Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Attosecond measurement of fiber-optic chromatic dispersion by white-light interferometry

Not Accessible

Your library or personal account may give you access

Abstract

The capability offered by the low-coherence interferometry in the measurement of extremely small-optical path changes is well recognized.1 This technique is at the basis of attosecond chromatic-dispersion measurements. Figure 1 reports the realized optical circuit.2 Light from a superluminescent source is coupled to the fiber under test (FUT). The FUT is finished by two reflective splices and acts as a Fabry-Perot cavity. This cavity presents an optical-path unbalance that is fully compensated by the fiber-loop insert into the Mach-Zehnder cavity set in the receiver apparatus. When the compensating loop is kept in quiet conditions, any optical-path change in the FUT causes a fringe-shift that is measurable after C2. The double-cavity structure guarantees that any other optical-path change caused by the leading fiber is not revealed. In other words, the FUT is completely isolated from the unwanted perturbations. To increase the phase-reading precision, a carrier at frequency fc is provided by an acousto-optic modulator. The dispersion is measured by using four bandpass optical filters whose center wavelength spans the source spectrum and by reading the interference through the filters. As an example, consider the first two filters, F1 and F2. The same interference signal, coming from the coupler C2, is read with a different phase after the two filters because of the different center wavelengths. This difference in phase gives the measurement of the group velocity in the considered spectrum region. A symmetric measurement is performed in the source complementary spectrum region by the other two filters, F3 and F4. The difference between the two readings is, by definition, the measurement of the dispersion (in units of phase) in the considered spectrum zone.

© 1995 Optical Society of America

PDF Article
More Like This
Measuring geometric group-velocity dispersion in GRIN lenses by spatially coherent white-light interferometry

Hoang Yan Lin and Jyhpyng Wang
CFM7 Conference on Lasers and Electro-Optics (CLEO) 1995

Dispersion measurements of optical materials using white light interferometry

A.G. Van Engen, S.A. Diddams, and T.S. Clement
CWA8 Conference on Lasers and Electro-Optics (CLEO) 1998

Group delay dispersion measurement of Yb:YAB crystal with white-light interferometry

Weijian Yang, Jing Li, Fan Zhang, Yuanyang Zhang, and Zhigang Zhang
WB2_5 Conference on Lasers and Electro-Optics/Pacific Rim (CLEOPR) 2007

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved