Latching type optical switch

Abstract

An optical switch on yttrium orthoferrite crystal is developed. The switch is of latching type and has an operating time of 100 ns. Matrices of switches are feasible due to the dimensions of the optical rotator of less than 2 mm3.

Effect of synthesis conditions on the preparation of YIG powders via co-precipitation method

“…When YFeO 3 powder was used as a rotator for magneto-optical switch, only a small coil is needed for switching. There is no need of an external magnetic field for providing stable states of the rotator, which substantially reduces the switching time [25,26]. Increasing the concentration of AOT enhanced the saturation magnetization.…”

The influence of growth rate on the microstructural and magnetic properties of float-zone grown crystals

“…Although orthoferrites have since been overtaken by ferromagnetic garnets for magnetic bubble devices, interest in orthoferrites again took off in the 1990s, particularly from the viewpoint of their domain wall dynamics, for the velocity of the domain wall motion in orthoferrites (at up to 20 km/s) is reported to be the highest known in any magnetically ordered media [9][10][11]. Recent investigations by Didosyan et al [12][13][14][15][16][17][18][19][20], report that orthoferrites show much promise for use in various innovative micro-technological devices such as magnetic sensors, magneto-optical current sensors, light spot position measurers, magneto-optical rotational speed sensors and fast latching optical switches.…”

Growth of YFeO3 crystal by edge-defined film-fed growth method

“…The magnetic domain of YIP crystal is much wider than that of the garnet crystal and the domain wall motion velocity of YIP crystal is currently highest among all ferromagnetic materials, which provides a faster rate when the optical switches are latched. Thus YIP crystal shows potential applications in many micro-technological devices [3,4]. Moreover, YIP is a congruent melting compound, which allows a fast growth rate to get a high quality crystal with large dimensions.…”