Title :
Bandpass traveling-wave Mach-Zehnder modulator in LiNbO3 with domain reversal
Author :
Wang, W. ; Tavlykaev, R. ; Ramaswamy, R.V.
Author_Institution :
Photonics Res. Lab., Florida Univ., Gainesville, FL, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
A bandpass traveling-wave Mach-Zehnder modulator is demonstrated in a Z-cut LiNbO3 substrate where quasi-phase-matching is achieved by using a crystal domain reversal and a simple uniform coplanar waveguide electrode structure. The domain reversal was created, by using electric-field poling, to implement the three-section alternating electrooptic interaction. At the operating wavelength /spl lambda/=1.32 μm, the modulator has a 15 GHz-broad bandpass response centered at 25-GHz 3.6-dB fiber-to-fiber insertion loss, 12 V on-off voltage at the center frequency, and -33-dB extinction ratio.
Keywords :
Mach-Zehnder interferometers; coplanar waveguides; electro-optical modulation; electrodes; integrated optics; lithium compounds; optical waveguides; substrates; 1.32 mum; 12 V; 3.6 dB; GHz-broad bandpass response; LiNbO/sub 3/; Z-cut LiNbO/sub 3/ substrate; bandpass traveling-wave Mach-Zehnder modulator; center frequency; crystal domain reversal; dB extinction ratio; domain reversal; electric-field poling; fiber-to-fiber insertion loss; on-off voltage; operating wavelength; quasi-phase-matching; three-section alternating electrooptic interaction; uniform coplanar waveguide electrode structure; Bandwidth; Electrodes; Frequency; High speed optical techniques; Optical buffering; Optical modulation; Optical sensors; Optical signal processing; Optical waveguides; Radar antennas;
Journal_Title :
Photonics Technology Letters, IEEE
