Characterization and modeling of a noncollinearly phase-matched femtosecond optical parametric oscillator based on KTA and operating to beyond 4 μm

Versatile femtosecond laser sources for time–resolved studies: configurations and characterizations

“…The specific variation of the refractive index of a nonlinear crystal with temperature, polarization, wavelength and angle of incidence defines its tuning behaviour and this is conveniently represented by phasematching curves which depict the output wavelengths as a function of these variable parameters. Figure 5 presents a phasematching diagram for the nonlinear crystal KTiOAsO 4 (KTA) which we have demonstrated in a femtosecond OPO (Reid et al 1997a). The open and closed symbols are experimental tuning data at pump wavelengths of 816 and 846 nm, respectively, for the signal (circles) and idler (squares) outputs.…”

Optical Autocorrelation Measurement for Ultrafast Pulses at NIR Wavelengths Using GaP, GaAsP, and Si Photoconductive Detectors

“…Strict phase mismatching for harmonic generation tends to invoke spectral filtering to ensure that the measured autocorrelation function is incorrect and distorted. Several groups have previously reported on the application of TPA-and 3PA-based phenomena for pulse diagnostics of ultrafast optical pulses with PDs using Si [2,3], GaAsP [1,2,[4][5][6], GaP [7], InGaAs [8], SiC [9,10], ZnSSe [11], diamond [12], GaN [13], LEDs (light-emitting diodes) using AlGaAs [14], laser diodes composed of GaAsP [3], AlGaAs/GaAs [15], GaN [16], and photomultipliers, such as CsI, CuI, and GaAs PMTs [17,18], in standard autocorrelators. Multiple quantum-well waveguides and microcavity-structured optoelectronic devices have also been demonstrated [19,20].…”

2.54 W 1535 nm KTiOAsO4optical parametric oscillator within a diode-side-pumped acousto-opticallyQ-switched Nd : YAG laser

“…As for laser gain materials, Nd : YAG, Nd : YVO 4 , Nd : GdVO 4 , Nd : YLF and Nd : YAP have been widely used to generate nanosecond (ns) or picosecond (ps) laser pulses and Ti : sapphire has been selected for femitosecond (fs) or ps lasers. For extracavity KTA OPOs, Ti : sapphire lasers and several Nd-doped lasers were used as the pumping sources [6][7][8][9][10][11][12][13]. Lasers made of Ti : sapphire crystals were used to produce fs and ps pulses in [6][7][8] and [9], respectively.…”

“…For extracavity KTA OPOs, Ti : sapphire lasers and several Nd-doped lasers were used as the pumping sources [6][7][8][9][10][11][12][13]. Lasers made of Ti : sapphire crystals were used to produce fs and ps pulses in [6][7][8] and [9], respectively. Nd : YVO 4 laser (ps), Nd : YAG lasers (ns) and Nd : YLF lasers (ns) were selected in [10], [11,12] and [13], respectively.…”