A new reflective configuration for a monolithically integrated channel selector with power monitor is proposed.One star coupler, one arrayed waveguide grating, and a minimum number of SOA gates are used to achieve loss free transmission.A 32-channel device controlled by only 12 SOA-gates is realized in InP.Low on-chip losses result in strongly reduced bias currents and an improved signal to noise ratio compared to previously demonstrated devices.The use of SOAs allows for switching on a nanosecond time scale.
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Thourhout et al. (2002) studied this question.
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