title: Athermal silica-based interferometer-type planar light-wave circuits realized by a multicore fabrication method.
abstract: Athermal silica-based interferometer-type planar light-wave circuits were realized by a newly developed multicore fabrication method. In this method, inductively coupled chemical-vapor deposition and polishing technologies are adopted on a silica substrate with a trench-type waveguide pattern prepared by reactive ion etching. Two kinds of deposited core material, 10GeO2-90SiO2 (mol. %) and 8GeO2-5B2O3-87SiO2 (mol. %), which show wavelength temperature dependence of 9.7 and 8.1 pm/degree C, respectively, were used to prepare the waveguide sections in a device. By adjustment of the lengths of waveguide sections with these two different core materials, athermal characteristics of less than 0.5 pm/degree C were achieved for Mach-Zehnder interferometer filter devices at the 1.55-microm wavelength range while the temperature varied from -20 to 80 degrees C. The new method is also applicable for the preparation of many other kinds of functional devices.
authors.affiliation: Hoya Photonics Singapore Pte Ltd., 83 Science Park Drive, #03-01/02, The Curie, Singapore Science Park I, 118258, Singapore.
authors.forename: Liping
authors.initials: L
authors.lastname: Zuo
authors.forename: Hisanori
authors.initials: H
authors.lastname: Suzuki
authors.forename: Kenneth
authors.initials: K
authors.lastname: Kong
authors.forename: Junjie
authors.initials: J
authors.lastname: Si
authors.forename: Minyt Minyt
authors.initials: MM
authors.lastname: Aye
authors.forename: Atsushi
authors.initials: A
authors.lastname: Watabe
authors.forename: Shiro
authors.initials: S
authors.lastname: Takahashi