Title :
A novel tunable all-optical incoherent negative-tap fiber-optic transversal filter based on a DFB laser diode and fiber Bragg gratings
Author :
Li, Shenping ; Chiang, K.S. ; Gambling, W.A. ; Liu, Y. ; Zhang, L. ; Bennion, I.
Author_Institution :
Optoelectron. Res. Centre, City Univ. of Hong Kong, Kowloon, China
Abstract :
We demonstrate experimentally a novel and simple tunable all-optical incoherent negative-tap fiber-optic transversal filter based on a distribution feedback laser diode and high reflection fiber Bragg gratings (FBGs). In this filter, variable time delay is provided by cascaded high reflection fiber Bragg gratings (FBGs), and the tuning of the filter is realized by tuning different FBG to match the fixed carrier wavelength, or adjusting the carrier wavelength to fit different FBG. The incoherent negative tapping is realized by using the carrier depletion effect in a distribution feedback laser diode.
Keywords :
Bragg gratings; delays; distributed feedback lasers; optical communication equipment; optical fibre filters; optical tuning; reflectivity; semiconductor lasers; DFB laser diode; carrier depletion effect; carrier wavelength; cascaded high reflection fiber Bragg gratings; distribution feedback laser diode; fiber Bragg gratings; fixed carrier wavelength; high reflection fiber Bragg gratings; incoherent negative tapping; tunable all-optical incoherent negative-tap fiber-optic transversal filter; variable time delay; Bragg gratings; Diode lasers; Fiber gratings; Laser feedback; Laser tuning; Matched filters; Negative feedback; Optical reflection; Transversal filters; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
