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

Permanent narrow-band reflection holograms in copper-doped lithium niobate channel waveguides for optical communications

Not Accessible

Your library or personal account may give you access


Lithium niobate is a widely used substrate material for integrated optics because of its outstanding acustooptical, electrooptical, and photorefractive properties. Holographic reflection gratings in this material may be well suited for different applications, e.g., dense wavelength division multiplexing (DWDM) or narrow-band mirrors for integrated DBR waveguide lasers. We investigate such holographic wavelength filters in copper-doped lithium niobate channel waveguides. Permanent refractive-index gratings are generated by thermal fixing of holograms. The waveguides are fabricated by successive indiffusion of titanium stripes and thin layers of copper. After high temperature recording with green light, refractive-index changes exceeding Aft = 8×lO−5 for infrared light (1550 nm) appear without the need of an additional development process. We believe that these strong refractive-index modulations most likely do not originate from the photorefractive effect but from material changes. The gratings are stable in the dark for at least one year without degradation, and no compensation mechanism via dark conductivity is observed.

© 2001 Optical Society of America

PDF Article
More Like This
UV photorefractive effect in Na+-doped lithium niobate crystals

Haijun Qiao, Jingjun Xu, Yongfa Kong, Qian Sun, and Guangyin Zhang
490 Photorefractive Effects, Materials, and Devices (PEMD) 2001


S.M. Kostritskii, Yu.N. Korkishko, V.A. Fedorov, R.F. Tavlykaev, and R.V. Ramaswamy
609 Photorefractive Effects, Materials, and Devices (PEMD) 2003


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
Login to access Optica Member Subscription

Select as filters

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