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<p>A waveguide-based optical parametric oscillator for coherent Raman scattering applications is presented, exploiting four-wave mixing in a silicon nitride waveguide. Benefiting from its long propagation length of 20&#xa0;mm in combination with a narrowband pump laser, idler pulses with an energy of up to 210&#xa0;pJ and a spectral bandwidth down to 11.2&#xa0;<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="340_2025_8397_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="38" /> </InlineMediaObject> <EquationSource Format="TEX">\(\hbox {cm}^{-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>cm</mtext> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> were obtained. By combining these narrowband idler pulses and the residual pump pulses, coherent Raman spectroscopy and microscopy were possible with a signal-to-noise ratio of up to 13.4. Thus, the presented compact and stable waveguide-based light source paves the way towards integrated lab-on-a-chip coherent Raman applications.</p>

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Waveguide-based optical parametric oscillator for coherent Raman scattering applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月6日

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  • Kristin Wallmeier,
  • Ming Gao,
  • Nick S. Lemberger,
  • Carsten Fallnich

摘要

A waveguide-based optical parametric oscillator for coherent Raman scattering applications is presented, exploiting four-wave mixing in a silicon nitride waveguide. Benefiting from its long propagation length of 20 mm in combination with a narrowband pump laser, idler pulses with an energy of up to 210 pJ and a spectral bandwidth down to 11.2  \(\hbox {cm}^{-1}\) cm - 1 were obtained. By combining these narrowband idler pulses and the residual pump pulses, coherent Raman spectroscopy and microscopy were possible with a signal-to-noise ratio of up to 13.4. Thus, the presented compact and stable waveguide-based light source paves the way towards integrated lab-on-a-chip coherent Raman applications.