Microwave photonic notch filter with complex coefficient based on four wave mixing

A microwave photonic notch filter with a complex coefficient is proposed and demonstrated based on four wave mixing（FWM）. FWM effect of two single-frequency laser beams occurs in a highly nonlinear fiber（HNLF）, and multi-wavelength optical signals are generated and used to generate the multi-tap of...

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Bibliographic Details
Published in:Optoelectronics letters 2016-11, Vol.12 (6), p.417-420
Main Author: 许东 曹晔 童峥嵘 杨菁芃
Format: Article
Language:English
Subjects:
Bandpass filters
Coefficients
Four-wave mixing
Frequency response
Laser beams
Lasers
Microprocessors
Microwave photonics
Notch filters
Optical communication
Optical data processing
Optical Devices
Optics
Phase modulation
Photonics
Physics
Physics and Astronomy
Sidebands
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Summary:A microwave photonic notch filter with a complex coefficient is proposed and demonstrated based on four wave mixing（FWM）. FWM effect of two single-frequency laser beams occurs in a highly nonlinear fiber（HNLF）, and multi-wavelength optical signals are generated and used to generate the multi-tap of microwave photonic filter（MPF）. The complex coefficient is generated by using a Fourier-domain optical processor（FD-OP） to control the amplitude and phase of the optical carrier and phase modulation sidebands. The results show that this filter can be changed from bandpass filter to notch filter by controlling the FD-OP. The center frequency of the notch filter can be continuously tuned from 5.853 GHz to 29.311 GHz with free spectral range（FSR） of 11.729 GHz. The shape of the frequency response keeps unchanged when the phase is tuned.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-016-6167-2