Reciprocating optical modulation for millimeter-wave generation by using a dual-section fiber Bragg grating

• Published in: Journal of lightwave technology Vol. 20; no. 8; pp. 1408 - 1415
• Main Authors: Kawanishi, T., Oikawa, S., Izutsu, M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2002; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: All optical circuits; Applied sciences; Baseband; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Equations; Exact sciences and technology; Intensity modulation; Nonlinear optics; Optical and optoelectronic circuits; Optical filters; Optical harmonic generation; Optical mixing; Optical modulation; Phase modulation; Read only memory; Millimetric wave; millimeter wave; Mode coupling; Filter; reciprocating; Bragg grating; Harmonic generation; Wave generation; Optical modulation; Optical fiber
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2002.800340

We investigated reciprocating optical modulation (ROM) for millimeter-wave generation. The system was composed of an optical phase modulator and a pair of optical filters. A lightwave modulated by V-band millimeter waves was obtained from a 5-GHz electric signal. The spectrum linewidths of the generated 60-GHz millimeter wave was smaller than 300 Hz. By using mode-coupling equations, the spectra of the output lightwave were theoretically calculated. It was shown that the spectra depend on the optical path length between the two optical filters, so that harmonic generation and mixing with baseband signals can be obtained simultaneously. Intensity modulation of the generated millimeter wave was demonstrated by applying a baseband signal to the modulator without using another electric or optical modulator.