Patent ID: 7260126

Claim:
An optical pulses emitter, comprising a first and a second Fabry-Perot laser diodes having a first and second working optical wavelength band respectively, the first and second working wavelength bands having at least an overlapped wavelength band; a signal source in connection with the first laser diode such that a first plurality of optical pulses over the first working optical wavelength band is generated; a first optical filter, a fiber amplifier and a second optical filter connected optically in series for receiving the first plurality of optical pulses from the first laser diode and for outputting a second plurality of optical pulses primarily of a desired optical wavelength, which falls into the overlapped wavelength band and of a desired amplitude, wherein the first optical filter and the second optical filter are tunable relative to each other, and wherein said second plurality of optical pulses is externally injected into the second laser diode for generating optical pulses primarily of the desired optical wavelength.