A simple all-fiber design for implementing an all-optical temporal Hilbert transformer is proposed and numerically demonstrated. We show that an all-optical Hilbert transformer can be implemented using a uniform-period fiber Bragg grating (FBG) with a properly designed amplitude-only grating apodization profile incorporating a single π phase shift in the middle of the grating length. All-optical Hilbert transformers capable of processing arbitrary optical waveforms with bandwidths up to a few hundreds of gigahertz can be implemented using feasible FBGs.
© 2009 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: October 10, 2008
Revised Manuscript: November 26, 2008
Manuscript Accepted: December 10, 2008
Published: January 27, 2009
Mohammad H. Asghari and José Azaña, "All-optical Hilbert transformer based on a single phase-shifted fiber Bragg grating: design and analysis," Opt. Lett. 34, 334-336 (2009)