Open AccessExploiting optical nonlinearities for group delay dispersion compensation in femtosecond optical parametric oscillators
Author(s) -
Ignas Stasevičius,
Mikas Vengris
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.399083
Subject(s) - optics , resonator , femtosecond , group delay dispersion , dispersion (optics) , optical parametric oscillator , nonlinear optics , laser , self phase modulation , second harmonic generation , materials science , physics , wavelength , optical fiber , dispersion shifted fiber , fiber optic sensor
A wavelength tunable femtosecond optical parametric oscillator pumped by the second harmonic of a Yb: KGW solid state oscillator was investigated. The intracavity group delay dispersion was positive, and soliton condition was satisfied by introducing negative nonlinearity from cascaded quadratic nonlinearity (CQN). Two different approaches were investigated - CQN induced by the same amplifying nonlinear crystal or CQN induced by an additional second harmonic generating nonlinear crystal inside the same resonator. The second crystal was shown to correct the resonator misalignment induced by the rotation of the amplifying crystal as the wavelength was tuned in the range of 770-970 nm. It simultaneously compensated positive resonator GDD offsets of +/- 1000 fs 2 with +/- 5% SHG power losses, simulating a method for compensation of GDD ripples in a broadband mirror.