Glass ion-exchange technology for wavelength management applications

S. Ruschin, G. Hurwitz, T. Hurwitz, A. Kepten, E. Arad, Y. Soreq, S. Eckhouse

Research output: Contribution to journalConference articlepeer-review


We report the achievement of buried single-mode waveguides in special Boro-Aluminum-Silicate glass. The waveguides are characterized by very low propagation loss (< 0.1 dB/cm) and negligible birefringence. The optical mode at the input and output ports is essentially identical to the mode of a standard single-mode optical fiber. We fabricated and tested several devices and report here 1×8 and 1×16 powers splitters and an interleaver defined for a 100 GHz DWDM network. Due to the low birefringence of the waveguides, the TE and TM responses of the device are undistinguishable by customary characterization equipment. In addition we report a technique for permanent trimming of the optical circuit by localized heating. This unique advantage of ion-exchange technology, allowed us the adjustment of devices' parameters at post-fabrication stage. As an example, the trimming of a 2×2 directional coupler manifested here in the control of coupling coefficient value over a wide range (0.04-1.5). The process control was such that a target value of 0.5 for the coefficient was accurately attained. The same process enabled us the tuning of the interleaver to the ITU grid within 10pm accuracy.

Original languageEnglish
Pages (from-to)150-158
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2002
Externally publishedYes
EventIntegrated Optical Devices: Fabrication and Testing - Brugge, Belgium
Duration: 30 Oct 20021 Nov 2002


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