Recently, broadband networks using multichannel wavelength division multiplexing (WDM) technologies, either for wavelength routing or for service segregation, have attracted much attention. 1 In such networks, tunable filters or optical receivers are of great interest2-4; a large wavelength-tuning range and fast wavelength-selection time are desired for such tunable receivers. One way to perform wavelength selection as schematically shown in Fig. 1, is to use a novel optoelectronic integrated circuit (OEIC) receiver with an array of photodetectors and an off-chip wavelength demultiplexer. The OEIC receiver performs optical detection, electronic switching, and signal amplification. Optical signals at different wavelengths transmitted through a single-mode fiber are demultiplexed by a WDM component and coupled into an array of photodetectors. Each detector in the receiver will be activated only when its electronic switch is turned on externally. When a detector is enabled, the wavelength is selected, and the detected signal is then amplified by an on-chip preamplifier. The speed of wavelength selection has the potential to be fast because of the small resistance-capacitance time constant that is achievable in the switching circuit. In addition, any WDM demultiplexer in the 1.1-1.6 μm spectral range can be used with the OEIC receiver, allowing a large wavelength selection range, flexible passbands, and channel spacings.

© 1991 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription