Broadband characterization of the nonlinear optical properties of common reference materials

Experimental Characterization of the Ultrafast, Tunable and Broadband Optical Kerr Nonlinearity in Graphene

“…This data trend coincides with previously reported Z-scan studies on graphene performed with picosecond excitation where the n 2,e f f is larger than what is reported in the femtosecond regime. In addition to this, a similar comparative analysis performed on carbon disulphide (CS 2 ), reference material used for calibration of Z-scan measurements, revealed a similar dependence of the n 2,e f f on pulse duration 32 . In a recent publication 10 , this pulse-width dependence of n 2,e f f is theoretically derived for a regime when the effective decay constant is larger than the pulse duration in Z-scan measurements.…”

Efficient operation of a diode-pumped multi-watt continuous wave Yb:KYW laser with excellent beam quality

“…Thermal effects were found to play an important role in determining the laser efficiency and beam quality. Multi-watt operation with excellent beam quality is a general requirement for efficient mode locking performance [38,39] and applications in nonlinear optics [40][41][42]. The results reported in this work indicate that Yb:KYW is an efficient and competitive gain medium when compared to other Yb-doped laser materials.…”

High power continuous-wave dual-wavelength alexandrite laser

“…Laser-active media with broadband gain are widely employed for the generation of ultrashort pulses [1][2][3][4][5][6][7][8][9][10][11] that can be used in a variety of applications such as frequency conversion or spectroscopy [12][13][14][15][16][17][18][19][20][21][22][23]. Another important aspect of broadband gain is that it offers a possibility to produce dual-wavelength output with terahertz (THz) frequency offset [24][25][26][27] which can be used to generate THz radiation.…”