We introduce an optical parametric amplifier, pumped by an amplified femtosecond Yb:KGW laser, which directly generates broadly tunable mid-infrared (MIR) pulses, covering the whole vibrational spectrum from 3 to 10 pm. The avoidance of the traditional difference-frequency generation stage to access the MIR range simplifies the setup while enabling high conversion efficiencies. The two-stage design employs in the second stage either periodically poled lithium niobate, optimized for the CH/OH stretching region (3-5 pm) or LiGaS2, which allows extending the tunability to the fingerprint region (up to 10 pm). We anticipate applications of this versatile source to ultrafast vibrational spectroscopy and infrared microscopy. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Broadly tunable mid-infrared femtosecond pulses directly generated by an optical parametric amplifier

Villa, Andrea;Ross, Aaron M.;Gotti, Riccardo;Lamperti, Marco;Scotognella, Francesco;Cerullo, Giulio;Marangoni, Marco
2021-01-01

Abstract

We introduce an optical parametric amplifier, pumped by an amplified femtosecond Yb:KGW laser, which directly generates broadly tunable mid-infrared (MIR) pulses, covering the whole vibrational spectrum from 3 to 10 pm. The avoidance of the traditional difference-frequency generation stage to access the MIR range simplifies the setup while enabling high conversion efficiencies. The two-stage design employs in the second stage either periodically poled lithium niobate, optimized for the CH/OH stretching region (3-5 pm) or LiGaS2, which allows extending the tunability to the fingerprint region (up to 10 pm). We anticipate applications of this versatile source to ultrafast vibrational spectroscopy and infrared microscopy. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
2021
File in questo prodotto:
File Dimensione Formato  
Villa et al. - 2021 - Broadly tunable mid-infrared femtosecond pulses di.pdf

accesso aperto

: Publisher’s version
Dimensione 3.13 MB
Formato Adobe PDF
3.13 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1194143
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 6
social impact