Crystal-configuration considerations for higher-sensitivity picosecond-pulse SHG FROG

Šušnjar, Peter (avtor), Jones, Travis (avtor), Trebino, Rick (avtor), Petkovšek, Rok (avtor)

We experimentally compare a thick BIBO crystal, a walk-off compensating configuration of thin BBO crystals, and a thin PPLN crystal for the use as a nonlinear medium in SHG FROG, aiming for increased sensitivity required for complete pulse characterization of low-energy (below pJ) pulses a few picoseconds long at wavelengths near 1030 nm. We investigate the dependence of the spectral bandwidth of the frequency-doubled input ultrashort pulse and the conversion efficiency on focal-spot size in the nonlinear crystal. Both numerical and experimental results confirm an increase of the bandwidth with tighter focusing in a thick BIBO and a more-than-threefold increase of conversion efficiency compared to a thin BIBO crystal. A PPLN crystal is found to be the most efficient among the three, but very thin (< 0.3 mm) crystals would be required to extend the measurement capabilities of SHG FROG to sub-ps pulses. A SHG FROG using a PPLN crystal for characterization of picosecond pulse is demonstrated with a sensitivity of 2x10[sup]-3 (mW)[sup]2 .

• Jezik: Angleški jezik
• Ključne besede: nonlinear optics, ultrashort pulse, FROG, ultrashort pulse characterization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 05.02.2020
• Leto izida: 2020
• Št. strani: 8 str.
• Številčenje: Vol. 56, no. 2
• PID: 20.500.12556/RUL-138106
• UDK: 535.18(045)
• ISSN pri članku: 0018-9197
• DOI: 10.1109/JQE.2020.2971761
• COBISS.SI-ID: 17035547
• Datum objave v RUL: 11.07.2022

Gradivo je del revije

• Naslov: IEEE journal of quantum electronics
• Skrajšan naslov: IEEE j. quantum electron.
• Založnik: Institute of Electrical and Electronics Engineers
• ISSN: 0018-9197
• COBISS.SI-ID: 8561925

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 05.02.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nelinearna optika, ultrakratki laserski pulzi, FROG, karakterizacija ultrakratkih laserskih pulzov