Abstract

A fiber optic Fourier transform spectrometer capable of coherent interferogram averaging is constructed, for the first time to our knowledge. One fiber arm of the interferometer is periodically stretched, and the amplitudes of the fundamental and second harmonics of the modulation frequency in the photocurrent output are simultaneously detected. Successful operation results from the generation of an external clock for sampling the interferogram from the detected outputs varying in phase quadrature. Even when the moving mirror in the interferometer translates nonlinearly and two fiber arms receive random perturbations independently, sampling can be uniformly performed along the interferogram. From the experiments, variation of sampling start position on each interferogram was limited within 100 nm during one hundred repetitive scans. For 100 coherent averages, therefore, the SNR increased by ~10 without deformation.

© 1990 Optical Society of America

Full Article  |  PDF Article

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 OSA member, or as an authorized user of your institution.

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

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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