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Polarisation insensitive meander-type wavelength demultiplexer with large tuning range



EEOC '98. 24th European Conference on Optical Communication. Vol. 1
Madrid: Telefonica de Espana S.A., 1998
ISBN: 84-89900-14-0
ISBN: 0-7803-5227-0
European Conference on Optical Communication (ECOC) <24, 1998, Madrid>
European Exhibition on Optical Communication (EEOC) <4, 1998, Madrid>
Fraunhofer HHI ()
gallium arsenide; gallium compounds; iii-v semiconductors; indium compounds; optical communication equipment; optical directional couplers; optical fibre losses; optical tuning; optical waveguide filters; sensitivity; wavelength division multiplexing; polarisation insensitive meander-type wavelength demultiplexer; large tuning range; polarisation insensitive narrow band filter; InP technology; low insertion loss; centre wavelength suppression; polarisation insensitive narrow band dropping filter; meander-type codirectional coupler; GaInAsP-InP; optical fabrication; 2.5 db

A polarisation insensitive narrow band filter with large tuning range of about 20 nm based on InP technology is reported for the first time. A record low insertion loss of 2.5 dB and a through suppression at the centre wavelength of 20 dB has been achieved. We present a polarisation insensitive narrow band dropping filter with a large tuning range. The filter device is a meander-type codirectional coupler, fabricated in GaInAsP-InP.