Title :
Interferometric polarization-independent modulator in LiTaO3
Author :
Jung, Hong-Sik ; Taylor, Henry F. ; Eknoyan, O.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
10/1/1990 12:00:00 AM
Abstract :
Polarization-independent Mach-Zehnder modulators that utilize the off-diagonal r51 electrooptic coefficient are produced in LiTaO3. The waveguides are formed by Zn vapor diffusion. Extinction values of 85% at 0.633-μm wavelength are demonstrated for both transverse electric and transverse magnetic polarization using a single control voltage and thermal tuning. The relatively large voltage-length product values (VL⩾15 V-cm) attained in these devices are attributed to a weak overlap between optical and electrical field profiles. Electrode alignment and dielectric loading are critical factors for the optimization of device operation
Keywords :
electro-optical devices; integrated optics; light interferometers; light polarisation; lithium compounds; optical modulation; 0.633 micron; LiTaO3; Mach-Zehnder modulators; TE; TM; Zn; Zn vapor diffusion; dielectric loading; electrical field profiles; electrode alignment; interferometric modulators; off-diagonal r51 electrooptic coefficient; optical field profiles; polarization-independent modulator; single control voltage; thermal tuning; voltage-length product; waveguides; Electrodes; Electrooptic devices; Optical devices; Optical fiber polarization; Optical frequency conversion; Optical interferometry; Optical waveguides; Tellurium; Tensile stress; Voltage;
Journal_Title :
Lightwave Technology, Journal of
