Experimental observation of stimulated Raman scattering enabled localized structure in a normal dispersion FP resonator

• DOI: 10.1364/optica.496225
• Publication Date: 2023-09-20T15:02:22Z
• Authors: Tieying Li; Kan Wu; Xujia Zhang; Minglu Cai; Jianping Chen
• Keywords: 0303 health sciences; 03 medical and health sciences

Dissipative Kerr nonlinear cavities attract intense interest due to their rich dynamics and capability generate broadband, low-noise, mode-locked optical frequency combs for applications in communications, dual-comb spectroscopy, photonic lidar, etc. Different from the effect, which is an electronic response, stimulated Raman scattering (SRS) a delayed response molecular vibrations materials. In microcavities, when driven anomalous group velocity dispersion (GVD) regime, SRS typically leads self-frequency shift of solitons generation breather solitons, have been verified both theoretically experimentally. However, normal GVD recent theoretical work predicts that can cause locking switching waves (SWs) thus support bright moving localized structure (LS), we term as enabled (SRS-LS). Limited by design suitable experimental parameters, observation this SRS-LS not achieved yet. Here, provide numerical investigation and, our knowledge, first fiber Fabry–Perot (FP) resonator with ultra-low GVD. Such exhibits temporal features strong oscillations at ∼13THz local on top flat-top pulse. The corresponding spectrum low-noise broadband comb typical platicon-like center two Stokes anti-Stokes peaks located near ±13THz away center. With such comb, repetition rate ∼3.68GHz −30dB spectral width 255 nm. tooth count >8500, covering S + C L telecommunication bands. Moreover, formation process also revealed, it found plays key role its generation. Our will help advance study under influence SRS, well coherent source wide applications.