The fast mode of optical discharge propagation in optical fibres was observed. In contrast to the known fibre fuse effect
such optical discharge propagation is accompanied by fibre cracks and velocity reaches≈3km/s under the intensity 40W/ μm2.
The effect of hydrogen loading on near-UV photosensitivity of germanosilicate glass is studied. The enhanced bleaching of 390 nm luminescence band and 240 nm absorption band, as well as enhanced growth of 650 nm luminescence band in hydrogen loaded samples is observed. The increase of paramagnetic GeE' defects concentration and creation of hydrogen related paramagnetic H(II) centers is obtained. Long period index gratings with low insertion loss and index change as large as 4 multiplied by 10-4 are fabricated by near-UV argon laser radiation in hydrogen loaded fibers. The effect of gamma irradiation on the properties of the fabricated gratings is reported.
We report for the first time the refractive index grating side-writing in 10 mol.% GeO2-doped fiber by near-UV light of cw Ar+-laser (333 - 364 nm). The magnitude of induced index change as large as 1.9 multiplied by 10-4 at 1.7 multiplied by 105 W/cm2 UV power density has been achieved. The observed gratings have exhibited the same temperature stability as gratings written by KrF excimer laser (248 nm).
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.