Title :
Broadband Frequency-Modulated Continuous-Wave Signal Generation by Optical Modulation Technique
Author :
Kanno, Atsushi ; Kawanishi, Tetsuyas
Author_Institution :
Photonic Network Res. Inst., Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan
Abstract :
Optical frequency-modulated continuous-wave (FM-CW) signal generation with a bandwidth of 35 GHz and a pulse duration of 1 μs in the range of 75-110 GHz is demonstrated with an optical frequency multiplier consisting of an optical modulator and optical filters. The FM-CW signal generator is used as a signal source for the surveillance of obstacles and debris in a large area by a distributed radar system connected to the optical fiber network. The system for millimeter-wave FM-CW signal generation is realized using the functions of a multi-frequency band and segmentation of the radar heads with several channels to avoid radio-frequency interference. The wavelength-division multiplexing technology with simple optical heterodyning aids in realizing these functions with high availability.
Keywords :
frequency modulation; heterodyne detection; light sources; microwave photonics; millimetre wave generation; optical communication equipment; optical fibre filters; optical fibre networks; optical modulation; optical radar; radio-over-fibre; wavelength division multiplexing; bandwidth; bandwidth 35 GHz; bandwidth 75 GHz to 110 GHz; debris surveillance; distributed radar system; millimeter-wave FM-CW signal generation; multifrequency band; obstacle surveillance; optical fiber network; optical filters; optical frequency multiplier; optical frequency-modulated continuous-wave signal generation; optical heterodyne detection; optical modulation technique; radar head segmentation; signal source; time 1 mus; wavelength-division multiplexing technology; Laser radar; Optical interferometry; Optical mixing; Optical modulation; Optical pulses; Optical sensors; Optical signal processing; Frequency-modulated continuous-wave; millimeter-wave radar; optical frequency domain reflectometry; optical modulation; radio over fiber;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2318724
