Transmissive Fiber Bragg Grating-Based Delay Line Interferometer for RZ-OOK to NRZ-OOK Format Conversion

We propose a return-to-zero on-off keying (RZ-OOK) to non-return-to-zero (NRZ) OOK conversion scheme based on a transmissive phase-modulated fiber Bragg grating (PM-FBG). The PM-FBG has a spectrum similar to the combination of a delay line interferometer and a narrow band optical filter, which is de...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.140300-140304
Main Authors: Liu, Xin, Xu, Zuowei, Preciado, Miguel A., Gbadebo, Adenowo, Zhang, Lin, Xiong, Jiabi, Yu, Yu, Cao, Hui, Shu, Xuewen
Format: Article
Language:English
Subjects:
Algorithms
Bragg gratings
Conversion
Delay lines
Fiber gratings
fiber optics
Format
On-Off Keying
Optical device fabrication
optical fiber communication
optical fiber devices
Optical filters
Optical interferometry
Optical pulses
Optical sensors
Optical signal processing
Optimization
Ultraviolet lasers
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Description
Summary:We propose a return-to-zero on-off keying (RZ-OOK) to non-return-to-zero (NRZ) OOK conversion scheme based on a transmissive phase-modulated fiber Bragg grating (PM-FBG). The PM-FBG has a spectrum similar to the combination of a delay line interferometer and a narrow band optical filter, which is designed and synthesized using numerical optimization algorithm. The coupling strength of the PM-FBG is almost uniform and the grating period varies along the fiber length according to the optimization method. The designed PM-FBG has been fabricated using advanced ultraviolet laser inscription technique. Experimental results show that such a PM-FBG can perform RZ-OOK to NRZ-OOK format conversion successfully.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2938021