Experimental Investigations of Optical Nonlinearities in Semiconductor‐Doped Glass Waveguides

Abstract

Both, thermal and electronic optical nonlinearities are studied in semiconductor-doped glass (SDG) waveguides which are fabricated in commerciolly available sharp-cut filters by Csf-K+ ion exchange. The relaxation time in photodarkened substrates is measured to be 30ps. By means of a prism coupling set-up the saturation value of the nonlinear index change is dettrmined. Furthermore, a high stability dual-beam interferometer is presented for the measurement of both, thermal and electronic nodinear refractive index n, in planar waveguides. Conclusions about the application of SDG t o opto-optical switching are given.Thermische und elektronische optische Nichtlinearitaten in Wellenleitern, hergestellt durch Cs+-Kf-Ionenaustausch in halbleiterdotiertem Glas (kommerziell verfiigbar als Stcilkantenfilter) worden unt.ersucht. Die Relaxationszeit in durch Laserbestrahlung gealterten Proben betragt 30 ps. Nittels eines Prismenkopplers wird der Sattigungswert der lichtinduzierten Brechzahliinderung bestimmt. Weiterhin wird ein hochstabiles 2-Strahl-Interferometer zur Messung thermischer und elektronischer nichtlinearer Brechzahlanderungen in ebenm Wellenleitem vorgcstellt. SchluBfolgerungen bezuglich einer Anwendung halbleiterdotierter G l a m in opto-optischen Scheltern werden gezogen.

Power self-regulation in double-pass high-gain laser amplifiers

“…Thus the underlying optical interactions have been considered to occur in dyes and polymers, 2-11 liquid crystals, [12][13][14][15][16][17][18][19][20][21] inorganic nonlinear optical media, [22][23][24][25][26][27][28] and semiconductors. [29][30][31][32][33][34][35] Besides their basic transmission interactions, some opto-optical systems have included gratings, interferometers, and lasers. These systems have served to modulate the amplitude, phase, and direction of a propagating beam; and they have also been employed for a variety of optical switching and logic functions.…”

All-optical Integrated Nonlinear Devices

“…Distributed input couplers have largely been employed for the analysis of nonlinear planar waveguides, yielding information on the magnitude, sign, and response-time of the nonlinearity [16][17][18][19][20][21][22][23][24] . In this respect, the grating coupler allows good control of the coupling parameters and, therefore, the extraction of more precise information about the nonlinear properties of media than a prism coupler .…”