Enhanced laser frequency stabilization to a high-finesse cavity through a combined feed-back and feed-forward correction

Year: 2025

Authors: Vezio P., Vinelli G., Mancini C., Chao L., Rosi G., Tino G.M., Salvi L.

Autors Affiliation: Univ Firenze, Dipartimento Fis & Astron, Sez Firenze, INFN, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Sez Firenze, LENS, INFN, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; Scuola Super Meridionale, Largo San Marcellino 10, I-80138 Naples, Italy; Complesso Univ Monte S Angelo, Ist Nazl Fis Nucl, Sez Napoli, Via Cinthia Edificio 6, I-80126 Naples, Italy; Harbin Inst Technol, Sch Instrument Sci & Engn, 92 Xidazhijie, Harbin, Heilongjiang, Peoples R China; Consiglio Nazl Ric CNR INO, Inst Nazl Ott, I-50019 Sesto Fiorentino, Italy.

Abstract: We demonstrate a novel and simple approach for laser frequency stabilization by implementing a combined feed-back + feed-forward scheme where the bulk of the noise reduction is performed by modulators that are external to the laser source. Our scheme produces a tunable and stabilized output beam having optical power comparable to the laser output and without any residual frequency modulation while retaining tunability of the laser frequency relative to the chosen reference, in our case a stable high-finesse optical cavity. The performance of the feed-forward loop is limited by the time delay introduced by the frequency shifter that applies the correction. The implemented setup only requires a few additional standard components compared to typical Pound-Drever-Hall locking schemes and it can be applied to laser sources ranging from near-infrared to near-UV. The high degree of versatility combined with good power efficiency and optical purity make the proposed solution a valid alternative to other methods that require the use of more complex electronics and optoelectronic systems. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Journal/Review: OPTICS EXPRESS

Volume: 33 (17)      Pages from: 36163  to: 36171

More Information: NextGenerationEU (I-PHOQS IR0000016, PE0000023-NQSTI, PE00000001-’RESTART’) ; Ministero dell’University e della Ricerca (PRIN 2022 2022TYN8A5, FARE-TENMA) ; QuantERA (SQUEIS GA 101017733) ; European Research Council (804815-MEGANTE) ; Instituto Nazionale di Fisica Nucleare (MOONLIGHT2) ; China Scholarship Council (202206120150) .
KeyWords: Side-band; Dye-laser; Locking; System; Phase; Instability; Shifts
DOI: 10.1364/OE.558538