A dual wavelength (1.32-1.56 mu m) directional coupler demultiplexer by ion exchange in glass
- 1 September 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 2 (9) , 637-639
- https://doi.org/10.1109/68.59335
Abstract
A 1.32-1.56-μ m demultiplexer using a symmetrical directional coupler consisting of Ag/sup +/-Na/sup +/ exchanged channel waveguides in BK7 glass with a total insertion loss of 1.25 dB for a 14.5-mm-long device and a propagation loss of 0.15 dB/cm is demonstrated. The crosstalk at 1.315 and 1.561 mu m and the cross power ratio at 1.315 mu m were measured to be less than -40 dB for the TE mode.Keywords
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