Title :
Low-drift modulator without feedback
Author :
Whitaker, N.A., Jr. ; Lustberg, R.J. ; Gabriel, M.C. ; Avramopoulos, H.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
A low-drift amplitude modulator has been demonstrated using a fiber Sagnac interferometer with a lithium-niobate phase modulator. Although the fiber-loop length must be adjusted for the modulation rate, this type of modulator structure is inherently insensitive to variations in the voltage bias of the drive signal, as well as to temperature variations.<>
Keywords :
amplitude modulation; electro-optical devices; fibre optic sensors; integrated optics; light interferometers; lithium compounds; optical modulation; phase modulation; LiNbO/sub 3/; drive signal; feedbackless optical modulator; fiber Sagnac interferometer; fiber-loop length; low-drift amplitude modulator; modulation rate; modulator structure; phase modulator; temperature variations; voltage bias; Amplitude modulation; Feedback; Optical interferometry; Optical modulation; Optical waveguides; Phase modulation; Pulse modulation; Sagnac interferometers; Stability; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
