Fiber Optic Microwave Links Using Balanced/Image Canceling Photodiode Mixing

Hideki KAMITSUNA  Hiroyo OGAWA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E76-C   No.2   pp.264-270
Publication Date: 1993/02/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Optical/Microwave Interaction Devices, Circuits and Systems)
Category: Optical-Microwave Mixers
Keyword: 
fiber optic link,  photodiode mixing,  balanced,  image canceling,  

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Summary: 
This paper proposes fiber optic link configurations for use in microwave and millimeter-wave transmission Higher frequencies,such as millimeter-waves, are well suited to transmission of broadband signals. Photodiodes can operate simultaneously as optical detectors and microwave frequency mixers thanks to their inherent nonlinearities. This allows us to increase the output radio frequncy. But, this also generates undesired spurious frequencies, necessitating the use of microwave filters. We discuss here two fiber optic link configurations, i.e., balanced/image canceling photodiode mixing links utilizing the combination of microwave functional components and optical devices to suppress the local/image frequency without filters. These configurations are experimentally investigated at microwave frequencies and local/image frequency suppression is successfully demonstrated.