초록 ▼

An optical receiver suitable for use in a wavelength division multiplexing (WDM) system is able to tolerate shifts in the transmitting lasers' wavelength. During a periodically repeated wavelength synchronization phase, only a single transmitter laser is operating, and a peak finder locks onto the w

An optical receiver suitable for use in a wavelength division multiplexing (WDM) system is able to tolerate shifts in the transmitting lasers' wavelength. During a periodically repeated wavelength synchronization phase, only a single transmitter laser is operating, and a peak finder locks onto the wavelength having greatest power and notes the corresponding detector pixel's position. Thus, the receiver knows the relative wavelength of the transmitting laser in terms of the detector pixel illuminated with the brightest light, and can store this information for later reference. The active transmitter lasers take turns synchronizing their wavelengths during successive synchronization phases. During the multi-wavelength data transmission phase, many lasers in the system transmit information at the same time, at different wavelengths. During this phase, each receiver decodes the input from one or a few selected pixels identified previously during the synchronization phase as being associated with a particular selected transmitter.

대표청구항 ▼

[ The invention claimed:] [1.] An adaptive optical receiver comprising:means for receiving optical signals, said optical signals including a monochromatic synchronization signal and a transmission signal;means for dynamically determining relative wavelength of said synchronization signal, said means

[ The invention claimed:] [1.] An adaptive optical receiver comprising:means for receiving optical signals, said optical signals including a monochromatic synchronization signal and a transmission signal;means for dynamically determining relative wavelength of said synchronization signal, said means for determining includingmeans for spectrally decomposing the received synchronization signal,means for detecting a location of a highest intensity portion of the decomposed signal andmeans for relating the detected location to a relative frequency of the synchronization signal; andmeans for selectively accepting only portions of said transmission signal having wavelengths corresponding to said relative wavelength of said synchronization signal.