Title :
Relative-intensity-noise reduction technique for frequency-converted radio-on-fiber system
Author :
Taguchi, Nobuyoshi ; Tanaka, Shoji ; Atsumi, Yuki ; Kimura, Tomohiro
Author_Institution :
Optowave Lab. Inc., Kanagawa, Japan
Abstract :
A frequency-converted radio-on-fiber (ROF) system that reduces the relative-intensity-noise (RIN) caused by reflection at optical fiber connectors is proposed. It is based on the simultaneous transmission of intermediate frequency (IF) and local-oscillation (LO) frequency. Optimum LO frequency and optical modulation index (OMI) that minimize RIN are investigated by experiments and calculations assuming the multi-reflection situation with random delays. The results agree well and show that RIN suppression is best achieved with high OMI and low LO frequency. RIN improvement of 10dB is obtained by this technique. The maximum number of connectors is also investigated. One calculation suggests that the proposed system can support 79 connectors, many more than the 13 possible with existing systems.
Keywords :
optical frequency conversion; optical noise; radio-over-fibre; RIN suppression; frequency-converted radio-on-fiber system; intermediate frequency; local-oscillation frequency; microwave photonics; multi-reflection situation; optical fiber connectors; optical modulation index; optical noise; random delays; relative-intensity-noise reduction; Connectors; Frequency conversion; Optical feedback; Optical fibers; Optical filters; Optical modulation; Optical transmitters; Phase locked loops; RF signals; Radio frequency;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516510
