented. Moreover, universal dynamics that influences phase noise is described.