Title :
Interferometric activated X switch: IAX
Author :
Pohlmann, Thomas ; Neyer, Andreas ; Voges, Edgar
Author_Institution :
Lehrstul fur Hochfrequenztech., Dortmund Univ., West Germany
fDate :
10/1/1989 12:00:00 AM
Abstract :
High-speed phase-linear switching with low crosstalk is accomplished by using balanced bridge interferometric switches with electrooptic tunable X couplers. The devices are fabricated by titanium indiffusion into X-cut, Y-propagating LiNbO3. Lumped-element and traveling-wave electrodes of aluminum, gold, and indium-tin oxide are investigated. Devices with a 3-dB bandwidth of 6.5 GHz using coplanar traveling-wave electrodes with a switching voltage of 7.0 V, an insertion loss of 4 dB, and -35 dB extinction ratio are realized for λ=1.3 μm. Improvements in DC drift stability due to electrodes and buffer layers of indium-tin oxide are reported
Keywords :
electro-optical devices; integrated optics; light interferometers; lithium compounds; optical couplers; optical losses; optical modulation; optical switches; titanium; 1.3 micron; 4 dB; 6.5 GHz; 7.0 V; Al; Au; DC drift stability; IAX; ITO; InSnO; LiNbO3:Ti; balanced bridge interferometric switches; buffer layers; electrooptic tunable X couplers; extinction ratio; high speed phase linear switching; insertion loss; interferometric activated X switch; low crosstalk; lumped element electrodes; modulator; switching voltage; traveling-wave electrodes; Aluminum; Bandwidth; Bridge circuits; Couplers; Crosstalk; Electrodes; Gold; Switches; Titanium; Voltage;
Journal_Title :
Lightwave Technology, Journal of
