Patent ID: 6816518
Filing Date: 2004-11-09
Classification: H01S

Abstract:
A laser, comprising:a grating structure, comprising an optical fiber that comprises a super structure grating (SSG), generating a plurality of different wavelength peaks for reflection of optical radiation therefrom; and a semiconductor device, comprising: a gain region which is activated by direct current (DC) excitation so as to amplify the optical radiation, and a wavelength tunable filter (WTF) region which filters the optical radiation, the device being optically coupled to the grating structure so as to define a laser cavity having a multiplicity of cavity modes, which are selected by tuning a wavelength pass-band of the WTF region to overlap with one of the wavelength peaks of the grating structure so as to choose a selected wavelength; and a saturable absorber region which is modulated with a radio-frequency (RF) modulation that is substantially independent of the selected wavelength so as to pulse the optical radiation.