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A Zn‐diffused Mach–Zehnder modulator on lithium niobate at 1.55‐μm wavelength
Author(s) -
Twu RueyChing,
Chang ChingYu,
Wang WaySeen
Publication year - 2004
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20401
Subject(s) - lithium niobate , materials science , microwave , wavelength , voltage , electro optic modulator , optical modulator , optoelectronics , mach–zehnder interferometer , optics , substrate (aquarium) , extinction ratio , electrical engineering , telecommunications , physics , phase modulation , engineering , interferometry , oceanography , phase noise , geology
Zn‐diffused Mach–Zehnder intensity modulators operating at 1.55‐μm wavelength are demonstrated on a z ‐cut and a y ‐cut LiNbO 3 substrate for the first time. The switching voltages are measured and the corresponding values of switching voltage‐length product are 9.6 V‐cm and 13.5 V‐cm for the z ‐cut and y ‐cut modulators, respectively. Both the modulated extinction ratios are about 20 dB. The results show that the Zn‐diffused modulators not only have electro‐optic tunability as great as that of the Ti‐diffused ones, but also have more flexibility for device fabrication. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 142–144, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20401