10.2.INTERFEROMETRICAUTOCORRELATION(IAC)343ImageremovedduetocopyrightrestrictionsPlease see:Keller,U.,UltrafastLaserPhysics,InstituteofQuantum Electronics,SwissFederal Institute ofTechnologyETHHonggerberg—HPT,CH-8093Zurich,Switzerland.Figure 10.5: Effect of various amounts of second order dispersion on a trans-formlimited10fsSech-pulse.10.2.4Third OrderDispersionWe expect, that third order dispersion affects the pulse significantly forD3>1T3which is for a 10fs sech-pulse D3 > (10)3 ~183 fs3. Figure 10.6 and 10.77show the impact on pulse shape and interferometric autocorrelation. Theodd dispersion term generates asymmetry in the pulse. The interferometricautocorrelation developes characteristic nodes in the wings
10.2. INTERFEROMETRIC AUTOCORRELATION (IAC) 343 Figure 10.5: Effect of various amounts of second order dispersion on a transform limited 10 fs Sech-pulse. 10.2.4 Third Order Dispersion We expect, that third order dispersion affects the pulse significantly for D3 τ 3 > 1 which is for a 10fs sech-pulse D3 > ¡ 10 fs 1.76 ¢3 ˜183 fs3. Figure 10.6 and 10.7 show the impact on pulse shape and interferometric autocorrelation. The odd dispersion term generates asymmetry in the pulse. The interferometric autocorrelation developes characteristic nodes in the wings. Keller, U., Ultrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg—HPT, CH-8093 Zurich, Switzerland. Image removed due to copyright restrictions. Please see:
344CHAPTER10.PULSECHARACTERIZATIONImageremovedduetocopyrightrestrictionsPleasesee:Keller,U.,UitrafastLaserPhysics,InstituteofQuantumElectronics,SwissFederal InstituteofTechnologyETH Honggerberg—HPT, CH-8093 Zurich, Switzerland.Figure 10.6: Impact of 200 fs3 third order dispersion on a 10 fs pulse at acenter wavelength of 800nm.and itsinterferometricautocorrelation.Imageremovedduetocopyright restrictionsPleasesee:Keller, U.,Ulitrafast LaserPhysics, Institute ofQuantum Electronics,Swiss Federal Institute ofTechnologyETHHonggerberg—HPT,CH-8093Zurich,Switzerland.Figure 10.7: Changes due to increasing third order Dispersion from 100-1000fs3on a 10 fs pulse at a center wavelength of 800 nm
344 CHAPTER 10. PULSE CHARACTERIZATION Figure 10.6: Impact of 200 fs3 third order dispersion on a 10 fs pulse at a center wavelength of 800 nm.and its interferometric autocorrelation. Figure 10.7: Changes due to increasing third order Dispersion from 100-1000 fs3on a 10 fs pulse at a center wavelength of 800 nm. Keller, U., Ultrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg—HPT, CH-8093 Zurich, Switzerland. Keller, U., Ultrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg—HPT, CH-8093 Zurich, Switzerland. Image removed due to copyright restrictions. Please see: Image removed due to copyright restrictions. Please see:
34510.2.INTERFEROMETRICAUTOCORRELATION(IAC)10.2.5Self-Phase ModulationSelf-phase modulation without compensation by proper negative dispersiongenerates a phase over the pulse in the time domain.This phase is invisiblein the intensity autocorrelation, however it shows up clearly in the IAC, seeFigure 10.8 for a Gaussian pulse with a peak nonlinear phase shift po =8A = 2 and Figure 10.8 for a nonlinear phase shift Φo = 3.Image removed due to copyright restrictionsPleasesee:KellerUUltrafastaserPhysics,InstituteofQuantumlectronicsSwissFederalInstituteofechnogyETH Honggerberg—HPT, CH-8093Zurich, SwitzerlandFigure 10.8: Change in pulse shape and interferometric autocorrelation ina 10 fs pulse at 800 nm subject to pure self-phase modulation leading to anonlinear phase shift of po = 2
10.2. INTERFEROMETRIC AUTOCORRELATION (IAC) 345 10.2.5 Self-Phase Modulation Self-phase modulation without compensation by proper negative dispersion generates a phase over the pulse in the time domain. This phase is invisible in the intensity autocorrelation, however it shows up clearly in the IAC, see Figure 10.8 for a Gaussian pulse with a peak nonlinear phase shift φ0 = δA2 0 = 2 and Figure 10.8 for a nonlinear phase shift φ0 = 3. Figure 10.8: Change in pulse shape and interferometric autocorrelation in a 10 fs pulse at 800 nm subject to pure self-phase modulation leading to a nonlinear phase shift of φ0 = 2. Keller, U., Ultrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg—HPT, CH-8093 Zurich, Switzerland. Image removed due to copyright restrictions. Please see: