Broadband mid-IR frequency comb with CdSiP2 and AgGaS2 from an Er,Tm:Ho fiber laser.
Opt Lett
; 39(24): 6883-6, 2014 Dec 15.
Article
em En
| MEDLINE
| ID: mdl-25503021
ABSTRACT
We report on the generation of a 2500 nm bandwidth frequency comb at 6.5 µm central wavelength based on critically phase-matched parametric down-conversion in the nonlinear crystal CdSiP(2) (CSP), driven by a compact Er,TmHo fiber laser. The generated ultra-broadband pulses show a transform-limited duration of 2.3 optical cycles and carry up to 150 pJ of energy at a 100 MHz pulse repetition rate. For comparison, the spectrum generated in AgGaS(2) (AGS) spans from 6.2 to 7.4 µm at full-width at half-maximum (FWHM) with a pulse energy of 3 pJ. A full 3D nonlinear wave propagation code is used for optimization of the noncollinear angle, propagation direction, and crystal thickness.
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MEDLINE
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En
Ano de publicação:
2014
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Article