We report on a detailed characterization of the conversion efficiency from 1064 nm to second harmonic continuous wave laser light with periodically poled potassium titanyl phosphate crystal, with the aim of building a very efficient pump for the squeezer of the Advanced Virgo gravitational wave interferometric detector. Firstly, we study the crystal in a doublepass configuration for light at both fundamental and harmonic frequencies. We discuss how the beam alignment and laser mode hopping affect the second harmonic generation (SHG) performance and we give a detailed map of the mode hopping phenomenon in our laser source. Secondly, we employ the same double-pass crystal to form a Fabry-Perot cavity that is resonant at the fundamental frequency. We then study the efficiency of the SHG cavity as a function of the crystal temperature and input power, and demonstrate a conversion efficiency as high as (99 ± 1(stat.) ± 3(syst.))%, the efficiency being limited only by the onset of subharmonic pumped parametric downconversion.

Efficient second harmonic generation with compact design: Double-pass and cavity configurations / Leonardi, M.; Bazzan, M.; Conti, L.; Pegoraro, M.; Prodi, G. A.; Vardaro, M.; Zendri, J. -P.. - In: LASER PHYSICS. - ISSN 1054-660X. - 28:11(2018), p. 115401. [10.1088/1555-6611/aad84d]

Efficient second harmonic generation with compact design: Double-pass and cavity configurations

Leonardi M.;Prodi G. A.;Vardaro M.;
2018-01-01

Abstract

We report on a detailed characterization of the conversion efficiency from 1064 nm to second harmonic continuous wave laser light with periodically poled potassium titanyl phosphate crystal, with the aim of building a very efficient pump for the squeezer of the Advanced Virgo gravitational wave interferometric detector. Firstly, we study the crystal in a doublepass configuration for light at both fundamental and harmonic frequencies. We discuss how the beam alignment and laser mode hopping affect the second harmonic generation (SHG) performance and we give a detailed map of the mode hopping phenomenon in our laser source. Secondly, we employ the same double-pass crystal to form a Fabry-Perot cavity that is resonant at the fundamental frequency. We then study the efficiency of the SHG cavity as a function of the crystal temperature and input power, and demonstrate a conversion efficiency as high as (99 ± 1(stat.) ± 3(syst.))%, the efficiency being limited only by the onset of subharmonic pumped parametric downconversion.
2018
11
Leonardi, M.; Bazzan, M.; Conti, L.; Pegoraro, M.; Prodi, G. A.; Vardaro, M.; Zendri, J. -P.
Efficient second harmonic generation with compact design: Double-pass and cavity configurations / Leonardi, M.; Bazzan, M.; Conti, L.; Pegoraro, M.; Prodi, G. A.; Vardaro, M.; Zendri, J. -P.. - In: LASER PHYSICS. - ISSN 1054-660X. - 28:11(2018), p. 115401. [10.1088/1555-6611/aad84d]
File in questo prodotto:
File Dimensione Formato  
Leonardi_2018_Laser_Phys._28_115401.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.08 MB
Formato Adobe PDF
1.08 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/11572/296762
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact