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.
Published in:
Photonics Technology Letters, IEEE
(Volume:13
,
Issue:
12
)
Date of Publication: Dec. 2001