Title :
Limitations of phase-shift method in measuring dense group delay ripple of fiber Bragg gratings
Author :
Niemi, Tapio ; Uusimaa, Maria ; Ludvigsen, Hanne
Author_Institution :
Metrol. Res. Inst., Helsinki Univ. of Technol., Finland
Abstract :
The phase-shift method is an established technique for measuring the group delay of fiber-optic components. In devices, such as chirped fiber Bragg gratings, the group delay exhibits ripple as a function of wavelength. We have analyzed the dependence of the measured ripple amplitude on the modulation frequency and present a physical model, which gives an analytical formula for estimating the measurement error.
Keywords :
Bragg gratings; chirp modulation; delays; measurement errors; optical fibre communication; optical fibre testing; optical modulation; chirped fiber Bragg gratings; dense group delay ripple; fiber Bragg gratings; fiber-optic components; group delay; measured ripple amplitude; measurement error; modulation frequency; phase-shift method; physical model; Amplitude estimation; Amplitude modulation; Chirp modulation; Frequency estimation; Frequency measurement; Frequency modulation; Optical fiber devices; Phase measurement; Propagation delay; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
