Patent ID: 7853149
Filing Date: 2010-12-14
Classification: H04B

Abstract:
1. An optical transmitter for transmitting data over an optical fiber at a specified data rate, wherein the optical transmitter comprises: a laser driver receiving the data, the laser driver including a pre-emphasis network amplifying data of a current period of a line rate by a factor of 1+x to generate amplified data, attenuating data of a previous period of the line rate by x to generated attenuated data, where x is a fraction between 0 and 1, and generating modified data by subtracting the attenuated data from the amplified data; and a laser coupled to the laser driver, the laser receiving the modified data and encoding the modified data to produce an optical signal suitable for transmission over the optical fiber and having a frequency spectrum that has a relative peak at a peak frequency located in a vicinity of the line rate and the relative peak is relative to a reference frequency spectrum of a reference optical signal produced by an ideal rectangular pulse transmitter encoding the data.