Low‐voltage interferometric modulator in zinc‐diffused strontium barium niobate (SBN:60)

Autor:	J. D. Quinn, V. P. Swenson, O. Eknoyan, R. R. Neurgaonkar
Rok vydání:	1991
Předmět:	Physics and Astronomy (miscellaneous) Extinction ratio business.industry Strontium barium niobate Mach–Zehnder interferometer Polarization (waves) chemistry.chemical_compound Wavelength Interferometry Optics Prism coupler Optical modulator chemistry Optoelectronics business
Zdroj:	Applied Physics Letters. 59:28-30
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.105567
Popis:	Optical waveguides have been produced in Z‐cut Sr0.6Ba0.4Nb2O6 (SBN:6O) by zinc diffusion from vapor phase at 1000 °C for 30 min. Values of 7.3 μm for the diffusion depth and a surface concentration of 4.2×1020 cm −3 for Zn were obtained from an electron microprobe analysis. Electro‐optic modulation at 0.83 μm wavelength has been demonstrated on a Mach–Zehnder interferometer produced by this diffusion technique. An extinction ratio of 78% and a voltage‐length (VL) product of 0.48 V cm for a TM polarized input light were obtained. Prism coupler measurements on planar waveguides diffused at 800 °C for 6 h have shown an effective index increase of 0.025 for the fundamental mode in both TE and TM polarization.
Databáze:	OpenAIRE
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