Title :
Linear, 1*2 directional coupler modulator with 10 GHz bandwidth
Author :
Bulmer, C.H. ; Burns, W.K. ; Pickett, C.W.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
The characteristics are presented of a 1*2 coupler with coplanar stripline, traveling-wave electrodes designed for broadband operation to approximately 10 GHz. Modulators are fabricated by Ti diffusion in Z-cut, Y-propagating LiNbO/sub 3/ to form single-mode guides at the 1.3- mu m wavelength. Electrodes are defined over an approximately 0.3- mu m-thick SiO/sub 2/ buffer layer in approximately 3- mu m electroplated gold, with L=6.5 mm. The waveguide parameters and arm separation are designed with the aim of achieving coupling coefficients corresponding to 0.5>
Keywords :
directional couplers; electro-optical devices; integrated optics; lithium compounds; optical couplers; optical modulation; 0.3 micron; 1 kHz; 1.3 micron; 10 GHz; 10 to 11 GHz; 3 micron; LiNbO/sub 3/:Ti; SiO/sub 2/ buffer layer; arm separation; bandwidth; broadband operation; coplanar stripline; coupling coefficients; directional coupler; directional coupler modulator; electroplated Au; linear modulation performance; sensitivity; single-mode guides; traveling-wave electrodes; waveguide parameters; Bandwidth; Directional couplers; Dynamic range; Electric variables measurement; Electrodes; Frequency; Optical coupling; Optical sensors; Optical waveguides; Voltage;
Conference_Titel :
Broadband Analog Optoelectronics: Devices and Systems, 1990. Conference Digest., LEOS Summer Topical on
Conference_Location :
Monterey, CA, USA
DOI :
10.1109/BAODS.1990.205502
