Abstract

Strong photosensitivity responses with the use of above-bandgap 157-nm F2-laser radiation are reported for standard germanosilicate fiber. A large 1.3 × 10-3 effective index change at 1.55 µm was inferred by trimming strong and weak Bragg gratings in hydrogen-free fiber. The F2-laser fluence-processing window of < 50~ mJ/cm2 is much lower than with traditional ultraviolet (UV) lasers. For hydrogen-soaked fiber, highly asymmetric refractive-index profiles were noted by atomic force microscopy and microreflection microscopy, yielding a peak index change of > 0.01 across a small 1-µm penetration depth at the fiber core. The index asymmetry appears to underlie the large > 5 × 10-5 value of laser-induced birefringence.

© 2003 IEEE

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