Optical Analog Self-Interference Cancellation Using Electro-Absorption Modulators

An optical analog self-interference cancellation system for radio-frequency communications is proposed and experimentally demonstrated. The system uses two electro-absorption modulators, an optical attenuator and delay, and a balanced photodetector to subtract strong self-interference from a corrupt...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2013-02, Vol.23 (2), p.99-101
Main Authors: Chang, M. P., Fok, M., Hofmaier, A., Prucnal, P. R.
Format: Article
Language:English
Subjects:
Applied sciences
Bandwidth
Electro-absorption modulators (EAMs)
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Interference cancellation
microwave photonics
Optical attenuators
Optical elements, devices, and systems
Optical processors, correlators, and modulators
Optical receivers
Optical transmitters
Optics
Physics
Radio frequency
Radiocommunications
self-interference cancellation (SIC)
Telecommunications
Telecommunications and information theory
Transmitters. Receivers
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Summary:An optical analog self-interference cancellation system for radio-frequency communications is proposed and experimentally demonstrated. The system uses two electro-absorption modulators, an optical attenuator and delay, and a balanced photodetector to subtract strong self-interference from a corrupted received signal and recover a weak signal of interest. The system achieves >; 65 dB narrowband cancellation and >; 30 dB broadband cancellation across more than 40 MHz bandwidth for interference in both the 900 MHz and 2.4GHz bands. Both narrowband and broadband cancellation are frequency tunable, and can be combined with other forms of interference cancellation to achieve even higher levels of cancellation.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2013.2240288