Abstract: An optical fiber communication system is described that includes a data source that generates electrical data. A transmission filter filters the electrical data generated by the data source and passes a transmission spectrum. The transmitter filter has a transfer function that reduces adjacent symbol interference in a transmission spectrum. The bandwidth of the transmitter filter may be substantially optimized bandwidth. A modulator modulates the transmission spectrum on an optical signal. The modulator may be a substantially chirp-free modulator. A detector detects the modulated optical signal transmitted across an optical channel and converts the detected modulated optical signal to a received electrical data signal. A receiver filter filters the received electrical data signal. The receiver filter has a transfer function that reduces adjacent symbol interference in the received electrical data signal.

Abstract: A method and a resulting device for mounting a semiconductor to a submount by depositing a first layer of a first metal solder having a selected first melting point and corresponding thickness onto a surface of the semiconductor. Depositing a second layer of a second metal solder having a selected second melting point higher than the first melting point and a corresponding selected thickness onto a surface of the submount. Disposing the semiconductor surface and submount surface in confronting intimate contact and heating the submount and semiconductor to a temperature greater than the first temperature and lower that the second temperature for initiating and promoting liquid interdiffusion between the first and second solders.