Group delay measurement in single-mode fibers with true picosecond resolution using double optical modulation
Highly accurate group delay measurements in long single-mode fibers were achieved over the full 1200-1600 nm spectral range by measuring phase shifts of a modulated lightwave. The high modulation frequency is shifted down to the kilohertz range using a second optical modulation at the fiber output end, so that low-frequency, ultrasensitive detection and phase measurement can be performed with high-frequency resolution conserved. This results in extremely reliable measurements with a <1-ps resolution using a fully remote light source such as an LED or even a halogen lamp.
Univ of Geneva, Geneva, Switz Compilation and indexing terms, Copyright 2008 Elsevier Inc. 89034201031 0733-8724 DOUBLE OPTICAL MODULATION SINGLE-MODE FIBERS GROUP DELAY MEASUREMENT PHASE MEASUREMENT
Record created on 2008-09-29, modified on 2016-12-05