Yvan Klaver

• Master of Science
• PhD Student at University of Twente

Stimulated Brillouin scattering (SBS) is revolutionizing low-noise lasers and microwave photonics. However, a scalable and efficient integrated platform for Brillouin photonics has remained elusive. Here, we leverage the well-established thin-film lithium niobate (TFLN) platform to address these long-standing limitations. We report two distinct SBS...

Multi-layer Si3N4 waveguides, also known as Triplex waveguide technology, are a very promising waveguide platform for applications in microwave photonics and quantum photonics due to their low loss and compact circuit footprint. However to date, the Kerr nonlinearity of these multi-layer waveguides, in particular the asymmetric double-stripe (ADS)...

Microwave photonics, with its advanced high-frequency signal processing capabilities, is expected to play a crucial role in next-generation wireless communications and radar systems. The realization of highly integrated, high-performance, and multifunctional microwave photonic links will pave the way for its widespread deployment in practical appli...

Stimulated Brillouin scattering (SBS) is revolutionizing low-noise lasers and microwave photonic systems. However, despite extensive explorations of a low-loss and versatile integrated platform for Brillouin photonic circuits, current options fall short due to limited technological scalability or inadequate SBS gain. Here we introduce the thin-film...

Seamlessly integrating stimulated Brillouin scattering (SBS) in a low-loss and mature photonic integration platform remains a complicated task. Virtually all current approaches fall short in simultaneously achieving strong SBS, low losses, and technological scalability. In this work we incorporate stong SBS into a standard silicon nitride platform...

Silicon nitride is a promising waveguide platform for harnessing Kerr nonlinearity due to the low propagation loss, wide transparency range, and negligible two-photon absorption effect in the telecom wavelength range. However, the values of Kerr nonlinear coefficient of various low loss silicon nitride waveguide structures are not well defined. In...

Silicon nitride is a promising waveguide platform for harnessing Kerr nonlinearity due to the low propagation loss, wide transparency range, and negligible two-photon absorption effect in the telecom wavelength range. However, the values of Kerr nonlinear coefficient of various low loss silicon nitride waveguide structures are not well defined. In...

Silicon nitride is a promising waveguide platform for harnessing Kerr nonlinearity due to the low propagation loss, wide transparency range, and negligible two-photon absorption effect in the telecom wavelength range. However, the values of Kerr nonlinear coefficient of various low loss silicon nitride waveguide structures are not well defined. In...

Microwave photonics, with its advanced high-frequency signal processing capabilities, is expected to play a crucial role in next-generation wireless communications and radar systems. The realization of highly integrated, high-performance, and multifunctional microwave photonic links will pave the way for its widespread deployment in practical appli...

Microwave photonics, with its advanced high-frequency signal processing capabilities, is expected to play a crucial role in next-generation wireless communications and radar systems. The realization of highly integrated, high-performance, and multifunctional microwave photonic links will pave the way for its widespread deployment in practical appli...

Silicon oxynitride (SiON) is a low-loss and versatile material for linear and nonlinear photonics applications. Controlling the oxygen-to-nitrogen (O/N) ratio in SiON provides an effective way to engineer its optical and mechanical properties, making it a great platform for the investigation of on-chip optomechanical interactions, especially the st...

We measure Brillouin-scattering in geometrically and cladding engineered tellurite covered silicon nitride waveguide in which we report gain values of 80.9 m –1 W –1 and 76.3 m –1 W –1 , a 150 times improvement over previous silicon nitride based waveguides.

We report first d emonstration o f m icrowave p hotonic n otch fi lter ba sed on Stimulated Brillouin scattering in a thin-film lithium niobate waveguide. We achieve a re-jection of 15 dB with a filter bandwidth of 16 MHz and utilizing only 0.45 dB on-chip SBS gain.

We observed the first-ever Brillouin scattering in thin-film lithium niobate (TFLN) waveguides. The z-cut TFLN waveguide, at 20° rotation angle, achieves a remarkable 84.9 m ⁻ ¹ W ⁻ ¹ Brillouin gain coefficient, facilitated by 8.06 GHz surface acoustic waves.

We observed the first-ever Brillouin scattering in thin-film lithium niobate (TFLN) waveguides. The z-cut TFLN waveguide, at 20° rotation angle, achieves a remarkable 84.9 m-1W-1 Brillouin gain coefficient, facilitated by 7.88 GHz surface acoustic waves.

We observed the first-ever Brillouin scattering in thin-film lithium niobate (TFLN) waveguides. The z-cut TFLN waveguide, at 20° rotation angle, achieves a remarkable 84.9 m-1W-1 Brillouin gain coefficient, facilitated by 7.88 GHz surface acoustic waves.

Nonlinear optical effects including stimulated Brillouin scattering (SBS) and four-wave mixing (FWM) play an important role in microwave photonics, optical frequency combs, and quantum photonics. Harnessing SBS and FWM in a low-loss and versatile integrated platform would open the path to build large-scale Brillouin/Kerr-based photonic integrated c...

