Design of a Franz–Keldysh effect electroabsorption waveguide modulator for millimetre-wave generation

✍ Scribed by M.S Leeson

• Book ID: 104159727
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 114 KB
• Volume: 34
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(02)00045-2

✦ Synopsis

An analysis of the generation of harmonics for millimetre-wave signals using a Franz-Keldysh e ect waveguide modulator is presented. The Franz-Keldysh electroabsorption is obtained via a method known to provide accurate results in comparison with experimental data. This is followed by an optimisation of the drive voltage in terms of the d.c. bias for a sinusoidal input. A spectrum rich in harmonics is produced and the ÿfth is considered in detail for device optimisation. The modulator considered is based on a large core multimode waveguide designed to yield a high coupling e ciency to single-mode ÿbres. The conÿnement factor, and hence the length, of the structure are determined via the e ective index method. The resulting device could be used for the cost-e ective production of millimetre-wave carriers via the harmonics generated whilst enabling the employment of electronics running at the speed of the fundamental.