Large third-order optical nonlinearity of nanocluster-doped glass formed by ion implantation of copper and nickel in silica

By using femtosecond pulses from traveling-wave parametric generation we have accurately measured the absolute value and the frequency dispersion of the two-photon absorption coefficient of semiconductor nanocrystals embedded in a glass matrix. Comparison is made with bulk semiconductors.

No abstract

Optical parametric oscillator (OPO) and amplifier (OPA) devices air recognised as versatile coherent tunable spectrorcopic sources. Thin is borne out by our previous work on OPOs based on hulk P-banum borate (BBO) [ I ] and lithium niobate (LNB) [Z], in which tunability and optical bandwidth are achieved by injection seeding Wth single-mode tunable diode lasers (TDL). We now report a new modular spectroscopic syslem, ab depicted in Figure I : a TDL-seeded OPO based on periodically poled lithium niobate (PPLN) plus a bulk-LNB OPA.