Stimulated Brillouin scattering (SBS), a coherent nonlinear effect coupling acoustics and optics, can be used in a wide range of applications such as Brillouin lasers and tunable narrowband RF filtering. Wide adoption of such technologies however, would need a balance of strong Brillouin interaction and low optical loss in a structure compatible wi...

We show, for the first time, stimulated Brillouin scattering in tellurite covered silicon nitride waveguides. In the standard geometry the measured peak gain coefficient is 4.5 m−1W−1. We further enhance the Brillouin gain by applying cladding engineering, reaching a peak gain coefficient of 8.5 m−1W−1

We investigate a numerical model to simulate the optical frequency comb generation in Kerr and Brillouin active resonators with gain parameters in the same order of magnitude. We show that either a backward or forward comb can be generated directly on a Brillouin laser or a cascaded Brillouin lasing mode respectively for a multi-layered silicon nit...

We investigate a numerical model to simulate the optical frequency comb generation in Kerr and Brillouin active resonators with gain parameters in the same order of magnitude. We show that either a backward or forward comb can be generated directly on a Brillouin laser or a cascaded Brillouin lasing mode respectively for a multi-layered silicon nit...

Nonlinear optical effects including stimulated Brillouin scattering (SBS) and four-wave mixing (FWM) play an important role in microwave photonics, optical frequency combs, and quantum photonics. Harnessing SBS and FWM in a low-loss and versatile integrated platform would open the path to building large-scale Brillouin/Kerr-based photonic integrate...

Fully integrated supercontinuum sources on‐chip are critical to enabling applications such as portable and mechanically stable medical imaging devices, chemical sensing, and light detection and ranging. However, the low efficiency of current supercontinuum generation schemes prevents full on‐chip integration. Herein, a scheme where the input energy...

Microwave photonics has adopted a number of important concepts and technologies over the recent pasts, including photonic integration, versatile programmability, and techniques for enhancing key radio frequency performance metrics such as the noise figure and the dynamic range. However, to date, these aspects have not been achieved simultaneously i...

Coherent optomechanical interaction known as stimulated Brillouin scattering (SBS) can enable ultrahigh resolution signal processing and narrow-linewidth lasers. SBS has recently been studied extensively in integrated waveguides; however, many implementations rely on complicated fabrication schemes. The absence of SBS in standard and mature fabrica...

Fully integrated supercontinuum sources on-chip are critical to enabling applications such as portable and mechanically-stable medical imaging devices, chemical sensing and LiDAR. However, the low-efficiency of current supercontinuum generation schemes prevent full on-chip integration. In this letter, we present a scheme where the input energy requ...

Silicon nitride (SiN) waveguides need to be thick to show low dispersion which is desired for nonlinear applications. However, high quality thick SiN produced by chemical vapour deposition (CVD) contains high internal stress, causing it to crack. Crack-free wafers with thick SiN can be produced by adding crack barriers. We demonstrate the use of di...

Microwave photonics (MWP) has adopted a number of important concepts and technologies over the recent pasts, including photonic integration, versatile programmability, and techniques for enhancing key radio frequency performance metrics such as the noise figure and the dynamic range. However, to date, these aspects have not been achieved simultaneo...

We employ a genetic algorithm to optimize the stimulated Brillouin scattering gain coefficient i n a s ymmetric d ouble-stripe ( SDS) S i 3 N 4 w aveguide. We a chieve 15 × enhancement compared to previous results. Further, we verify the numerical findings with measurements for a selected set of SDS waveguides.

We show the first all silicon nitride microwave photonic notch filter using stimulated Brillouin scattering (SBS). The filter has a rejection of more than 60 dB, a linewidth of 1 GHz, and a tunable center frequency over 1 GHz.

Stimulated Brillouin scattering (SBS) can enable high-resolution signal processing. Here, we demonstrate advanced control of SBS in multilayer silicon nitride waveguides. We further utilize the SBS gain to demonstrate a high-rejection microwave photonic notch filter.

Integrated mode-locked lasers are useful tools in microwave photonic applications as a local oscillator. In particular, hybrid integrated lasers could easily be integrated with passive processing circuits. In this Letter, we report on the self-mode-locking of a hybrid integrated laser comprising two indium phosphide gain sections and a silicon nitr...

Coherent optomechanical interaction between acoustic and optical waves known as stimulated Brillouin scattering (SBS) can enable ultra-high resolution signal processing and narrow linewidth lasers important for next generation wireless communications, precision sensing, and quantum information processing. While SBS has recently been studied extensi...

Integrated microwave photonics (MWP) is a fast growing area where high frequency microwave signals are processed in the optical domain, merging key advantages of both microwave photonics and photonic integrated circuits (PICs) technologies including low-loss, reconfigurability, advanced functionality, enhanced stability, and reduced footprint. Plen...